Class 11 Chemistry - Some Basic Concepts of Chemistry - Nature of matter Easy Quiz

Chemistry Some Basic Concepts of Chemistry Nature of matter Easy Class 11 Level 9

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Question 1/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

पदार्थ की प्रकृति समझने में कण मॉडल क्यों उपयोगी है?

Why is the particle model useful in understanding the nature of matter?

Explanation opens after your attempt
Correct Answer

A. क्योंकि यह बताता है कि पदार्थ कणों से बना हैBecause it shows that matter is made of particles

Step 1

Concept

The particle model explains the structure of matter simply. Exam tip: understand properties through particle distance and motion.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि यह बताता है कि पदार्थ कणों से बना है / Because it shows that matter is made of particles. The particle model explains the structure of matter simply. Exam tip: understand properties through particle distance and motion.

Step 3

Exam Tip

कण मॉडल पदार्थ की संरचना को सरल बनाकर समझाता है। परीक्षा में कणों की दूरी और गति से गुण समझें।

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Question 2/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में कणों की ऊर्जा सामान्यतः सबसे कम होती है?

In which state do particles generally have the lowest energy?

Explanation opens after your attempt
Correct Answer

C. ठोसSolid

Step 1

Concept

Particles in solids have limited motion so energy is low. Exam tip: remember energy increases from solid to gas.

Step 2

Why this answer is correct

The correct answer is C. ठोस / Solid. Particles in solids have limited motion so energy is low. Exam tip: remember energy increases from solid to gas.

Step 3

Exam Tip

ठोस में कणों की गति सीमित होती है इसलिए ऊर्जा कम होती है। परीक्षा में ऊर्जा क्रम ठोस से गैस तक बढ़ता याद रखें।

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Question 3/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में कणों की ऊर्जा सामान्यतः सबसे अधिक होती है?

In which state do particles generally have the highest energy?

Explanation opens after your attempt
Correct Answer

C. गैसGas

Step 1

Concept

Gas particles move freely and rapidly. Exam tip: connect higher motion with higher energy.

Step 2

Why this answer is correct

The correct answer is C. गैस / Gas. Gas particles move freely and rapidly. Exam tip: connect higher motion with higher energy.

Step 3

Exam Tip

गैस के कण स्वतंत्र और तेज गति करते हैं। परीक्षा में अधिक गति को अधिक ऊर्जा से जोड़ें।

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Question 4/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

ठोस को गर्म करने पर उसके कणों में क्या बदलाव आता है?

What change occurs in particles of a solid when it is heated?

Explanation opens after your attempt
Correct Answer

A. वे अधिक कंपन करने लगते हैंThey vibrate more

Step 1

Concept

On heating solid particles gain energy and vibrate more. Exam tip: remember increased vibration before melting.

Step 2

Why this answer is correct

The correct answer is A. वे अधिक कंपन करने लगते हैं / They vibrate more. On heating solid particles gain energy and vibrate more. Exam tip: remember increased vibration before melting.

Step 3

Exam Tip

गर्म करने पर ठोस कण अधिक ऊर्जा पाते हैं और अधिक कंपन करते हैं। परीक्षा में गलन से पहले कंपन बढ़ना याद रखें।

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Question 5/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

ठंडा करने पर गैस के कणों की गति सामान्यतः कैसी होती है?

What generally happens to gas particle motion on cooling?

Explanation opens after your attempt
Correct Answer

B. गति घटती हैMotion decreases

Step 1

Concept

Cooling lowers particle energy. Exam tip: connect cooling with condensation.

Step 2

Why this answer is correct

The correct answer is B. गति घटती है / Motion decreases. Cooling lowers particle energy. Exam tip: connect cooling with condensation.

Step 3

Exam Tip

ठंडा करने पर कणों की ऊर्जा कम होती है। परीक्षा में शीतलन को संघनन से जोड़ें।

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Question 6/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में पदार्थ का आकार पात्र पर निर्भर नहीं करता?

In which state does the shape of matter not depend on the container?

Explanation opens after your attempt
Correct Answer

C. ठोसSolid

Step 1

Concept

A solid keeps its fixed shape. Exam tip: fixed shape indicates solid.

Step 2

Why this answer is correct

The correct answer is C. ठोस / Solid. A solid keeps its fixed shape. Exam tip: fixed shape indicates solid.

