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

Level 2 • 50/50 questions • 40 seconds per question.

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Answered 0/50 Correct 0 Time 33:20

ठोस पदार्थ में कणों की व्यवस्था सामान्यतः कैसी होती है?

How are particles generally arranged in a solid?

Explanation opens after your attempt
Correct Answer

A. बहुत पास और व्यवस्थितVery close and orderly

Step 1

Concept

In solids particles remain very close. Therefore shape and volume are fixed.

Step 2

Why this answer is correct

The correct answer is A. बहुत पास और व्यवस्थित / Very close and orderly. In solids particles remain very close. Therefore shape and volume are fixed.

Step 3

Exam Tip

ठोस में कण बहुत पास रहते हैं। इसी कारण shape और volume fixed होते हैं।

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द्रव में कणों की गति ठोस की तुलना में कैसी होती है?

How is particle motion in a liquid compared with a solid?

Explanation opens after your attempt
Correct Answer

B. अधिक होती हैMore

Step 1

Concept

Particles of a liquid move more freely than those in a solid. Therefore liquid can flow.

Step 2

Why this answer is correct

The correct answer is B. अधिक होती है / More. Particles of a liquid move more freely than those in a solid. Therefore liquid can flow.

Step 3

Exam Tip

द्रव के कण ठोस की तुलना में अधिक स्वतंत्रता से गति करते हैं। इसलिए liquid flow कर सकता है।

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गैस में कणों की व्यवस्था कैसी होती है?

How are particles arranged in a gas?

Explanation opens after your attempt
Correct Answer

C. बहुत दूर-दूर और randomFar apart and random

Step 1

Concept

Gas particles are far apart and move randomly. Therefore gas fills the container.

Step 2

Why this answer is correct

The correct answer is C. बहुत दूर-दूर और random / Far apart and random. Gas particles are far apart and move randomly. Therefore gas fills the container.

Step 3

Exam Tip

गैस के कण दूर-दूर होते हैं और random motion करते हैं। इसलिए gas container भर देती है।

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कौन सा पदार्थ आसानी से बह सकता है?

Which matter can flow easily?

Explanation opens after your attempt
Correct Answer

D. द्रव और गैसLiquids and gases

Step 1

Concept

Liquids and gases are called fluids because they can flow. Solids generally do not flow.

Step 2

Why this answer is correct

The correct answer is D. द्रव और गैस / Liquids and gases. Liquids and gases are called fluids because they can flow. Solids generally do not flow.

Step 3

Exam Tip

द्रव और गैस fluids कहलाते हैं क्योंकि वे flow कर सकते हैं। ठोस सामान्यतः flow नहीं करते।

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Fluid शब्द किन अवस्थाओं के लिए प्रयोग होता है?

The term fluid is used for which states?

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Correct Answer

A. द्रव और गैसLiquid and gas

Step 1

Concept

Liquids and gases can flow. Therefore both are called fluids.

Step 2

Why this answer is correct

The correct answer is A. द्रव और गैस / Liquid and gas. Liquids and gases can flow. Therefore both are called fluids.

Step 3

Exam Tip

द्रव और गैस flow कर सकते हैं। इसलिए दोनों को fluids कहा जाता है।

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निम्न में से कौन ठोस का उदाहरण है?

Which of the following is an example of a solid?

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Correct Answer

B. लकड़ीWood

Step 1

Concept

Wood has definite shape and volume. Therefore it is an example of solid.

Step 2

Why this answer is correct

The correct answer is B. लकड़ी / Wood. Wood has definite shape and volume. Therefore it is an example of solid.

Step 3

Exam Tip

लकड़ी का shape और volume निश्चित होता है। इसलिए यह solid का example है।

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निम्न में से कौन द्रव का उदाहरण है?

Which of the following is an example of a liquid?

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Correct Answer

C. तेलOil

Step 1

Concept

Oil is a liquid because it flows and takes the shape of container. Its volume remains nearly fixed.

Step 2

Why this answer is correct

The correct answer is C. तेल / Oil. Oil is a liquid because it flows and takes the shape of container. Its volume remains nearly fixed.

Step 3

Exam Tip

तेल द्रव है क्योंकि वह flow करता है और container का shape लेता है। उसका volume लगभग fixed रहता है।

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निम्न में से कौन गैस का उदाहरण है?

Which of the following is an example of a gas?

