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class10 MCQ Questions for Class 10

class10 se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

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2107 questions tagged with class10.

Question 511/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

किस युग्म की अभिक्रिया में मुख्य उत्पाद लवण और जल होंगे, पर गैस आवश्यक नहीं बनेगी?

Which pair will mainly form salt and water, but gas is not necessarily formed?

Explanation opens after your attempt
Correct Answer

C. अम्ल और क्षारAcid and base

Step 1

Concept

The reaction between an acid and a base is called neutralisation.

Step 2

Why this answer is correct

It generally forms salt and water.

Step 3

Exam Tip

Gas formation is common in acid-carbonate reactions.

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Question 512/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

किस युग्म में अम्ल और कार्बोनेट की अभिक्रिया से लवण, जल और कार्बन डाइऑक्साइड बनेंगे?

Which pair will react to form salt, water and carbon dioxide?

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Correct Answer

A. हाइड्रोक्लोरिक अम्ल और सोडियम कार्बोनेटHydrochloric acid and sodium carbonate

Step 1

Concept

Acid and carbonate reaction produces carbon dioxide.

Step 2

Why this answer is correct

Salt and water are also formed.

Step 3

Exam Tip

Hydrochloric acid and sodium carbonate are the correct example.

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Question 513/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

क्षारीय विलयन में जल मिलाने पर हाइड्रॉक्साइड आयनों की प्रति इकाई आयतन संख्या घटती है। इसका पीएच पर क्या प्रभाव होगा?

When water is added to a basic solution, the number of hydroxide ions per unit volume decreases. What will be the effect on pH?

Explanation opens after your attempt
Correct Answer

B. पीएच सात की ओर घटेगाpH will decrease towards 7

Step 1

Concept

Basicity is related to hydroxide ions.

Step 2

Why this answer is correct

Adding water decreases hydroxide ions per unit volume.

Step 3

Exam Tip

Basicity decreases and pH moves towards 7.

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Question 514/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

अम्लीय विलयन में जल मिलाने पर हाइड्रोजन आयनों की प्रति इकाई आयतन संख्या घटती है। इसका पीएच पर क्या प्रभाव होगा?

When water is added to an acidic solution, the number of hydrogen ions per unit volume decreases. What will be the effect on pH?

Explanation opens after your attempt
Correct Answer

A. पीएच बढ़ेगाpH will increase

Step 1

Concept

Acidity is related to hydrogen ions.

Step 2

Why this answer is correct

Adding water decreases hydrogen ions per unit volume.

Step 3

Exam Tip

Acidity decreases and pH increases.

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Question 515/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

सार्वत्रिक सूचक किसी विलयन में बैंगनी रंग दिखाता है। यह किस ओर संकेत करता है?

A universal indicator shows violet colour in a solution. What does this indicate?

Explanation opens after your attempt
Correct Answer

C. तीव्र क्षारीयताStrong basicity

Step 1

Concept

Universal indicator changes colour according to pH.

Step 2

Why this answer is correct

Violet indicates high pH and strong basicity.

Step 3

Exam Tip

A pH greater than 7 indicates a basic solution.

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Question 516/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

सार्वत्रिक सूचक किसी विलयन में नारंगी रंग दिखाता है। विलयन की प्रकृति क्या हो सकती है?

A universal indicator shows orange colour in a solution. What could be the nature of the solution?

Explanation opens after your attempt
Correct Answer

A. अम्लीयAcidic

Step 1

Concept

Universal indicator gives a pH clue through colour.

Step 2

Why this answer is correct

Orange colour indicates an acidic range.

Step 3

Exam Tip

Green indicates neutrality.

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Question 517/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

यदि किसी पदार्थ का विलयन स्पर्श में साबुन जैसा है और लाल लिटमस नीला करता है, तो वह किस प्रकार का होगा?

If a substance solution feels soapy and turns red litmus blue, what type is it?

Explanation opens after your attempt
Correct Answer

B. क्षारीयBasic

Step 1

Concept

Bases may feel soapy.

Step 2

Why this answer is correct

Bases turn red litmus blue.

Step 3

Exam Tip

Unknown substances should not be touched directly.

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Question 518/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

यदि किसी पदार्थ का जलीय विलयन खट्टा स्वाद रखता है और नीला लिटमस लाल करता है, तो वह किस श्रेणी में आएगा?