Step 3

Exam Tip

ठोस अपना निश्चित आकार बनाए रखता है। परीक्षा में आकार स्थिर हो तो ठोस पहचानें।

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Question 7/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

कौन सा कथन द्रव कणों के लिए सही है?

Which statement is correct for liquid particles?

Explanation opens after your attempt
Correct Answer

B. वे एक दूसरे के ऊपर खिसक सकते हैंThey can slide over one another

Step 1

Concept

Liquid particles are close but can slide. Exam tip: this is why liquids flow.

Step 2

Why this answer is correct

The correct answer is B. वे एक दूसरे के ऊपर खिसक सकते हैं / They can slide over one another. Liquid particles are close but can slide. Exam tip: this is why liquids flow.

Step 3

Exam Tip

द्रव के कण पास होते हैं पर खिसक सकते हैं। परीक्षा में इसी कारण द्रव बहते हैं।

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Question 8/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

गैस के कणों की व्यवस्था कैसी होती है?

How are gas particles arranged?

Explanation opens after your attempt
Correct Answer

B. दूर दूर और अनियमितFar apart and random

Step 1

Concept

Gas particles are far apart and move randomly. Exam tip: connect random motion with gases.

Step 2

Why this answer is correct

The correct answer is B. दूर दूर और अनियमित / Far apart and random. Gas particles are far apart and move randomly. Exam tip: connect random motion with gases.

Step 3

Exam Tip

गैस कण दूर और अनियमित रूप से चलते हैं। परीक्षा में अनियमित गति को गैस से जोड़ें।

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Question 9/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

एक बंद सिरिंज में हवा को दबाने पर आयतन क्यों घटता है?

Why does volume decrease when air is compressed in a closed syringe?

Explanation opens after your attempt
Correct Answer

A. क्योंकि गैस कणों के बीच रिक्त स्थान होता हैBecause there is empty space between gas particles

Step 1

Concept

There is more space between particles in a gas. Exam tip: use syringe example to understand compressibility.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि गैस कणों के बीच रिक्त स्थान होता है / Because there is empty space between gas particles. There is more space between particles in a gas. Exam tip: use syringe example to understand compressibility.

Step 3

Exam Tip

गैस में कणों के बीच जगह अधिक होती है। परीक्षा में सिरिंज उदाहरण से संपीड्यता समझें।

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Question 10/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

लोहे की छड़ को हाथ से दबाकर छोटा करना कठिन क्यों है?

Why is it difficult to make an iron rod smaller by pressing with hands?

Explanation opens after your attempt
Correct Answer

A. क्योंकि ठोस कण बहुत पास होते हैंBecause solid particles are very close

Step 1

Concept

Solids have very little empty space. Exam tip: remember the incompressibility of solids.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि ठोस कण बहुत पास होते हैं / Because solid particles are very close. Solids have very little empty space. Exam tip: remember the incompressibility of solids.

Step 3

Exam Tip

ठोस में रिक्त स्थान बहुत कम होता है। परीक्षा में ठोस की असंपीड्यता याद रखें।

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Question 11/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में पदार्थ को दबाकर आयतन बहुत अधिक घटाया जा सकता है?

In which state can volume be reduced greatly by compression?

Explanation opens after your attempt
Correct Answer

C. गैसGas

Step 1

Concept

Gases have large spaces between particles so they are highly compressible. Exam tip: compressibility is a key gas property.

Step 2

Why this answer is correct

The correct answer is C. गैस / Gas. Gases have large spaces between particles so they are highly compressible. Exam tip: compressibility is a key gas property.

Step 3

Exam Tip

गैसों में कणों के बीच बहुत जगह होती है इसलिए वे अधिक संपीड्य होती हैं। परीक्षा में संपीड्यता गैस का मुख्य गुण है।

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Question 12/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

एक कमरे में इत्र की गंध फैलना किस गुण को दिखाता है?

The spreading of perfume smell in a room shows which property?

Explanation opens after your attempt
Correct Answer

A. विसरणDiffusion

Step 1

Concept

Gas particles spread and mix which is called diffusion. Exam tip: smell spreading is a simple example of diffusion.