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Correct Answer

D. कार्बन डाइऑक्साइडCarbon dioxide

Step 1

Concept

Carbon dioxide is a gas. It can fill the container.

Step 2

Why this answer is correct

The correct answer is D. कार्बन डाइऑक्साइड / Carbon dioxide. Carbon dioxide is a gas. It can fill the container.

Step 3

Exam Tip

कार्बन डाइऑक्साइड gas है। यह container को fill कर सकती है।

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ठोस का आकार निश्चित क्यों रहता है?

Why does a solid have a definite shape?

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Correct Answer

A. कणों का आकर्षण बल मजबूत होता हैParticles have strong attraction

Step 1

Concept

In solids particles vibrate around fixed positions. Strong attraction maintains shape.

Step 2

Why this answer is correct

The correct answer is A. कणों का आकर्षण बल मजबूत होता है / Particles have strong attraction. In solids particles vibrate around fixed positions. Strong attraction maintains shape.

Step 3

Exam Tip

ठोस में कण fixed positions के आसपास vibrate करते हैं। मजबूत attraction shape बनाए रखता है।

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द्रव पात्र का आकार क्यों लेता है?

Why does a liquid take the shape of a container?

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Correct Answer

B. क्योंकि उसके कण एक-दूसरे के ऊपर सरक सकते हैंBecause its particles can slide over one another

Step 1

Concept

Liquid particles are not fixed like solids. Therefore liquid takes the shape of the container.

Step 2

Why this answer is correct

The correct answer is B. क्योंकि उसके कण एक-दूसरे के ऊपर सरक सकते हैं / Because its particles can slide over one another. Liquid particles are not fixed like solids. Therefore liquid takes the shape of the container.

Step 3

Exam Tip

द्रव के कण ठोस की तरह fixed नहीं होते। इसलिए वह container का shape लेता है।

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गैस पूरे पात्र को क्यों भर देती है?

Why does a gas fill the entire container?

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Correct Answer

C. क्योंकि कण स्वतंत्र रूप से दूर-दूर तक चलते हैंBecause particles move freely and far apart

Step 1

Concept

Gas particles move freely and randomly. Therefore they spread throughout available space.

Step 2

Why this answer is correct

The correct answer is C. क्योंकि कण स्वतंत्र रूप से दूर-दूर तक चलते हैं / Because particles move freely and far apart. Gas particles move freely and randomly. Therefore they spread throughout available space.

Step 3

Exam Tip

गैस के कण स्वतंत्र और random गति करते हैं। इसलिए वे पूरे available space में फैल जाते हैं।

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ठोस से द्रव में परिवर्तन को क्या कहते हैं?

What is the change from solid to liquid called?

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Correct Answer

D. गलनMelting

Step 1

Concept

In melting a solid changes into liquid. Example is ice becoming water.

Step 2

Why this answer is correct

The correct answer is D. गलन / Melting. In melting a solid changes into liquid. Example is ice becoming water.

Step 3

Exam Tip

गलन में solid liquid में बदलता है। उदाहरण के लिए ice का water बनना।

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द्रव से गैस में परिवर्तन को सामान्यतः क्या कहते हैं?

What is the change from liquid to gas generally called?

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Correct Answer

A. वाष्पीकरणVaporization

Step 1

Concept

In vaporization liquid changes into gas. The process can become faster with increase in temperature.

Step 2

Why this answer is correct

The correct answer is A. वाष्पीकरण / Vaporization. In vaporization liquid changes into gas. The process can become faster with increase in temperature.

Step 3

Exam Tip

वाष्पीकरण में liquid gas में बदलता है। ताप बढ़ने से यह process तेज हो सकता है।

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गैस से द्रव में परिवर्तन को क्या कहते हैं?

What is the change from gas to liquid called?

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Correct Answer

B. संघननCondensation

Step 1

Concept

In condensation gas changes into liquid. Example is water vapour forming droplets.

Step 2

Why this answer is correct

The correct answer is B. संघनन / Condensation. In condensation gas changes into liquid. Example is water vapour forming droplets.

Step 3

Exam Tip

संघनन में gas liquid में बदलती है। जैसे water vapour का droplets बनना।

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द्रव से ठोस में परिवर्तन को क्या कहते हैं?

What is the change from liquid to solid called?

