Which of the following gases can be collected by the upward displacement of air?
Answer Details
The question is asking which of the gases listed can be collected by the upward displacement of air. When a gas is collected by the upward displacement of air, it means that the gas is lighter than air and will rise up when released into the atmosphere. The air that is displaced by the gas will be pushed down and out of the container.
To determine which gas is lighter than air, we need to look at their molecular weights. The lighter the gas, the more likely it is to be collected by the upward displacement of air.
- NO: Nitrogen monoxide has a molecular weight of 30 g/mol, which is lighter than air (which has a molecular weight of 28.8 g/mol). Therefore, it can be collected by the upward displacement of air.
- H2: Hydrogen gas has a molecular weight of 2 g/mol, which is much lighter than air. Therefore, it can be collected by the upward displacement of air.
- NH3: Ammonia gas has a molecular weight of 17 g/mol, which is lighter than air. Therefore, it can be collected by the upward displacement of air.
- Cl2: Chlorine gas has a molecular weight of 71 g/mol, which is much heavier than air. Therefore, it cannot be collected by the upward displacement of air.
Therefore, the gases that can be collected by the upward displacement of air are NO, H2, and NH3.