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JEE Main levelOne or more correct optionsDifficulty 2 of 3ig198

Under identical conditions of temperature and pressure, which pairs of gases diffuse at the same rate?

A $CO$ and $N X_{2}$
B $CO X_{2}$ and $N X_{2} O$
C $C X_{2} H X_{4}$ and $N X_{2}$
D $O X_{2}$ and $CH X_{4}$

Answer: A, B, C

Equal molar masses give equal rates.

CO

and

N X_{2}

: 28 (A).

CO X_{2}

and

N X_{2} O

: 44 (B).

C X_{2} H X_{4}

and

N X_{2}

: 28 (C).

O X_{2}

(32) and

CH X_{4}

(16) differ (D wrong).

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