If an aqueous solution of a substance tastes sour and turns blue litmus red, which category does it belong to?

Explanation opens after your attempt
Correct Answer

A. अम्लAcid

Step 1

Concept

Sour taste is a common property of acids.

Step 2

Why this answer is correct

Turning blue litmus red is also a property of acids.

Step 3

Exam Tip

In the laboratory, substances should not be tested by taste.

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Question 519/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

हल्दी का दाग साबुन लगाने पर लाल भूरा हो जाता है। यह साबुन के किस स्वभाव का संकेत है?

A turmeric stain becomes reddish brown when soap is applied. This indicates which nature of soap?

Explanation opens after your attempt
Correct Answer

B. क्षारीय स्वभावBasic nature

Step 1

Concept

Turmeric is a natural indicator.

Step 2

Why this answer is correct

It becomes reddish brown in a basic medium.

Step 3

Exam Tip

Soap solution is generally basic.

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Question 520/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

घ्राण सूचक अम्ल और क्षार में किस परिवर्तन के आधार पर संकेत देते हैं?

Olfactory indicators give signals in acids and bases based on what change?

Explanation opens after your attempt
Correct Answer

A. गंध में परिवर्तनChange in smell

Step 1

Concept

Olfactory indicators work based on smell.

Step 2

Why this answer is correct

Their smell can change in acidic or basic media.

Step 3

Exam Tip

Onion and vanilla are examples.

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Question 521/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

सांद्र अम्ल को पतला करने की सुरक्षित विधि कौन सी है?

What is the safe method for diluting concentrated acid?

Explanation opens after your attempt
Correct Answer

B. अम्ल को धीरे-धीरे जल में डालनाAdd acid slowly to water

Step 1

Concept

Dissolving acid in water can release a lot of heat.

Step 2

Why this answer is correct

Adding water to acid can cause splashing.

Step 3

Exam Tip

Therefore, acid should be added slowly to water.

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Question 522/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

अम्ल को जल में घोलते समय पात्र गरम क्यों हो जाता है?

Why does the container become hot when acid is dissolved in water?

Explanation opens after your attempt
Correct Answer

A. क्योंकि ऊष्मा निकलती हैBecause heat is released

Step 1

Concept

Dissolving acid in water is an exothermic process.

Step 2

Why this answer is correct

Heat is released during this process.

Step 3

Exam Tip

Therefore, the container may feel hot.

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Question 523/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

अम्लीय वर्षा का जल जलीय जीवों के लिए कब अधिक हानिकारक हो सकता है?

When can acid rain water be more harmful to aquatic organisms?

Explanation opens after your attempt
Correct Answer

A. जब जल का पीएच बहुत घट जाएWhen the pH of water decreases greatly

Step 1

Concept

Aquatic organisms survive within a suitable pH range.

Step 2

Why this answer is correct

Acid rain can lower water pH.

Step 3

Exam Tip

Very low pH is harmful to aquatic life.

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Question 524/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

अम्लीय वर्षा में संगमरमर की मूर्तियों को क्षति क्यों होती है?

Why are marble statues damaged by acid rain?

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Correct Answer

A. संगमरमर में कैल्शियम कार्बोनेट होता है जो अम्ल से अभिक्रिया करता हैMarble contains calcium carbonate, which reacts with acid

Step 1

Concept

Marble contains calcium carbonate.

Step 2

Why this answer is correct

Acids can react with carbonates.

Step 3

Exam Tip

Therefore, acid rain slowly damages marble.

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Question 525/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

शर्करा का जलीय विलयन बल्ब नहीं जलाता, जबकि अम्लीय विलयन जलाता है। सही कारण क्या है?

An aqueous sugar solution does not make a bulb glow, while an acidic solution does. What is the correct reason?

Explanation opens after your attempt
Correct Answer

A. शर्करा विलयन में चलायमान आयन नहीं बनतेMobile ions are not formed in sugar solution

Step 1

Concept

Electric current needs mobile ions.

Step 2

Why this answer is correct

Acids form ions in water, but sugar generally does not.

Step 3

Exam Tip

Therefore, acid solution conducts while sugar solution may not.

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Question 526/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

समान सांद्रता वाले हाइड्रोक्लोरिक अम्ल और एथेनोइक अम्ल में विद्युत चालकता किसकी अधिक होगी?

