Match Column I with Column II: Column I: (A) gas at 300 K (B) gas at 400 K (C) gas at 900 K (D) He g — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

KE per mol $\propto T$; KE per gram $\propto T/M$. Ratios $T/M$: H$_2$(300K): 300/2=150, CH$_4$(400K): 400/16=25, O$_2$(900K): 900/32=28.1, He(600K): 600/4=150. (P) Max KE/mol → highest $T$: O$_2$ at 900K → C. (Q) Max KE/gram → highest $T/M$=150: H$_2$ and He → A, D. (R) Min KE/mol → lowest $T$: H$_2$ at 300K → A. (S) Min KE/gram → lowest $T/M$=25: CH$_4$ → B.