Assertion (A): | Helium is used to dilute oxygen in the diving apparatus. |
Reason (R): | Helium has a high solubility in O2. |
1. | (A) is False but (R) is True. |
2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
3. | Both (A) and (R) are True and (R) is not the correct explanation of (A). |
4. | (A) is True but (R) is False. |
1. | 1000 g of solvent | 2. | 500 mL of solvent |
3. | 500 g of solvent | 4. | 100 mL of solvent |
gas | KH/k bar |
Ar | 40.3 |
CO2 | 1.67 |
HCHO | 1.83 × 10–5 |
CH4 | 0.413 |
1. | Ar < CO2 < CH4 < HCHO |
2. | Ar < CH4 < CO2 < HCHO |
3. | HCHO < CO2 < CH4 < Ar |
4. | HCHO < CH4 < CO2 < Ar |