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प्रश्न
Which of the following is an acid-base indicator?
पर्याय
Vinegar
Lime water
Turmeric
Baking soda
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उत्तर
Turmeric
Explanation:
Turmeric is an acid-base indicator. It is yellow in acidic solution and red in basic solution.
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संबंधित प्रश्न
Name one natural source of the following acids:
Oxalic acid
Name one animal and one plant whose stings contain formic acid (or methanoic acid).
The salt which will give a neutral solution on dissolving in water will be:
(a) CH3COONa
(b) NH4Cl
(c) KCl
(d) Na2CO3
Name an acid used in a drink.
Give one example in the following case:
A hydrogen containing compound which is not an acid.
Write balanced equation to satisfy the following statement:
\[\ce{Acid + Active metal -> Salt + hydrogen}\]
You are supplied with five solutions: A, B, C, D and E with pH values as follows: A = 1.8, B = 7, C = 8.5, D = 13, and E = 5
Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline.
Which solution would be most likely to liberate hydrogen with magnesium powder. Give a word equation for each reaction.
Define an acid.
Match the substances in Column I with those in Column II.
| Column 1 | Column II | ||
| (a) | Tartaric acid | (i) | soap |
| (b) | Calcium hydroxide | (ii) | curd |
| (c) | Formic acid | (iii) | unripe mangoes |
| (d) | Sodium hydroxide | (iv) | ant’s sting |
| (e) | Lactic acid | (v) | lime water |
Acidic or basic solutions are good conductors of electricity. Justify your answer.