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Correct Answer

C. जमनाFreezing

Step 1

Concept

In freezing liquid changes into solid. Water becoming ice is a common example.

Step 2

Why this answer is correct

The correct answer is C. जमना / Freezing. In freezing liquid changes into solid. Water becoming ice is a common example.

Step 3

Exam Tip

जमने में liquid solid में बदलता है। पानी का ice बनना common example है।

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ठोस से सीधे गैस में परिवर्तन को क्या कहते हैं?

What is direct change from solid to gas called?

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Correct Answer

D. उर्ध्वपातनSublimation

Step 1

Concept

In sublimation a solid changes into gas without becoming liquid. Camphor is an example.

Step 2

Why this answer is correct

The correct answer is D. उर्ध्वपातन / Sublimation. In sublimation a solid changes into gas without becoming liquid. Camphor is an example.

Step 3

Exam Tip

उर्ध्वपातन में solid liquid बने बिना gas में बदलता है। कपूर इसका example है।

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कपूर का धीरे-धीरे गायब होना किस प्रक्रिया से जुड़ा है?

Camphor slowly disappearing is related to which process?

Explanation opens after your attempt
Correct Answer

A. उर्ध्वपातनSublimation

Step 1

Concept

Camphor can change directly from solid to vapour. This is called sublimation.

Step 2

Why this answer is correct

The correct answer is A. उर्ध्वपातन / Sublimation. Camphor can change directly from solid to vapour. This is called sublimation.

Step 3

Exam Tip

कपूर solid से सीधे vapour में बदल सकता है। इसे sublimation कहते हैं।

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नाफ्थलीन की गोलियों का छोटा होना किसका उदाहरण है?

Shrinking of naphthalene balls is an example of what?

Explanation opens after your attempt
Correct Answer

B. उर्ध्वपातनSublimation

Step 1

Concept

Naphthalene changes directly from solid to vapour. Therefore its size gradually decreases.

Step 2

Why this answer is correct

The correct answer is B. उर्ध्वपातन / Sublimation. Naphthalene changes directly from solid to vapour. Therefore its size gradually decreases.

Step 3

Exam Tip

नाफ्थलीन solid से सीधे vapour में बदलता है। इसलिए उसका size धीरे-धीरे कम होता है।

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वाष्पीकरण किस सतह पर होता है?

At which surface does evaporation occur?

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Correct Answer

C. द्रव की सतह परAt the surface of liquid

Step 1

Concept

Evaporation occurs from the surface of a liquid. It is different from boiling.

Step 2

Why this answer is correct

The correct answer is C. द्रव की सतह पर / At the surface of liquid. Evaporation occurs from the surface of a liquid. It is different from boiling.

Step 3

Exam Tip

Evaporation liquid surface से होता है। यह boiling से अलग है।

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उबलना वाष्पीकरण से कैसे अलग है?

How is boiling different from evaporation?

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Correct Answer

D. उबलना पूरे द्रव में निश्चित ताप पर होता हैBoiling occurs throughout liquid at a fixed temperature

Step 1

Concept

Boiling occurs throughout the liquid and bubbles form. Evaporation is a surface process.

Step 2

Why this answer is correct

The correct answer is D. उबलना पूरे द्रव में निश्चित ताप पर होता है / Boiling occurs throughout liquid at a fixed temperature. Boiling occurs throughout the liquid and bubbles form. Evaporation is a surface process.

Step 3

Exam Tip

Boiling पूरे liquid में होता है और bubbles बनते हैं। Evaporation surface process है।

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वाष्पीकरण की दर ताप बढ़ने पर कैसी होती है?

What happens to rate of evaporation when temperature increases?

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Correct Answer

A. बढ़ती हैIncreases

Step 1

Concept

With increase in temperature kinetic energy of particles increases. Therefore evaporation becomes faster.

Step 2

Why this answer is correct

The correct answer is A. बढ़ती है / Increases. With increase in temperature kinetic energy of particles increases. Therefore evaporation becomes faster.

Step 3

Exam Tip

ताप बढ़ने से particles की kinetic energy बढ़ती है। इसलिए evaporation तेज हो जाता है।

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हवा चलने पर कपड़े जल्दी सूखते हैं क्योंकि क्या बढ़ता है?

Clothes dry faster in wind because what increases?

Explanation opens after your attempt
Correct Answer

B. वाष्पीकरण की दरRate of evaporation

Step 1

Concept

Wind removes water vapour away. This increases rate of evaporation.

