Question

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Answer 1

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☞︎︎︎ 1. Which of following sets of substances contain acids ?

Answer → Curd nd Vinegar✔

$\huge \underline \bold \red {Reason}$

➠Curd contains lactic acid and vinegar contains acetic acid. Lime water, soap, and milk of magnesia are basic substances and grapes contain tartaric acid.

☞︎︎︎ 2. Which of the following is an acid - base indicator ?

Answer → Turmeric ✔

$\huge \underline \bold \red {Reason}$

➠The active ingredient present in turmeric is curcumin as an acid-base indicator that is yellow in acidic and neutral solutions and orange or reddish-brown in basic solutions.

$\huge{\bold{✏Know More}}$

Acid–base indicators are generally weak protolytes that change color in solution according to the pH.Examples of acid-base indicators include litmus paper, phenolphthalein, and red cabbage juice. An acid-base indicator is a weak acid or weak base that dissociates in water to yield the weak acid and its conjugate base or else the weak base and its conjugate acid.

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Answer 2

Explanation:

Curd contains lactic acid and vinegar contains acetic acid. Lime water, soap, and milk of magnesia are basic substances and grapes contain tartaric acid.

☞︎︎︎ 2. Which of the following is an acid - base indicator ?

Answer → Turmeric ✔