Advertisements
Advertisements
प्रश्न
Name a sodium compound which is a constituent of many dry soap powders.
उत्तर
Sodium carbonate decahydrate `(Na_2 CO_3.10H_2O),`popularly known as washing soda, is a constituent of many dry soap powders.
APPEARS IN
संबंधित प्रश्न
Name the acid-base indicator extracted from lichen.
The acid produced naturally in our stomach is:
(a) acetic acid
(b) citric acid
(c) hydrochloric acid
(d) sulphuric acid
Name an acid used as an eyewash.
Acid mixed with base forms ______.
Lemon juice and vinegar taste ___________ because they contain ___________.
Name the acid present in the given table.
Complete the following equation.
Zn + ______ → Na2ZnO2 + H2 ↑
Why does blue color copper sulphate become white on heating?
Match the following:
| 1. | The hardest substance in our body | a. | Aluminum phosphate |
| 2. | Citrus fruits | b. | Potash alum |
| 3. | Rice plant | c. | Insoluble in water |
| 4. | Double salts | d. | Acidic soil |
| 5. | Silver chloride | e. | Calcium phosphate |
| f. | Alkaline soil |
A metal 'M' on reacting with dilute acid liberates a gas 'G'. The same metal also liberates gas 'G' when reacts with a base.
- Write the name of gas 'G'.
- How will you test the presence of this gas?
- Write chemical equations for the reactions of the metal with (1) an acid and (2) a base.
