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Science Acids, Bases, and Salts MCQ Questions for Class 10

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Acids, Bases, and Salts Practice Questions

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Question 561/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

चार विलयनों के पीएच मान दो, छह, सात और बारह हैं। इनमें सबसे अधिक क्षारीय विलयन कौन सा है?

Four solutions have pH values 2, 6, 7 and 12. Which one is the most basic?

Explanation opens after your attempt
Correct Answer

C. पीएच बारह वाला विलयनSolution with pH 12

Step 1

Concept

A pH greater than 7 indicates a basic solution.

Step 2

Why this answer is correct

Among the given values, pH 12 shows the strongest basic nature.

Step 3

Exam Tip

Higher pH means more basic character.

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Question 562/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

चार विलयनों के पीएच मान एक, चार, आठ और तेरह हैं। इनमें सबसे अधिक अम्लीय विलयन कौन सा है?

Four solutions have pH values 1, 4, 8 and 13. Which one is the most acidic?

Explanation opens after your attempt
Correct Answer

D. पीएच एक वाला विलयनSolution with pH 1

Step 1

Concept

Lower pH indicates higher acidity.

Step 2

Why this answer is correct

Among the given values, pH 1 is the lowest, so it is the most acidic.

Step 3

Exam Tip

Compare pH values carefully in such questions.

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Question 563/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

दूध के खट्टा होने पर उसका पीएच मान किस दिशा में बदलता है?

When milk turns sour, in which direction does its pH change?

Explanation opens after your attempt
Correct Answer

A. पीएच घटता हैpH decreases

Step 1

Concept

When milk turns sour, acidic substances increase.

Step 2

Why this answer is correct

More acidity lowers the pH value.

Step 3

Exam Tip

Connect sour taste with acidic nature for exams.

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Question 564/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

टमाटर के रस, साबुन के विलयन, शुद्ध जल और बेकिंग सोडा विलयन में उदासीन पदार्थ कौन सा होगा?

Among tomato juice, soap solution, pure water and baking soda solution, which substance will be neutral?

Explanation opens after your attempt
Correct Answer

B. शुद्ध जलPure water

Step 1

Concept

A neutral substance has a pH of about 7.

Step 2

Why this answer is correct

Pure water is generally considered neutral.

Step 3

Exam Tip

Tomato juice is acidic, while soap and baking soda solutions are basic.

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Question 565/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

मधुमक्खी के डंक में अम्लीय पदार्थ होता है। उसके दर्द को कम करने के लिए कौन सा पदार्थ उपयुक्त होगा?

A bee sting contains an acidic substance. Which substance is suitable to reduce its pain?

Explanation opens after your attempt
Correct Answer

C. सोडियम हाइड्रोजन कार्बोनेट का विलयनSodium hydrogen carbonate solution

Step 1

Concept

A basic substance can reduce the effect of an acidic sting.

Step 2

Why this answer is correct

Sodium hydrogen carbonate is mildly basic and neutralises the acid.

Step 3

Exam Tip

This is a daily-life example of neutralisation.

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Question 566/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

बिच्छू बूटी के डंक में अम्लीय प्रभाव को कम करने के लिए किस प्रकार का पदार्थ उपयोगी होगा?

Which type of substance is useful to reduce the acidic effect of a nettle sting?

Explanation opens after your attempt
Correct Answer

D. हल्का क्षारMild base

Step 1

Concept

Nettle stings can cause irritation due to acidic substances.

Step 2

Why this answer is correct

A mild base can neutralise the acid.

Step 3

Exam Tip

An acidic effect is treated with a suitable base, not another acid.

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Question 567/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

किस स्थिति में पौधों की जड़ों को मिट्टी से पोषक तत्व लेने में कठिनाई हो सकती है?

In which condition may plant roots face difficulty in absorbing nutrients from soil?

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Correct Answer

A. मिट्टी का पीएच बहुत अधिक अम्लीय या बहुत अधिक क्षारीय होSoil pH is highly acidic or highly basic

Step 1

Concept

Plants need a suitable soil pH for proper growth.

Step 2

Why this answer is correct

Highly acidic or highly basic soil can affect nutrient absorption.

Step 3

Exam Tip

This is why farmers treat soil when needed.

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Question 568/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

यदि खेत की मिट्टी बहुत अधिक अम्लीय है, तो उसमें चूना मिलाने से क्या होगा?

If field soil is highly acidic, what happens when lime is added to it?

Explanation opens after your attempt
Correct Answer

B. मिट्टी की अम्लीयता कम होगीSoil acidity decreases

Step 1

Concept

Lime is basic in nature.

Step 2

Why this answer is correct

It reduces the acidity of acidic soil.

Step 3

Exam Tip

This soil treatment is based on neutralisation.

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Question 569/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

दाँतों की सुरक्षा के लिए मंजन सामान्यतः हल्का क्षारीय क्यों बनाया जाता है?

Why is toothpaste generally made mildly basic for tooth protection?

Explanation opens after your attempt
Correct Answer

A. ताकि मुँह में बने अम्ल को निष्क्रिय कर सकेTo neutralise acid formed in the mouth

Step 1

Concept

Bacteria can produce acids after eating.

Step 2

Why this answer is correct

These acids can damage tooth enamel.

Step 3

Exam Tip

Mildly basic toothpaste neutralises the acid and helps protect teeth.

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Question 570/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 8

पेट में अधिक अम्ल बनने पर मैग्नीशियम हाइड्रॉक्साइड जैसी औषधि कैसे सहायता करती है?

How does a medicine like magnesium hydroxide help when excess acid is produced in the stomach?

Explanation opens after your attempt
Correct Answer

B. यह अतिरिक्त अम्ल को निष्क्रिय करती हैIt neutralises excess acid

Step 1

Concept

Magnesium hydroxide is basic in nature.

Step 2

Why this answer is correct

It reacts with excess stomach acid and neutralises it.

Step 3

Exam Tip

Such medicines are called antacids.

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