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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 651/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

एक विलयन का पीएच मान दो है और दूसरे का पीएच मान पाँच है। दोनों अम्लीय हैं। अधिक संक्षारक होने की संभावना किसमें अधिक होगी?

One solution has pH 2 and another has pH 5. Both are acidic. Which one is more likely to be more corrosive?

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Correct Answer

A. पीएच दो वाला विलयनSolution with pH 2

Step 1

Concept

Lower pH shows greater acidity.

Step 2

Why this answer is correct

pH 2 is more acidic than pH 5.

Step 3

Exam Tip

A more acidic solution can be more corrosive, so it must be handled carefully.

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Question 652/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

किसी विलयन में सार्वत्रिक सूचक डालने पर रंग हरा दिखाई देता है। विलयन की प्रकृति क्या होगी?

When universal indicator is added to a solution, the colour appears green. What is the nature of the solution?

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Correct Answer

B. उदासीनNeutral

Step 1

Concept

Universal indicator gives different colours at different pH values.

Step 2

Why this answer is correct

Green usually indicates a neutral solution.

Step 3

Exam Tip

A neutral solution has pH close to 7.

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Question 653/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

किसी अज्ञात विलयन में जस्ता डालने पर गैस निकलती है और वह गैस जलती तिल्ली के पास चटाक ध्वनि देती है। विलयन की प्रकृति क्या हो सकती है?

When zinc is added to an unknown solution, a gas is released and it gives a pop sound near a burning splint. What could be the nature of the solution?

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Correct Answer

B. अम्लीय विलयनAcidic solution

Step 1

Concept

Reactive metals like zinc react with acids.

Step 2

Why this answer is correct

This reaction produces hydrogen gas.

Step 3

Exam Tip

Hydrogen gives a pop sound near a burning splint.

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Question 654/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

एक छात्र ने सोडियम कार्बोनेट में अम्ल मिलाया। गैस निकली और चूने का पानी दूधिया हो गया। गैस कौन सी थी?

A student added acid to sodium carbonate. A gas was released and lime water turned milky. Which gas was it?

Explanation opens after your attempt
Correct Answer

D. कार्बन डाइऑक्साइडCarbon dioxide

Step 1

Concept

Acids react with carbonates to produce carbon dioxide.

Step 2

Why this answer is correct

Carbon dioxide turns lime water milky.

Step 3

Exam Tip

This is an important test for gas identification.

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Question 655/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

यदि अम्लीय विलयन में क्षार धीरे-धीरे मिलाया जाए, तो सार्वत्रिक सूचक का रंग किस दिशा में बदल सकता है?

If a base is slowly added to an acidic solution, in which direction can the colour of universal indicator change?

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Correct Answer

A. अधिक अम्लीय रंगों से उदासीन रंग की ओरFrom more acidic colours towards neutral colour

Step 1

Concept

Adding a base reduces acidity.

Step 2

Why this answer is correct

The pH moves towards 7.

Step 3

Exam Tip

Therefore, the indicator colour can move from acidic colours towards a neutral colour.

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Question 656/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

जल में घुलने पर कौन सा पदार्थ अम्लीय गुण दिखाने के लिए हाइड्रोजन आयन उपलब्ध कराता है?

Which substance provides hydrogen ions to show acidic properties when dissolved in water?

Explanation opens after your attempt
Correct Answer

B. हाइड्रोजन क्लोराइडHydrogen chloride

Step 1

Concept

Acids give hydrogen ions in water.

Step 2

Why this answer is correct

Hydrogen chloride dissolves in water to form hydrochloric acid.

Step 3

Exam Tip

Ion formation in water is necessary for acidic behaviour.

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Question 657/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

निम्न में से कौन सा कथन क्षार के लिए सही है?

Which of the following statements is correct for a base?

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Correct Answer

C. यह जल में हाइड्रॉक्साइड आयन दे सकता हैIt can give hydroxide ions in water

Step 1

Concept

Bases give hydroxide ions in water.

Step 2

Why this answer is correct

These ions make the solution basic in nature.

Step 3

Exam Tip

A basic solution generally has pH greater than 7.

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Question 658/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

किस स्थिति में किसी लवण का विलयन क्षारीय हो सकता है?

In which condition can a salt solution be basic?

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Correct Answer

B. जब लवण कमजोर अम्ल और प्रबल क्षार से बनेWhen the salt is made from a weak acid and a strong base

Step 1

Concept

The nature of a salt depends on its parent acid and base.

Step 2

Why this answer is correct

A salt of a weak acid and a strong base can be basic.

Step 3

Exam Tip

Sodium carbonate is an example.

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Question 659/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

किस स्थिति में किसी लवण का विलयन अम्लीय हो सकता है?

In which condition can a salt solution be acidic?

Explanation opens after your attempt
Correct Answer

A. प्रबल अम्ल और कमजोर क्षार से बने लवण मेंIn a salt made from a strong acid and a weak base

Step 1

Concept

A salt made from a strong acid and a weak base can give an acidic solution.

Step 2

Why this answer is correct

Ammonium chloride is a common example.

Step 3

Exam Tip

Understand salt pH through its parent substances.

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Question 660/1900 Medium Science Chemical Substances – Nature and Behaviour Acids, Bases, and Salts Class 10 Level 10

किस जोड़ी से बनने वाला लवण सामान्यतः उदासीन विलयन दे सकता है?

Which pair can generally form a salt that gives a neutral solution?

Explanation opens after your attempt
Correct Answer

C. प्रबल अम्ल और प्रबल क्षारStrong acid and strong base

Step 1

Concept

Salts of strong acids and strong bases are generally neutral.

Step 2

Why this answer is correct

Sodium chloride is such a salt.

Step 3

Exam Tip

Its aqueous solution has pH close to 7.

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