Step 2

Why this answer is correct

The correct answer is A. विसरण / Diffusion. Gas particles spread and mix which is called diffusion. Exam tip: smell spreading is a simple example of diffusion.

Step 3

Exam Tip

गैसों के कण फैलकर मिश्रित होते हैं इसे विसरण कहते हैं। परीक्षा में गंध फैलना विसरण का सरल उदाहरण है।

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Question 13/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

विसरण किस अवस्था में सबसे तेज होता है?

In which state is diffusion fastest?

Explanation opens after your attempt
Correct Answer

C. गैसGas

Step 1

Concept

Diffusion is fastest in gases because particles are free and fast. Exam tip: choose by particle motion.

Step 2

Why this answer is correct

The correct answer is C. गैस / Gas. Diffusion is fastest in gases because particles are free and fast. Exam tip: choose by particle motion.

Step 3

Exam Tip

गैसों में कण स्वतंत्र और तेज होते हैं इसलिए विसरण तेज होता है। परीक्षा में कण गति से उत्तर चुनें।

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Question 14/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

द्रवों में विसरण गैसों से धीमा क्यों होता है?

Why is diffusion in liquids slower than in gases?

Explanation opens after your attempt
Correct Answer

A. द्रव कण गैस कणों से अधिक पास होते हैंLiquid particles are closer than gas particles

Step 1

Concept

Liquid particles have less freedom than gas particles. Exam tip: check both particle distance and motion.

Step 2

Why this answer is correct

The correct answer is A. द्रव कण गैस कणों से अधिक पास होते हैं / Liquid particles are closer than gas particles. Liquid particles have less freedom than gas particles. Exam tip: check both particle distance and motion.

Step 3

Exam Tip

द्रव में कणों की स्वतंत्रता गैस से कम होती है। परीक्षा में कण दूरी और गति दोनों देखें।

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Question 15/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में सतह होती है पर वह पात्र का आकार भी लेती है?

Which state has a surface but also takes the shape of the container?

Explanation opens after your attempt
Correct Answer

B. द्रवLiquid

Step 1

Concept

A liquid can have a free surface and takes the container shape. Exam tip: connect surface and flow with liquids.

Step 2

Why this answer is correct

The correct answer is B. द्रव / Liquid. A liquid can have a free surface and takes the container shape. Exam tip: connect surface and flow with liquids.

Step 3

Exam Tip

द्रव की मुक्त सतह हो सकती है और वह पात्र का आकार लेता है। परीक्षा में सतह और प्रवाह को द्रव से जोड़ें।

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Question 16/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

गैस में मुक्त सतह सामान्यतः क्यों नहीं होती?

Why does a gas generally not have a free surface?

Explanation opens after your attempt
Correct Answer

A. क्योंकि वह पूरे पात्र में फैल जाती हैBecause it spreads throughout the container

Step 1

Concept

A gas does not remain at a fixed surface and fills the container. Exam tip: absence of free surface indicates gas.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि वह पूरे पात्र में फैल जाती है / Because it spreads throughout the container. A gas does not remain at a fixed surface and fills the container. Exam tip: absence of free surface indicates gas.

Step 3

Exam Tip

गैस किसी सीमित सतह पर नहीं रुकती और पूरा पात्र भरती है। परीक्षा में मुक्त सतह का अभाव गैस का संकेत है।

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Question 17/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में कठोरता सबसे अधिक सामान्य गुण है?

In which state is rigidity most commonly observed?

Explanation opens after your attempt
Correct Answer

A. ठोसSolid

Step 1

Concept

Solids show rigidity due to strong particle attraction. Exam tip: identify solids through rigidity.

Step 2

Why this answer is correct

The correct answer is A. ठोस / Solid. Solids show rigidity due to strong particle attraction. Exam tip: identify solids through rigidity.

Step 3

Exam Tip

ठोस में कणों का आकर्षण अधिक होने से कठोरता मिलती है। परीक्षा में कठोरता से ठोस पहचानें।

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Question 18/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

द्रव को तरल क्यों कहा जाता है?

Why is a liquid called fluid?

Explanation opens after your attempt
Correct Answer

A. क्योंकि वह बह सकता हैBecause it can flow

Step 1

Concept

A liquid has the ability to flow. Exam tip: remember fluidity in liquids and gases.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि वह बह सकता है / Because it can flow. A liquid has the ability to flow. Exam tip: remember fluidity in liquids and gases.