Step 2

Why this answer is correct

The correct answer is B. वाष्पीकरण की दर / Rate of evaporation. Wind removes water vapour away. This increases rate of evaporation.

Step 3

Exam Tip

हवा water vapour को दूर ले जाती है। इससे evaporation की दर बढ़ती है।

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गीले कपड़े धूप में जल्दी क्यों सूखते हैं?

Why do wet clothes dry faster in sunlight?

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Correct Answer

C. ताप बढ़ने से वाष्पीकरण तेज होता हैHigher temperature speeds evaporation

Step 1

Concept

Sunlight increases temperature. Thus water particles change into vapour faster.

Step 2

Why this answer is correct

The correct answer is C. ताप बढ़ने से वाष्पीकरण तेज होता है / Higher temperature speeds evaporation. Sunlight increases temperature. Thus water particles change into vapour faster.

Step 3

Exam Tip

धूप से temperature बढ़ता है। इससे water particles जल्दी vapour में बदलते हैं।

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ठंडा पेय बाहर रखने पर उसकी बोतल पर बूंदें क्यों बनती हैं?

Why do droplets form on the bottle of a cold drink kept outside?

Explanation opens after your attempt
Correct Answer

D. वायु में जलवाष्प संघनित होती हैWater vapour in air condenses

Step 1

Concept

A cold surface changes water vapour into droplets. This is called condensation.

Step 2

Why this answer is correct

The correct answer is D. वायु में जलवाष्प संघनित होती है / Water vapour in air condenses. A cold surface changes water vapour into droplets. This is called condensation.

Step 3

Exam Tip

ठंडी सतह water vapour को droplets में बदल देती है। इसे condensation कहते हैं।

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मिट्टी के घड़े में पानी ठंडा क्यों होता है?

Why does water become cool in an earthen pot?

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Correct Answer

A. वाष्पीकरण से cooling होती हैEvaporation causes cooling

Step 1

Concept

Water evaporates through small pores of the pot. Evaporation takes heat and gives cooling.

Step 2

Why this answer is correct

The correct answer is A. वाष्पीकरण से cooling होती है / Evaporation causes cooling. Water evaporates through small pores of the pot. Evaporation takes heat and gives cooling.

Step 3

Exam Tip

घड़े के छोटे pores से पानी evaporate होता है। Evaporation heat लेकर cooling देता है।

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वाष्पीकरण से ठंडक क्यों महसूस होती है?

Why is cooling felt due to evaporation?

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Correct Answer

B. क्योंकि high energy particles heat लेकर निकलते हैंBecause high energy particles escape carrying heat

Step 1

Concept

In evaporation higher energy particles escape. The average energy of remaining liquid decreases.

Step 2

Why this answer is correct

The correct answer is B. क्योंकि high energy particles heat लेकर निकलते हैं / Because high energy particles escape carrying heat. In evaporation higher energy particles escape. The average energy of remaining liquid decreases.

Step 3

Exam Tip

Evaporation में अधिक ऊर्जा वाले particles बाहर निकलते हैं। बाकी liquid का average energy कम हो जाती है।

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सर्दियों में धुंध बनना किस प्रक्रिया से जुड़ा है?

Formation of fog in winter is related to which process?

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Correct Answer

C. संघननCondensation

Step 1

Concept

In cold air water vapour can condense into tiny droplets. This is related to fog formation.

Step 2

Why this answer is correct

The correct answer is C. संघनन / Condensation. In cold air water vapour can condense into tiny droplets. This is related to fog formation.

Step 3

Exam Tip

ठंडी हवा में जलवाष्प छोटे droplets में condense हो सकती है। यही fog formation से जुड़ा है।

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वाष्पीकरण और उबलने में कौन सा कथन सही है?

Which statement is correct about evaporation and boiling?

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Correct Answer

D. वाष्पीकरण किसी भी ताप पर हो सकता हैEvaporation can occur at any temperature

Step 1

Concept

Evaporation can occur at any temperature from surface. Boiling occurs throughout liquid at fixed boiling point.

Step 2

Why this answer is correct

The correct answer is D. वाष्पीकरण किसी भी ताप पर हो सकता है / Evaporation can occur at any temperature. Evaporation can occur at any temperature from surface. Boiling occurs throughout liquid at fixed boiling point.

