Q22
1 markMCQSection B

Study the following table and select the correct option:

Chemical Reactions and Equations
Salts and their Nature

Options

(A)Salt: NaCl, Acid: HCl, Base: NaOH, Nature: Basic
(B)Salt: Na2CO3Na_2CO_3, Acid: H2CO3H_2CO_3, Base: NaOH, Nature: Neutral
(C)Salt: Na2SO4Na_2SO_4, Acid: H2SO4H_2SO_4, Base: NaOH, Nature: Acidic
(D)Salt: CH3COONaCH_3COONa, Acid: CH3COOHCH_3COOH, Base: NaOH, Nature: Basic
Official Answer

Option D is correct: Salt: CH3COONaCH_3COONa, Acid: CH3COOHCH_3COOH, Base: NaOHNaOH, Nature: Basic.

Strong baseWeak acidBasic saltSodium acetate

Marking Scheme

  • 11 mark for identifying the correct combination of acid, base, and salt nature.

Hint

Recall that a salt formed from a strong base and a weak acid results in a basic solution.

Quick Oral Answer

The salt CH3COONaCH_3COONa is basic because it is derived from NaOHNaOH, which is a strong base, and CH3COOHCH_3COOH, which is a weak acid.

Analysis & Explanation

In chemistry, the nature of a salt depends on the strength of the parent acid and base. (A) NaClNaCl is formed from a strong acid (HClHCl) and a strong base (NaOHNaOH), making it neutral, not basic. (B) Na2CO3Na_2CO_3 is formed from a weak acid (H2CO3H_2CO_3) and a strong base (NaOHNaOH), making it basic, not neutral. (C) Na2SO4Na_2SO_4 is formed from a strong acid (H2SO4H_2SO_4) and a strong base (NaOHNaOH), making it neutral, not acidic. (D) CH3COONaCH_3COONa is formed from a weak acid (CH3COOHCH_3COOH) and a strong base (NaOHNaOH); since the base is strong, the resulting salt is basic in nature.

Common Mistakes

  1. 1Assuming all sodium salts are neutral.
  2. 2Confusing the strength of acetic acid with mineral acids.

Interesting Facts

Sodium acetate (CH3COONaCH_3COONa) is often used in heating pads because its crystallization is exothermic.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2026?

This question carries 1 mark in the CBSE Class 10 Science 2026 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Chemical Reactions and Equations" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Salts and their Nature" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2026 paper?

This is a MCQ question from Section B in the CBSE Class 10 Science 2026 paper.