NEET levelSingle correct optionDifficulty 1 of 3rg201
The gas which has the highest critical temperature among the following is
AHe
BHX2
CNHX3
DNX2
Answer: C
Tc rises with the strength of intermolecular attraction. Ammonia, which is polar and hydrogen bonded, has Tc=405K, far above NX2 (126K), HX2 (33K) and He (5K).