Step 3

Exam Tip

द्रव बहने की क्षमता रखता है। परीक्षा में तरलता को द्रव और गैस दोनों में याद रखें।

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Question 19/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

गैस को भी तरल क्यों माना जाता है?

Why is a gas also considered a fluid?

Explanation opens after your attempt
Correct Answer

A. क्योंकि वह बह सकती हैBecause it can flow

Step 1

Concept

Gas can flow and spread in a container. Exam tip: both liquids and gases are fluids.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि वह बह सकती है / Because it can flow. Gas can flow and spread in a container. Exam tip: both liquids and gases are fluids.

Step 3

Exam Tip

गैस बह सकती है और पात्र में फैल सकती है। परीक्षा में द्रव और गैस दोनों को फ्लुइड मानें।

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Question 20/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में कणों की व्यवस्था सबसे अधिक अनियमित होती है?

In which state is particle arrangement most random?

Explanation opens after your attempt
Correct Answer

B. गैसGas

Step 1

Concept

In gases particles are far apart and move randomly. Exam tip: connect randomness with gases.

Step 2

Why this answer is correct

The correct answer is B. गैस / Gas. In gases particles are far apart and move randomly. Exam tip: connect randomness with gases.

Step 3

Exam Tip

गैस में कण दूर और अनियमित रूप से गतिशील होते हैं। परीक्षा में अनियमितता को गैस से जोड़ें।

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Question 21/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में कणों का आकर्षण और गति दोनों मध्यम होते हैं?

In which state are particle attraction and motion both moderate?

Explanation opens after your attempt
Correct Answer

B. द्रवLiquid

Step 1

Concept

In liquids attraction is less than solids and more than gases. Exam tip: treat liquid as the middle state.

Step 2

Why this answer is correct

The correct answer is B. द्रव / Liquid. In liquids attraction is less than solids and more than gases. Exam tip: treat liquid as the middle state.

Step 3

Exam Tip

द्रव में कणों का आकर्षण ठोस से कम और गैस से अधिक होता है। परीक्षा में द्रव को बीच की अवस्था मानें।

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Question 22/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

बर्फ को गर्म करने पर पहले किस अवस्था में बदलना सामान्य है?

On heating ice what state does it normally change into first?

Explanation opens after your attempt
Correct Answer

B. द्रवLiquid

Step 1

Concept

Ice first melts into liquid water. Exam tip: remember the normal order of state changes.

Step 2

Why this answer is correct

The correct answer is B. द्रव / Liquid. Ice first melts into liquid water. Exam tip: remember the normal order of state changes.

Step 3

Exam Tip

बर्फ पिघलकर पहले द्रव जल बनती है। परीक्षा में सामान्य अवस्था परिवर्तन क्रम याद रखें।

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Question 23/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

जल को अधिक गर्म करने पर किस अवस्था में जाता है?

When water is heated strongly it changes into which state?

Explanation opens after your attempt
Correct Answer

B. गैसGas

Step 1

Concept

Water can boil and become vapour. Exam tip: write vaporisation for liquid to gas.

Step 2

Why this answer is correct

The correct answer is B. गैस / Gas. Water can boil and become vapour. Exam tip: write vaporisation for liquid to gas.

Step 3

Exam Tip

जल उबलकर जलवाष्प बन सकता है। परीक्षा में द्रव से गैस को वाष्पीकरण लिखें।

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Question 24/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

जलवाष्प को ठंडा करने पर क्या बनता है?

What forms when water vapour is cooled?

Explanation opens after your attempt
Correct Answer

A. द्रव जलLiquid water

Step 1

Concept

Water vapour cools and condenses into liquid water. Exam tip: call gas to liquid condensation.

Step 2

Why this answer is correct

The correct answer is A. द्रव जल / Liquid water. Water vapour cools and condenses into liquid water. Exam tip: call gas to liquid condensation.

Step 3

Exam Tip

जलवाष्प ठंडा होकर संघनित जल बनती है। परीक्षा में गैस से द्रव को संघनन कहें।

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Question 25/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

कौन सा पदार्थ सामान्यतः अपने पात्र का पूरा आयतन नहीं भरता?

Which substance generally does not fill the whole volume of its container?

