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Juice of tamarind turns blue… (Class 10 Science 2024, Q2)

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ScienceCBSE Class 10 · Board exam 2024, set 31/2/1 · 1 mark · MCQ

CBSE Class 10 Science 2024: question 2

Set in the CBSE Class 10 board exam of 2024, paper 31/2/1, section A, question 2, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q2 · 1 mark · MCQAcids, Bases and Salts

Juice of tamarind turns blue litmus to red. It is because of the presence of an acid called :

  1. (A)methanoic acid
  2. (B)acetic acid
  3. (C)tartaric acid
  4. (D)oxalic acid

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 31/2/1.

Hints

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

Hint 1

Recall the table of natural sources of acids in NCERT.

Hint 2

Vinegar has acetic acid and tomato has oxalic acid. Which acid is left for tamarind?

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. Blue litmus turning red shows that tamarind juice is acidic.

  2. The natural acid found in tamarind is tartaric acid. Methanoic acid is in ant stings, acetic acid in vinegar and oxalic acid in tomato. Option (C) is correct.

    1 mark

Answer: Tartaric acid: option (C)

Where the marks are

  • Identifies tartaric acid, option (C) (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 paper2024 board paper, set 31/2/1: 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.