Between equal concentration solutions of hydrochloric acid and ethanoic acid, which will have higher electrical conductivity?

Explanation opens after your attempt
Correct Answer

A. हाइड्रोक्लोरिक अम्लHydrochloric acid

Step 1

Concept

Hydrochloric acid is a strong acid.

Step 2

Why this answer is correct

It produces more ions in water.

Step 3

Exam Tip

More ions lead to higher electrical conductivity.

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Question 527/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

प्रबल अम्ल और सांद्र अम्ल के बारे में कौन सा कथन सही है?

Which statement about a strong acid and a concentrated acid is correct?

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Correct Answer

B. प्रबलता आयनीकरण से और सांद्रता मात्रा से संबंधित हैStrength is related to ionisation and concentration is related to amount

Step 1

Concept

Strength tells how much an acid ionises in water.

Step 2

Why this answer is correct

Concentration tells how much acid is present in the solution.

Step 3

Exam Tip

These two ideas are different.

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Question 528/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

जिप्सम को नियंत्रित रूप से गरम करने पर प्लास्टर ऑफ पेरिस बनता है। इसमें मुख्य परिवर्तन किससे जुड़ा है?

Plaster of Paris is formed by controlled heating of gypsum. The main change is related to what?

Explanation opens after your attempt
Correct Answer

A. क्रिस्टलीय जल की मात्रा में परिवर्तनChange in the amount of water of crystallisation

Step 1

Concept

Gypsum is hydrated calcium sulphate.

Step 2

Why this answer is correct

Controlled heating removes part of its water of crystallisation.

Step 3

Exam Tip

This forms plaster of Paris.

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Question 529/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

प्लास्टर ऑफ पेरिस को नमी से दूर रखने का सबसे सही कारण क्या है?

What is the most correct reason for keeping plaster of Paris away from moisture?

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Correct Answer

A. नमी मिलने पर यह जम सकता हैIt can set on absorbing moisture

Step 1

Concept

Plaster of Paris reacts with water and becomes hard.

Step 2

Why this answer is correct

Moisture can make it set before use.

Step 3

Exam Tip

Therefore, it should be stored in a dry closed container.

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Question 530/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

सफेद निर्जल कॉपर सल्फेट जल की उपस्थिति में नीला हो जाता है। यह किस परीक्षण में उपयोगी है?

White anhydrous copper sulphate turns blue in the presence of water. In which test is this useful?

Explanation opens after your attempt
Correct Answer

A. जल की उपस्थिति की पहचानTest for presence of water

Step 1

Concept

Anhydrous copper sulphate is white.

Step 2

Why this answer is correct

It turns blue when water is present.

Step 3

Exam Tip

Therefore, it is used to test the presence of water.

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Question 531/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

नीले कॉपर सल्फेट को गरम करने पर सफेद ठोस बनता है। यह परिवर्तन किसके निकलने के कारण होता है?

When blue copper sulphate is heated, a white solid is formed. This change occurs due to the loss of what?

Explanation opens after your attempt
Correct Answer

A. क्रिस्टलीय जलWater of crystallisation

Step 1

Concept

Blue copper sulphate contains water of crystallisation.

Step 2

Why this answer is correct

On heating, this water is lost.

Step 3

Exam Tip

Therefore, the blue colour changes to white.

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Question 532/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

जिंक ऑक्साइड को उभयधर्मी क्यों कहा जाता है?

Why is zinc oxide called amphoteric?

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Correct Answer

A. क्योंकि यह अम्ल और क्षार दोनों से अभिक्रिया कर सकता हैBecause it can react with both acids and bases

Step 1

Concept

An amphoteric substance can show both types of behaviour.

Step 2

Why this answer is correct

Zinc oxide can react with acids as well as bases.

Step 3

Exam Tip

Therefore, it is called an amphoteric oxide.

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Question 533/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

कौन सा ऑक्साइड अम्ल और क्षार दोनों से अभिक्रिया कर सकता है?

Which oxide can react with both acids and bases?

Explanation opens after your attempt
Correct Answer

C. उभयधर्मी ऑक्साइडAmphoteric oxide

Step 1

Concept

Some oxides can react with both acids and bases.