Step 3

Exam Tip

Evaporation surface से किसी भी temperature पर हो सकता है। Boiling fixed boiling point पर पूरे liquid में होता है।

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द्रव की सतह area बढ़ाने से evaporation पर क्या असर होता है?

What is the effect of increasing surface area of a liquid on evaporation?

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A. वाष्पीकरण बढ़ता हैEvaporation increases

Step 1

Concept

When surface area increases more particles can escape. Therefore evaporation rate increases.

Step 2

Why this answer is correct

The correct answer is A. वाष्पीकरण बढ़ता है / Evaporation increases. When surface area increases more particles can escape. Therefore evaporation rate increases.

Step 3

Exam Tip

Surface area बढ़ने पर अधिक particles escape कर सकते हैं। इसलिए evaporation rate बढ़ती है।

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Humidity अधिक होने पर evaporation सामान्यतः कैसी होती है?

When humidity is high how is evaporation generally affected?

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B. धीमी होती हैBecomes slow

Step 1

Concept

In high humidity air already has more water vapour. Therefore evaporation can become slower.

Step 2

Why this answer is correct

The correct answer is B. धीमी होती है / Becomes slow. In high humidity air already has more water vapour. Therefore evaporation can become slower.

Step 3

Exam Tip

High humidity में air में पहले से जलवाष्प अधिक होता है। इसलिए evaporation धीमा हो सकता है।

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Boiling point का सरल अर्थ क्या है?

What is the simple meaning of boiling point?

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C. जिस ताप पर liquid उबलता हैTemperature at which a liquid boils

Step 1

Concept

Boiling point is the temperature at which liquid changes rapidly into vapour. It is a physical property.

Step 2

Why this answer is correct

The correct answer is C. जिस ताप पर liquid उबलता है / Temperature at which a liquid boils. Boiling point is the temperature at which liquid changes rapidly into vapour. It is a physical property.

Step 3

Exam Tip

Boiling point वह temperature है जहाँ liquid vapour में तेजी से बदलता है। यह पदार्थ की physical property है।

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Melting point का सरल अर्थ क्या है?

What is the simple meaning of melting point?

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D. जिस ताप पर solid liquid बनेTemperature at which solid becomes liquid

Step 1

Concept

Melting point is the temperature at which solid changes into liquid. It can help identify a substance.

Step 2

Why this answer is correct

The correct answer is D. जिस ताप पर solid liquid बने / Temperature at which solid becomes liquid. Melting point is the temperature at which solid changes into liquid. It can help identify a substance.

Step 3

Exam Tip

Melting point वह temperature है जहाँ solid liquid में बदलता है। यह पदार्थ की पहचान में मदद कर सकता है।

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किस पदार्थ का melting point निश्चित होता है अगर वह pure हो?

Which substance has a definite melting point if it is pure?

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A. शुद्ध पदार्थPure substance

Step 1

Concept

A pure substance can have a sharp melting point. Mixtures may show a melting range.

Step 2

Why this answer is correct

The correct answer is A. शुद्ध पदार्थ / Pure substance. A pure substance can have a sharp melting point. Mixtures may show a melting range.

Step 3

Exam Tip

Pure substance का melting point sharp हो सकता है। Mixtures में melting range मिल सकती है।

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गैसों की compressibility अधिक क्यों होती है?

Why do gases have high compressibility?

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B. उनमें particles के बीच खाली स्थान अधिक हैThere is large empty space between particles

Step 1

Concept

Gas particles are far apart. In compression interparticle space decreases.

Step 2

Why this answer is correct

The correct answer is B. उनमें particles के बीच खाली स्थान अधिक है / There is large empty space between particles. Gas particles are far apart. In compression interparticle space decreases.

Step 3

Exam Tip

Gas particles far apart होते हैं। Compression में interparticle space कम होता है।

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Liquids की compressibility solids से सामान्यतः कैसी होती है?

How is compressibility of liquids generally compared with solids?

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C. थोड़ी अधिक पर gases से कमSlightly more but less than gases

Step 1

Concept

Particles in liquids are slightly farther than in solids. Still compressibility is much less than gases.

Step 2

Why this answer is correct

The correct answer is C. थोड़ी अधिक पर gases से कम / Slightly more but less than gases. Particles in liquids are slightly farther than in solids. Still compressibility is much less than gases.

