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प्रश्न
Give a chemical test to distinguish between the following gases.
HCl and H2S
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उत्तर
| Hydrogen chloride | Hydrogen sulphide |
| Odour of gas: Pungent choking odour. | Odour of gas: Smell as of rotten eggs. |
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संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
TRUE \ FALSE
A precipitation reaction takes place only in a solution.
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
Write the chemical reaction where the following changes are observed.
Physical state is changed
Give reason for the following:
Silver nitrate solution is kept in coloured bottles.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper nitrate.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Give reason for the following:
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌}
between the reactants and products, formed in the chemical reaction.
Match the following:
| 1. | Sodium Chloride | a. | CaSO41/2H2O |
| 2. | Calcium sulphate dihydrate | b. | C2H5Oh |
| 3. | Magnesium sulphate hydrate | c. | CaSO4.2H2O |
| 4. | Calcium sulphate hemihydrate | d. | NaCl |
| 5. | Phenol | e. | MgSO4.H2O |
