Chemistry
In the laboratory preparation, HCl gas is dried by passing through:
- dilute nitric acid
- concentrated sulphuric acid
- dilute sulphuric acid
- acidified water
Related Questions
The metallic hydroxide which forms a deep inky blue solution with excess ammonium hydroxide solution is:
- Fe(OH)2
- Cu(OH)2
- Ca(OH)2
- Fe(OH)3
An example of a cyclic organic compound is:
- Propene
- Pentene
- Butene
- Benzene
The nitrate which on thermal decomposition leaves behind a residue which is yellow when hot and white when cold:
- Lead nitrate
- Ammonium nitrate
- Copper nitrate.
- Zinc nitrate
The salt formed when concentrated sulphuric acid reacts with KNO3 above 200°C:
- K2SO4
- K2SO3
- KHSO4
- KHSO3