Step 3

Exam Tip

Liquids में particles solids से थोड़ा अधिक दूर होते हैं। फिर भी gases की तुलना में compressibility बहुत कम होती है।

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किस अवस्था में diffusion सबसे तेज सामान्यतः होता है?

In which state is diffusion generally fastest?

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Correct Answer

D. गैसGas

Step 1

Concept

In gases particles are fast and far apart. Therefore diffusion is fastest.

Step 2

Why this answer is correct

The correct answer is D. गैस / Gas. In gases particles are fast and far apart. Therefore diffusion is fastest.

Step 3

Exam Tip

Gases में particles तेज और दूर-दूर होते हैं। इसलिए diffusion fastest होता है।

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ठोस में diffusion बहुत धीमा क्यों होता है?

Why is diffusion very slow in solids?

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A. कणों की गति सीमित होती हैParticle motion is limited

Step 1

Concept

In solids particles remain near fixed positions. Therefore diffusion is very slow.

Step 2

Why this answer is correct

The correct answer is A. कणों की गति सीमित होती है / Particle motion is limited. In solids particles remain near fixed positions. Therefore diffusion is very slow.

Step 3

Exam Tip

ठोस में particles fixed positions के पास रहते हैं। इसलिए diffusion बहुत slow होता है।

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Gas particles के random motion का परिणाम क्या है?

What is a result of random motion of gas particles?

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A. gas container में फैल जाती हैGas spreads in container

Step 1

Concept

Gas particles spread in available space due to random motion. Therefore gas has no fixed shape.

Step 2

Why this answer is correct

The correct answer is A. gas container में फैल जाती है / Gas spreads in container. Gas particles spread in available space due to random motion. Therefore gas has no fixed shape.

Step 3

Exam Tip

Gas particles random motion के कारण available space में फैलते हैं। इसलिए gas no fixed shape रखती है।

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पदार्थ की अवस्था बदलने पर क्या जरूरी नहीं बदलता?

What does not necessarily change when state of matter changes?

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A. रासायनिक natureChemical nature

Step 1

Concept

State change is a physical change. Chemical identity need not change.

Step 2

Why this answer is correct

The correct answer is A. रासायनिक nature / Chemical nature. State change is a physical change. Chemical identity need not change.

Step 3

Exam Tip

State change physical change है। इसमें chemical identity जरूरी नहीं बदलती।

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बर्फ के पानी बनने पर chemical composition के बारे में सही कथन क्या है?

What is correct about chemical composition when ice becomes water?

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B. composition समान रहती हैComposition remains same

Step 1

Concept

Ice and water are different states of the same substance. This is a physical change.

Step 2

Why this answer is correct

The correct answer is B. composition समान रहती है / Composition remains same. Ice and water are different states of the same substance. This is a physical change.

Step 3

Exam Tip

Ice और water दोनों same substance की अलग states हैं। यह physical change है।

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Steam का water में बदलना किस प्रकार का change है?

Steam changing into water is what type of change?

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C. physical change

Step 1

Concept

Steam becoming water involves only state change. Chemical composition remains the same.

Step 2

Why this answer is correct

The correct answer is C. physical change. Steam becoming water involves only state change. Chemical composition remains the same.

Step 3

Exam Tip

Steam से water बनने में only state change होता है। Chemical composition same रहती है।

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नमक का पानी में घुलना सामान्यतः किस प्रकार का परिवर्तन माना जाता है?

Dissolving salt in water is generally considered what type of change?

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D. भौतिक परिवर्तनPhysical change

Step 1

Concept

Salt can be recovered by evaporation. Therefore it is generally considered a physical change.

Step 2

Why this answer is correct

The correct answer is D. भौतिक परिवर्तन / Physical change. Salt can be recovered by evaporation. Therefore it is generally considered a physical change.

Step 3

Exam Tip

नमक को evaporation से वापस पाया जा सकता है। इसलिए इसे सामान्यतः physical change माना जाता है।

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कागज जलना किस प्रकार का परिवर्तन है?

Burning of paper is what type of change?

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A. रासायनिक परिवर्तनChemical change

Step 1

Concept

New substances form when paper burns. Therefore it is a chemical change.

Step 2

Why this answer is correct

The correct answer is A. रासायनिक परिवर्तन / Chemical change. New substances form when paper burns. Therefore it is a chemical change.

