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प्रश्न
Name an acid used to remove ink spots.
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उत्तर
Oxalic acid
संबंधित प्रश्न
When a solution is added to a cloth strip treated with onion extract, then the smell of onion cannot be detected. State whether the given solution contains an acid or a base.\
The salt which will give a neutral solution on dissolving in water will be:
(a) CH3COONa
(b) NH4Cl
(c) KCl
(d) Na2CO3
Give two examples of the following:
monobasic acid
Out of three metals P, Q and R, P is less reactive than Q and R is more reactive than P and Q both. Suggest an activity to arragne P, Q and R in order of their decreasing reactivity.
Sulphuric acid has the highest importance in the chemical industry. Why?
Most of the acids are not soluble in water.
Match the chemical substances given in Column (A) with their appropriate application given in Column (B)
| Column (A) |
Column (B) |
| (A) Bleaching powder | (i) Preparation of glass |
| (B) Baking soda | (ii) Production of H2 and Cl2 |
| (C) Washing Soda | (iii) Decolourisation |
| (D) Sodium chloride | (iv) Antacid |
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 |
Which of the following metal does not react with sodium hydroxides?
Complete the following equation.
Ca(OH)2 + ______ → ______ + H2O
