Question 181 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.

Answer keywords: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.

Common mistakes

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

Analysis and 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.

Interesting facts

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

Question details

Q18 of 39 questions

Board
CBSE
Class
Class 10
Subject
Science
Year
2025
Section
Section A
Marks
1
Type
MCQ
Chapter
Acids, Bases and Salts
Topic
Acids, Bases and Salts
Bloom's level
Understanding
Syllabus topic
Chemical Properties of Acids and Bases

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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.