Which has maximum number of molecules

Options

(a) 7 gm N₂
(b) 2 gm H₂
(c) 16 gm NO₂
(d) 16 gm O₂

Correct Answer:

2 gm H₂

Explanation:

2 gm of H₂ means one mole of H₂.
one mole of H₂ contains 6.02 x 10²³ molecules.
Others have less than one mole, so have less number of molecules