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(a) Name the acid present in… (Class 10 Science 2026, Q27B)

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ScienceCBSE Class 10 · Board exam 2026, set 31/5/1 · 3 marks · Short answer

CBSE Class 10 Science 2026: question 27(B)

Set in the CBSE Class 10 board exam of 2026, paper 31/5/1, section B, question 27(B), for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q27(B) · 3 marks · Short answerAcids, Bases and Salts

(a) Name the acid present in ant's sting.
(b) Give reason :
(i) While diluting an acid, it is recommended that the acid should be added to water.
(ii) Baking soda is used as an antacid.

  1. (a)

    Name the acid present in ant's sting.

    0 marks
  2. (b)(i)

    Give reason: While diluting an acid, it is recommended that the acid should be added to water.

    0 marks
  3. (b)(ii)

    Give reason: Baking soda is used as an antacid.

    0 marks

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/5/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

The acid's name comes from the Latin word for ant, 'formica'.

Hint 2

Dilution of acid releases a lot of heat; think of where that heat goes in each order of mixing.

Hint 3

Is baking soda acidic or basic?

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. (a) Ant sting contains methanoic acid (formic acid), HCOOH.

    1 mark

  2. (b)(i) Mixing acid with water is highly exothermic. Adding acid slowly to a large amount of water spreads the heat, so there is no excessive local heating, splashing or burns; adding water to acid can boil the mixture and break the container.

    1 mark

  3. (b)(ii) Baking soda (NaHCO₃) is a mild base; it neutralises the excess acid in the stomach and gives relief from acidity.

    1 mark

Answer: (a) Methanoic (formic) acid; (b)(i) avoids excessive local heating and splashing; (ii) mild alkali neutralises excess stomach acid.

Where the marks are

  • Names methanoic acid (1 mark)
  • Reason for adding acid to water – heat/splashing (1 mark)
  • Baking soda neutralises excess acid (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Acids, Bases and Salts, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 31/5/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.