MCQ
Two gases $A$ and $B$ are taken in same volume containers under similar conditions of temperature and pressure. In container $A,$ there are $'2N\ '$ molecules of gas $A$. The number molecules does container $B$ have:
  • A
    $N$
  • B
    $0.5N$
  • $2N$
  • D
    $4N$

Answer

Correct option: C.
$2N$
$1.$ According to Avogadro's law, the equal volume of gases under a similar condition of pressure and temperature contain equal no. of molecules.Therefore the number of molecules in container $B$ will also be $2N$.
$2$. As we know, one mole of each gas occupies $22.4-$ litre volume and one mole of gas contains $\ce{N_A}$ molecules at $\text{STP.}$
So at the same temperature and pressure, the equal volume of gas contains equal no of molecules.
Therefore the number of molecules in container $B$ will also be $2N.$

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