Assertion. Effusion rate of oxygen is smaller than nitrogen. Reason. Molecular size of nitrogen is smaller than oxygen.

Assertion. Effusion rate of oxygen is smaller than nitrogen. Reason. M

1.	Assertion. Effusion rate of oxygen is smaller than nitrogen. Reason. Molecular size of nitrogen is smaller than oxygen.
Answer» Solution :Correct R. MOLECULAR SIZE DECREASES from left to right along a PERIOD. Thus, molecular size of nitrogen is greater than that of oxygen.