Explanation opens after your attempt
Correct Answer

B. द्रव जलLiquid water

Step 1

Concept

A liquid has fixed volume so it does not fill the whole container. Exam tip: distinguish liquid and gas by volume.

Step 2

Why this answer is correct

The correct answer is B. द्रव जल / Liquid water. A liquid has fixed volume so it does not fill the whole container. Exam tip: distinguish liquid and gas by volume.

Step 3

Exam Tip

द्रव का आयतन निश्चित रहता है इसलिए वह पूरा पात्र नहीं भरता। परीक्षा में द्रव और गैस में आयतन से अंतर करें।

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Question 26/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

गुब्बारे में हवा भरने पर उसका आकार क्यों बदलता है?

Why does the shape of a balloon change when air is filled in it?

Explanation opens after your attempt
Correct Answer

A. हवा फैलकर गुब्बारे की दीवारों पर दबाव डालती हैAir spreads and exerts pressure on balloon walls

Step 1

Concept

Gas particles collide and exert pressure. Exam tip: understand gas pressure through daily examples.

Step 2

Why this answer is correct

The correct answer is A. हवा फैलकर गुब्बारे की दीवारों पर दबाव डालती है / Air spreads and exerts pressure on balloon walls. Gas particles collide and exert pressure. Exam tip: understand gas pressure through daily examples.

Step 3

Exam Tip

गैस कण टकराकर दबाव डालते हैं। परीक्षा में गैस का दाब दैनिक उदाहरणों से समझें।

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Question 27/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

खाली बोतल वास्तव में पूरी तरह खाली क्यों नहीं होती?

Why is an empty bottle not actually completely empty?

Explanation opens after your attempt
Correct Answer

A. उसमें हवा होती हैIt contains air

Step 1

Concept

A bottle contains air which is matter. Exam tip: remember air as invisible matter.

Step 2

Why this answer is correct

The correct answer is A. उसमें हवा होती है / It contains air. A bottle contains air which is matter. Exam tip: remember air as invisible matter.

Step 3

Exam Tip

बोतल में हवा होती है जो पदार्थ है। परीक्षा में हवा को अदृश्य पदार्थ के रूप में याद रखें।

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Question 28/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में पदार्थ का आयतन सबसे आसानी से बदलता है?

In which state does the volume of matter change most easily?

Explanation opens after your attempt
Correct Answer

C. गैसGas

Step 1

Concept

Gas expands and compresses easily. Exam tip: gas volume depends on container and pressure.

Step 2

Why this answer is correct

The correct answer is C. गैस / Gas. Gas expands and compresses easily. Exam tip: gas volume depends on container and pressure.

Step 3

Exam Tip

गैस आसानी से फैलती और संपीड़ित होती है। परीक्षा में गैस का आयतन पात्र और दाब पर निर्भर मानें।

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Question 29/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस पदार्थ में कणों के बीच रिक्त स्थान सबसे कम होता है?

Which matter has the least empty space between particles?

Explanation opens after your attempt
Correct Answer

C. ठोसSolid

Step 1

Concept

Particles are closest in solids. Exam tip: less empty space means less compressibility.

Step 2

Why this answer is correct

The correct answer is C. ठोस / Solid. Particles are closest in solids. Exam tip: less empty space means less compressibility.

Step 3

Exam Tip

ठोस में कण सबसे पास होते हैं। परीक्षा में कम रिक्त स्थान से कम संपीड्यता समझें।

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Question 30/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस पदार्थ में कणों के बीच रिक्त स्थान सबसे अधिक होता है?

Which matter has the most empty space between particles?

Explanation opens after your attempt
Correct Answer

C. गैसGas

Step 1

Concept

Gas has large distance between particles. Exam tip: more empty space means more compressibility.

Step 2

Why this answer is correct

The correct answer is C. गैस / Gas. Gas has large distance between particles. Exam tip: more empty space means more compressibility.

Step 3

Exam Tip

गैस में कणों के बीच दूरी अधिक होती है। परीक्षा में अधिक रिक्त स्थान से अधिक संपीड्यता याद रखें।

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Question 31/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

कणों के आकर्षण बल का सही घटता क्रम कौन सा है?

What is the correct decreasing order of particle attraction?