Step 3

Exam Tip

कागज जलने पर नए पदार्थ बनते हैं। इसलिए यह chemical change है।

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भौतिक परिवर्तन में सामान्यतः क्या नहीं बदलता?

What generally does not change in a physical change?

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B. chemical identity

Step 1

Concept

In physical change shape state or size may change. But chemical identity remains same.

Step 2

Why this answer is correct

The correct answer is B. chemical identity. In physical change shape state or size may change. But chemical identity remains same.

Step 3

Exam Tip

Physical change में shape state या size बदल सकता है। पर chemical identity वही रहती है।

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रासायनिक परिवर्तन की पहचान क्या हो सकती है?

What can be an indication of a chemical change?

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C. नया पदार्थ बननाFormation of new substance

Step 1

Concept

In a chemical change new substances can form. Examples are burning and rusting.

Step 2

Why this answer is correct

The correct answer is C. नया पदार्थ बनना / Formation of new substance. In a chemical change new substances can form. Examples are burning and rusting.

Step 3

Exam Tip

Chemical change में new substances बन सकते हैं। जैसे जलना या जंग लगना।

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लोहे में जंग लगना किस प्रकार का परिवर्तन है?

Rusting of iron is what type of change?

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Correct Answer

D. रासायनिक परिवर्तनChemical change

Step 1

Concept

During rusting new substances such as iron oxide form. Therefore it is a chemical change.

Step 2

Why this answer is correct

The correct answer is D. रासायनिक परिवर्तन / Chemical change. During rusting new substances such as iron oxide form. Therefore it is a chemical change.

Step 3

Exam Tip

जंग लगने पर iron oxide जैसे नए substances बनते हैं। इसलिए यह chemical change है।

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मोम का पिघलना किस प्रकार का परिवर्तन है?

Melting of wax is what type of change?

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A. भौतिक परिवर्तनPhysical change

Step 1

Concept

When wax melts only its state changes. Therefore it is a physical change.

Step 2

Why this answer is correct

The correct answer is A. भौतिक परिवर्तन / Physical change. When wax melts only its state changes. Therefore it is a physical change.

Step 3

Exam Tip

मोम पिघलने पर केवल state बदलती है। इसलिए यह physical change है।

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मोमबत्ती का जलना मुख्यतः किस प्रकार का परिवर्तन है?

Burning of a candle is mainly what type of change?

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Correct Answer

B. रासायनिक परिवर्तनChemical change

Step 1

Concept

In candle burning wax reacts and new substances form. Therefore it is a chemical change.

Step 2

Why this answer is correct

The correct answer is B. रासायनिक परिवर्तन / Chemical change. In candle burning wax reacts and new substances form. Therefore it is a chemical change.

Step 3

Exam Tip

Candle burning में wax reacts and new substances form. इसलिए यह chemical change है।

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Level 2 में पदार्थ की अवस्थाओं से जुड़ा मुख्य idea क्या है?

What is the main idea related to states of matter in Level 2?

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C. कणों की दूरी गति और आकर्षण अवस्था तय करते हैंParticle distance motion and attraction decide state

Step 1

Concept

States of matter are understood by particle model. Distance attraction and motion are key factors.

Step 2

Why this answer is correct

The correct answer is C. कणों की दूरी गति और आकर्षण अवस्था तय करते हैं / Particle distance motion and attraction decide state. States of matter are understood by particle model. Distance attraction and motion are key factors.

Step 3

Exam Tip

States of matter को particle model से समझा जाता है। Distance attraction और motion key factors हैं।

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Level 2 Nature of matter का best summary क्या है?

What is the best summary of Level 2 Nature of matter?

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A. ठोस द्रव गैस में कणों की arrangement motion और force अलग होते हैंIn solid liquid gas particle arrangement motion and force differ

Step 1

Concept

Properties of solid liquid and gas are explained by particle arrangement. State changes are mostly physical changes.

Step 2

Why this answer is correct

The correct answer is A. ठोस द्रव गैस में कणों की arrangement motion और force अलग होते हैं / In solid liquid gas particle arrangement motion and force differ. Properties of solid liquid and gas are explained by particle arrangement. State changes are mostly physical changes.

Step 3

Exam Tip

ठोस द्रव और गैस की properties particle arrangement से explain होती हैं। State changes mostly physical changes हैं।

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Class 11 Chemistry Quiz FAQs

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