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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 611/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

किस पदार्थ को जल में घोलने पर हाइड्रॉक्साइड आयनों की मात्रा बढ़ती है?

Which substance increases the amount of hydroxide ions when dissolved in water?

Explanation opens after your attempt
Correct Answer

C. सोडियम हाइड्रॉक्साइडSodium hydroxide

Step 1

Concept

Bases produce hydroxide ions in water.

Step 2

Why this answer is correct

Sodium hydroxide is a strong base.

Step 3

Exam Tip

Remember hydrogen ions for acids and hydroxide ions for bases.

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Question 612/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

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

Which statement about dilute acid and concentrated acid is correct?

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Correct Answer

A. तनु अम्ल में प्रति मात्रा विलयन में अम्ल कम होता हैDilute acid has less acid per amount of solution

Step 1

Concept

Dilute and concentrated describe the amount of solute in a solution.

Step 2

Why this answer is correct

A dilute acid has less acid per amount of solution.

Step 3

Exam Tip

Strength and concentration are different ideas.

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Question 613/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

प्रबल अम्ल और कमजोर अम्ल का अंतर मुख्यतः किस पर आधारित है?

The difference between a strong acid and a weak acid is mainly based on what?

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Correct Answer

B. जल में आयनीकरण की मात्रा परDegree of ionisation in water

Step 1

Concept

Strong acids ionise almost completely in water.

Step 2

Why this answer is correct

Weak acids ionise only partially in water.

Step 3

Exam Tip

So the difference is based on degree of ionisation.

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Question 614/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

सिरका और हाइड्रोक्लोरिक अम्ल की समान सांद्रता वाले विलयनों में कौन अधिक आयन दे सकता है?

Between equal concentration solutions of vinegar acid and hydrochloric acid, which can produce more ions?

Explanation opens after your attempt
Correct Answer

B. हाइड्रोक्लोरिक अम्लHydrochloric acid

Step 1

Concept

Hydrochloric acid is a strong acid.

Step 2

Why this answer is correct

Acetic acid in vinegar is a weak acid and ionises less.

Step 3

Exam Tip

At the same concentration, a strong acid can produce more ions.

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Question 615/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

अम्लीय वर्षा जल के स्रोतों में सल्फर डाइऑक्साइड और नाइट्रोजन ऑक्साइड का क्या योगदान होता है?

What role do sulphur dioxide and nitrogen oxides play in acid rain?

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Correct Answer

A. वे जल में मिलकर अम्ल बना सकते हैंThey can combine with water to form acids

Step 1

Concept

Sulphur dioxide and nitrogen oxides can react with water in the atmosphere.

Step 2

Why this answer is correct

They form acids that lower the pH of rainwater.

Step 3

Exam Tip

Low-pH rain can harm the environment.

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Question 616/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

किस स्थिति में नदी या झील के जीवों को अम्लीय वर्षा से अधिक खतरा होगा?

In which condition will aquatic organisms in a river or lake be at greater risk from acid rain?

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Correct Answer

A. जब जल का पीएच बहुत कम हो जाएWhen the pH of water becomes very low

Step 1

Concept

Aquatic organisms survive well only within a suitable pH range.

Step 2

Why this answer is correct

Acid rain can lower the pH of water bodies.

Step 3

Exam Tip

Very low pH can be harmful to aquatic life.

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Question 617/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

क्लोर क्षार प्रक्रिया में नमकीन जल के विद्युत अपघटन पर धनाग्र और ऋणाग्र पर बनने वाली गैसों का सही क्रम कौन सा है?

In the electrolysis of brine in the chlor-alkali process, what is the correct order of gases formed at anode and cathode?

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Correct Answer

B. धनाग्र पर क्लोरीन, ऋणाग्र पर हाइड्रोजनChlorine at anode, hydrogen at cathode

Step 1

Concept

The chlor-alkali process is electrolysis of brine.

Step 2

Why this answer is correct

Chlorine is formed at the anode and hydrogen at the cathode.

Step 3

Exam Tip

Sodium hydroxide remains in the solution.

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Question 618/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

क्लोर क्षार प्रक्रिया को यह नाम क्यों दिया गया है?

Why is the chlor-alkali process given this name?

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Correct Answer

A. क्योंकि इससे क्लोरीन और क्षार बनते हैंBecause chlorine and an alkali are produced

Step 1

Concept

Chlorine gas is produced in this process.

Step 2

Why this answer is correct

An alkali, sodium hydroxide, is also produced.

Step 3

Exam Tip

Therefore, the name contains both chlor and alkali.

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Question 619/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

विरंजक चूर्ण को खुले वातावरण में लंबे समय तक रखने से उसकी गुणवत्ता क्यों घट सकती है?

Why can the quality of bleaching powder decrease if it is kept exposed to air for a long time?

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Correct Answer

A. क्योंकि वह धीरे-धीरे उपयोगी क्लोरीन खो सकता हैBecause it can gradually lose available chlorine

Step 1

Concept

Bleaching powder is useful due to its available chlorine property.

Step 2

Why this answer is correct

On exposure to air, this property can decrease.

Step 3

Exam Tip

Hence it should be stored in a closed and dry container.

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Question 620/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 9

बेकिंग पाउडर में उपस्थित खाद्य अम्ल का मुख्य कार्य क्या है?

What is the main role of the edible acid present in baking powder?

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Correct Answer

A. बेकिंग सोडा से बने क्षारीय प्रभाव को कम करनाTo reduce the basic effect produced by baking soda

Step 1

Concept

Baking soda can form a basic substance on heating.

Step 2

Why this answer is correct

The edible acid reduces this basic effect and balances taste.

Step 3

Exam Tip

This is why baking powder is different from and more useful than baking soda for baking.

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