Q18
1 markMCQSection A

Assertion (A): Concentrated nitric acid is diluted by adding water slowly to acid with constant stirring.

Reason (R): Concentrated nitric acid is easily soluble in water.

Acids, Bases and Salts
Acids, Bases and Salts

Options

(a)Both, Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
(b)Both, Assertion (A) and Reason (R) are true, and Reason (R) is not the correct explanation of Assertion (A).
(c)Assertion (A) is true, but Reason (R) is false.
(d)Assertion (A) is false, but Reason (R) is true.
Official Answer

Assertion (A) is true, but Reason (R) is false.

dilutionexothermic process

Hint

Dilution of concentrated nitric acid is an exothermic process.

Quick Oral Answer

Concentrated nitric acid is diluted by adding water slowly to acid with constant stirring to prevent excessive heat generation and splashing of the mixture.

Analysis & Explanation

Concentrated nitric acid is diluted by adding water slowly to acid with constant stirring to prevent excessive heat generation and splashing of the mixture. This is because the process of dissolving an acid in water is highly exothermic.

Common Mistakes

  1. 1Both, Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
  2. 2Both, Assertion (A) and Reason (R) are true, and Reason (R) is not the correct explanation of Assertion (A).
  3. 3Assertion (A) is false, but Reason (R) is true.

Interesting Facts

The process of dissolving an acid in water is highly exothermic.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2025?

This question carries 1 mark in the CBSE Class 10 Science 2025 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Acids, Bases and Salts" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Acids, Bases and Salts" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2025 paper?

This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.