Explanation opens after your attempt
Correct Answer

A. ठोस द्रव गैसSolid liquid gas

Step 1

Concept

Attraction is highest in solids and lowest in gases. Exam tip: memorize the order.

Step 2

Why this answer is correct

The correct answer is A. ठोस द्रव गैस / Solid liquid gas. Attraction is highest in solids and lowest in gases. Exam tip: memorize the order.

Step 3

Exam Tip

आकर्षण बल ठोस में सबसे अधिक और गैस में सबसे कम होता है। परीक्षा में क्रम को याद रखें।

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Question 32/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

कणों की स्वतंत्र गति का सही बढ़ता क्रम कौन सा है?

What is the correct increasing order of freedom of particle motion?

Explanation opens after your attempt
Correct Answer

B. ठोस द्रव गैसSolid liquid gas

Step 1

Concept

Freedom of motion is lowest in solids and highest in gases. Exam tip: study motion and state in order.

Step 2

Why this answer is correct

The correct answer is B. ठोस द्रव गैस / Solid liquid gas. Freedom of motion is lowest in solids and highest in gases. Exam tip: study motion and state in order.

Step 3

Exam Tip

स्वतंत्र गति ठोस में कम और गैस में अधिक होती है। परीक्षा में गति और अवस्था को क्रम में पढ़ें।

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Question 33/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस घटना में कणों के बीच दूरी बढ़ती है?

In which event does distance between particles increase?

Explanation opens after your attempt
Correct Answer

A. ठोस का द्रव में पिघलनाSolid melting into liquid

Step 1

Concept

During melting particles become freer and distance increases. Exam tip: remember heating increases particle separation.

Step 2

Why this answer is correct

The correct answer is A. ठोस का द्रव में पिघलना / Solid melting into liquid. During melting particles become freer and distance increases. Exam tip: remember heating increases particle separation.

Step 3

Exam Tip

गलन में कण अधिक स्वतंत्र हो जाते हैं और दूरी बढ़ती है। परीक्षा में गर्म करने पर दूरी बढ़ना याद रखें।

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Question 34/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस घटना में कणों के बीच दूरी घटती है?

In which event does distance between particles decrease?

Explanation opens after your attempt
Correct Answer

C. गैस का द्रव बननाGas becoming liquid

Step 1

Concept

In condensation gas particles come closer to form liquid. Exam tip: remember cooling reduces particle separation.

Step 2

Why this answer is correct

The correct answer is C. गैस का द्रव बनना / Gas becoming liquid. In condensation gas particles come closer to form liquid. Exam tip: remember cooling reduces particle separation.

Step 3

Exam Tip

संघनन में गैस कण पास आकर द्रव बनाते हैं। परीक्षा में ठंडा करने पर दूरी घटती याद रखें।

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Question 35/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

द्रव का निश्चित आयतन किस कारण होता है?

Why does a liquid have a fixed volume?

Explanation opens after your attempt
Correct Answer

A. कणों में पर्याप्त आकर्षण रहता हैThere is sufficient attraction among particles

Step 1

Concept

Liquid particles remain close so volume is nearly fixed. Exam tip: remember liquid shape and volume separately.

Step 2

Why this answer is correct

The correct answer is A. कणों में पर्याप्त आकर्षण रहता है / There is sufficient attraction among particles. Liquid particles remain close so volume is nearly fixed. Exam tip: remember liquid shape and volume separately.

Step 3

Exam Tip

द्रव कण पास रहते हैं इसलिए आयतन लगभग निश्चित रहता है। परीक्षा में द्रव का आकार और आयतन अलग याद रखें।

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Question 36/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

गैस का निश्चित आकार क्यों नहीं होता?

Why does a gas not have a fixed shape?

Explanation opens after your attempt
Correct Answer

A. कण स्वतंत्र रूप से घूमते हैंParticles move freely

Step 1

Concept

Gas particles move freely and take the container shape. Exam tip: use free motion as the reason.

Step 2

Why this answer is correct

The correct answer is A. कण स्वतंत्र रूप से घूमते हैं / Particles move freely. Gas particles move freely and take the container shape. Exam tip: use free motion as the reason.

Step 3

Exam Tip

गैस कण स्वतंत्र रूप से फैलकर पात्र का आकार लेते हैं। परीक्षा में स्वतंत्र गति को कारण मानें।

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Question 37/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

ठोस का निश्चित आकार किस कारण होता है?

