The strongest acid among the following compounds is:
| 1. | HClO3 | 2. | HClO4 |
| 3. | H2SO3 | 4. | H2SO4 |
Benzaldehyde cannot be prepared by:
| 1. | |
| 2. | |
| 3. | |
| 4. |
Roasting of sulphides gives the gas X as a by-product. This is a colourless gas with a choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic and acts as an oxidizing agent and its acid has never been isolated. The gas X is:
1. SO2
2. CO2
3. SO3
4. H2S
An electron-deficient compound among the following is:
| 1. | (SiH3)2 | 2. | (BH3)2 |
| 3. | PH3 | 4. | (CH3)2 |
| 1. | H2O | 2. | SO2 |
| 3. | NO2 | 4. | CO2 |
Which of the following compounds does not release oxygen when heated?
1. Zn(ClO3)2
2. K2Cr2O7
3. (NH4)2Cr2O7
4. KClO3