Factors to consider when collecting a gas by displacement of;1 air2 water

Question

State and explain the factors that are considered when collecting a gas by displacement of:

1. Air
2. Water

Answer 1

1.Density:The gas which is denser than air is collected by downward delivery while the gas which is less dense is collected by upward delivery
2.Solubility:The gas insoluble in water is collected over water

Answer 2

1.Density:The gas which is denser than air is collected by downward delivery while the gas which is less dense is collected by upward delivery
2.Solubility:The gas insoluble in water is collected over water