Why does a solid have a fixed shape?

Explanation opens after your attempt
Correct Answer

A. कण निश्चित स्थानों पर व्यवस्थित रहते हैंParticles remain arranged at fixed positions

Step 1

Concept

Solid particles only vibrate about their positions. Exam tip: fixed positions are the main reason for solid shape.

Step 2

Why this answer is correct

The correct answer is A. कण निश्चित स्थानों पर व्यवस्थित रहते हैं / Particles remain arranged at fixed positions. Solid particles only vibrate about their positions. Exam tip: fixed positions are the main reason for solid shape.

Step 3

Exam Tip

ठोस कण अपने स्थानों से केवल कंपन करते हैं। परीक्षा में निश्चित स्थान को ठोस का मुख्य कारण मानें।

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Question 38/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

कौन सा विकल्प गैस की विशेषता नहीं है?

Which option is not a characteristic of a gas?

Explanation opens after your attempt
Correct Answer

C. निश्चित आकारFixed shape

Step 1

Concept

A gas does not have a fixed shape. Exam tip: be careful in negative questions.

Step 2

Why this answer is correct

The correct answer is C. निश्चित आकार / Fixed shape. A gas does not have a fixed shape. Exam tip: be careful in negative questions.

Step 3

Exam Tip

गैस का निश्चित आकार नहीं होता। परीक्षा में नकारात्मक प्रश्नों में सावधानी रखें।

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Question 39/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

कौन सा विकल्प द्रव की विशेषता नहीं है?

Which option is not a characteristic of a liquid?

Explanation opens after your attempt
Correct Answer

D. पूरा पात्र अवश्य भरनाNecessarily filling whole container

Step 1

Concept

A liquid takes the container shape but need not fill it completely. Exam tip: remember the difference between liquid and gas.

Step 2

Why this answer is correct

The correct answer is D. पूरा पात्र अवश्य भरना / Necessarily filling whole container. A liquid takes the container shape but need not fill it completely. Exam tip: remember the difference between liquid and gas.

Step 3

Exam Tip

द्रव पात्र का आकार लेता है पर पूरा पात्र जरूरी नहीं भरता। परीक्षा में द्रव और गैस का अंतर याद रखें।

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Question 40/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

कौन सा विकल्प ठोस की विशेषता नहीं है?

Which option is not a characteristic of a solid?

Explanation opens after your attempt
Correct Answer

D. पूरा पात्र भरनाFilling the whole container

Step 1

Concept

Filling the whole container is a property of gas not solid. Exam tip: match options with states.

Step 2

Why this answer is correct

The correct answer is D. पूरा पात्र भरना / Filling the whole container. Filling the whole container is a property of gas not solid. Exam tip: match options with states.

Step 3

Exam Tip

पूरा पात्र भरना गैस का गुण है ठोस का नहीं। परीक्षा में विकल्पों को अवस्था से मिलाएँ।

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Question 41/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में पदार्थ को पात्र से बाहर निकालने पर उसका अपना आकार बना रह सकता है?

In which state can matter keep its own shape after being removed from a container?

Explanation opens after your attempt
Correct Answer

A. ठोसSolid

Step 1

Concept

A solid has its own shape. Exam tip: identify state by behaviour outside the container.

Step 2

Why this answer is correct

The correct answer is A. ठोस / Solid. A solid has its own shape. Exam tip: identify state by behaviour outside the container.

Step 3

Exam Tip

ठोस का अपना आकार होता है। परीक्षा में पात्र से बाहर व्यवहार देखकर अवस्था पहचानें।

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Question 42/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में पदार्थ पात्र से बाहर फैलकर बह सकता है?

In which state can matter spread and flow out of a container?

Explanation opens after your attempt
Correct Answer

B. द्रवLiquid

Step 1

Concept

A liquid can spread out because it flows. Exam tip: flow indicates liquid.

Step 2

Why this answer is correct

The correct answer is B. द्रव / Liquid. A liquid can spread out because it flows. Exam tip: flow indicates liquid.

Step 3

Exam Tip

द्रव बहने के कारण पात्र से बाहर फैल सकता है। परीक्षा में बहना द्रव का संकेत है।

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Question 43/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में पदार्थ बंद पात्र से बाहर निकलते ही तेजी से फैल सकता है?