Step 2

Why this answer is correct

Such oxides are called amphoteric oxides.

Step 3

Exam Tip

Aluminium oxide and zinc oxide are examples.

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Question 534/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

अधातु ऑक्साइड जल में अम्लीय विलयन बना सकते हैं। इनमें से कौन सा इसका उदाहरण है?

Non-metal oxides can form acidic solutions in water. Which of the following is an example?

Explanation opens after your attempt
Correct Answer

C. कार्बन डाइऑक्साइडCarbon dioxide

Step 1

Concept

Carbon is a non-metal.

Step 2

Why this answer is correct

Carbon dioxide can form carbonic acid in water.

Step 3

Exam Tip

Therefore, it is an example of an acidic oxide.

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Question 535/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

धातु ऑक्साइड का अम्ल से अभिक्रिया करके लवण और जल बनाना किस स्वभाव को दर्शाता है?

A metal oxide reacts with an acid to form salt and water. Which nature does this show?

Explanation opens after your attempt
Correct Answer

B. क्षारीय स्वभावBasic nature

Step 1

Concept

Bases react with acids to form salt and water.

Step 2

Why this answer is correct

Metal oxides show similar behaviour with acids.

Step 3

Exam Tip

Therefore, most metal oxides are called basic oxides.

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Question 536/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

सोडियम क्लोराइड का विलयन सामान्यतः उदासीन क्यों माना जाता है?

Why is sodium chloride solution generally considered neutral?

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Correct Answer

B. क्योंकि यह प्रबल अम्ल और प्रबल क्षार से बना हैBecause it is made from a strong acid and a strong base

Step 1

Concept

Sodium chloride is formed from hydrochloric acid and sodium hydroxide.

Step 2

Why this answer is correct

Both are strong.

Step 3

Exam Tip

Therefore, its solution is nearly neutral.

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Question 537/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

सोडियम कार्बोनेट का विलयन लाल लिटमस को नीला कर सकता है। यह किस प्रकार का लवण है?

A sodium carbonate solution can turn red litmus blue. What type of salt is it?

Explanation opens after your attempt
Correct Answer

A. कमजोर अम्ल और प्रबल क्षार से बना लवणSalt of a weak acid and a strong base

Step 1

Concept

Sodium carbonate solution shows basic nature.

Step 2

Why this answer is correct

It is an example of a salt of a weak acid and a strong base.

Step 3

Exam Tip

Therefore, it can turn red litmus blue.

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Question 538/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

अमोनियम क्लोराइड का जलीय विलयन नीले लिटमस को लाल कर सकता है। इसका कारण क्या है?

An aqueous solution of ammonium chloride can turn blue litmus red. What is the reason?

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B. यह प्रबल अम्ल और कमजोर क्षार से बने लवण का उदाहरण हैIt is an example of a salt made from a strong acid and a weak base

Step 1

Concept

Ammonium chloride is considered a salt of a strong acid and a weak base.

Step 2

Why this answer is correct

Such a salt can give an acidic solution.

Step 3

Exam Tip

Therefore, it can turn blue litmus red.

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Question 539/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

यदि किसी लवण का विलयन नीले लिटमस पर कोई प्रभाव नहीं डालता और लाल लिटमस पर भी कोई प्रभाव नहीं डालता, तो उसका पीएच लगभग कितना हो सकता है?

If a salt solution has no effect on both blue and red litmus, what may be its approximate pH?

Explanation opens after your attempt
Correct Answer

B. सात7

Step 1

Concept

No effect on both litmus papers may indicate neutrality.

Step 2

Why this answer is correct

A neutral solution has pH around 7.

Step 3

Exam Tip

Pure water and common salt solution can be examples.

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Question 540/2107 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 11

क्लोर क्षार प्रक्रिया में प्राप्त तीन मुख्य उत्पादों का सही समूह कौन सा है?

Which is the correct group of three main products obtained in the chlor-alkali process?

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Correct Answer

A. क्लोरीन, हाइड्रोजन और सोडियम हाइड्रॉक्साइडChlorine, hydrogen and sodium hydroxide

Step 1

Concept

The chlor-alkali process involves electrolysis of brine.

Step 2

Why this answer is correct

It produces chlorine, hydrogen and sodium hydroxide.

Step 3

Exam Tip

All three are industrially useful substances.

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