In which state can matter spread rapidly when released from a closed container?

Explanation opens after your attempt
Correct Answer

C. गैसGas

Step 1

Concept

Gas particles spread freely. Exam tip: connect rapid spreading with gases.

Step 2

Why this answer is correct

The correct answer is C. गैस / Gas. Gas particles spread freely. Exam tip: connect rapid spreading with gases.

Step 3

Exam Tip

गैस कण स्वतंत्र रूप से फैलते हैं। परीक्षा में तेज फैलाव को गैस से जोड़ें।

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Question 44/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

द्रवों की संपीड्यता गैसों से कम क्यों होती है?

Why are liquids less compressible than gases?

Explanation opens after your attempt
Correct Answer

A. द्रव कण अधिक पास होते हैंLiquid particles are closer

Step 1

Concept

Liquids have less empty space than gases. Exam tip: connect compressibility with empty space.

Step 2

Why this answer is correct

The correct answer is A. द्रव कण अधिक पास होते हैं / Liquid particles are closer. Liquids have less empty space than gases. Exam tip: connect compressibility with empty space.

Step 3

Exam Tip

द्रव में रिक्त स्थान गैसों से कम होता है। परीक्षा में संपीड्यता को रिक्त स्थान से जोड़ें।

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Question 45/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

ठोस में आकार परिवर्तन कठिन क्यों होता है?

Why is shape change difficult in solids?

Explanation opens after your attempt
Correct Answer

A. कणों का आकर्षण मजबूत होता हैParticle attraction is strong

Step 1

Concept

Strong attraction keeps particles arranged. Exam tip: attraction explains rigidity of solids.

Step 2

Why this answer is correct

The correct answer is A. कणों का आकर्षण मजबूत होता है / Particle attraction is strong. Strong attraction keeps particles arranged. Exam tip: attraction explains rigidity of solids.

Step 3

Exam Tip

मजबूत आकर्षण कणों को व्यवस्थित रखता है। परीक्षा में ठोस की कठोरता का कारण आकर्षण है।

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Question 46/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

किस अवस्था में दाब का प्रभाव सबसे स्पष्ट होता है?

In which state is the effect of pressure most noticeable?

Explanation opens after your attempt
Correct Answer

B. गैसGas

Step 1

Concept

Gas volume changes easily with pressure. Exam tip: remember the pressure-gas relation.

Step 2

Why this answer is correct

The correct answer is B. गैस / Gas. Gas volume changes easily with pressure. Exam tip: remember the pressure-gas relation.

Step 3

Exam Tip

गैस का आयतन दाब से आसानी से बदलता है। परीक्षा में दाब और गैस का संबंध याद रखें।

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Question 47/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

द्रव की मुक्त सतह किस उदाहरण में स्पष्ट दिखती है?

In which example is the free surface of a liquid clearly seen?

Explanation opens after your attempt
Correct Answer

A. गिलास में पानीWater in a glass

Step 1

Concept

Water in a glass forms a surface at the top. Exam tip: remember the free surface of liquids.

Step 2

Why this answer is correct

The correct answer is A. गिलास में पानी / Water in a glass. Water in a glass forms a surface at the top. Exam tip: remember the free surface of liquids.

Step 3

Exam Tip

गिलास में पानी ऊपर एक सतह बनाता है। परीक्षा में द्रव की मुक्त सतह याद रखें।

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Question 48/48 Easy Chemistry Some Basic Concepts of Chemistry Nature of matter Class 11 Level 9

पदार्थ की अवस्था पहचानने में कौन सा जोड़ा सबसे उपयोगी है?

Which pair is most useful to identify the state of matter?

Explanation opens after your attempt
Correct Answer

A. आकार और आयतनShape and volume

Step 1

Concept

Shape and volume distinguish solid liquid and gas. Exam tip: check these two first.

Step 2

Why this answer is correct

The correct answer is A. आकार और आयतन / Shape and volume. Shape and volume distinguish solid liquid and gas. Exam tip: check these two first.

Step 3

Exam Tip

आकार और आयतन से ठोस द्रव गैस में अंतर किया जाता है। परीक्षा में पहले इन दोनों को जाँचें।

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