Statement 1: Equal weights of $^{14} C O_{2}$ and $N O_{2}$ have the same number of molecules.
Statement 2: $^{14} C O_{2}$ and $N O_{2}$ have the same molecular weight.
Statement 3: Equal volumes of $C O_{2}$ and $N O_{2}$ have the same weight.

TFF

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Solution

The correct option is B TTF
The molecular weight of $^{14} C O_{2} = 14 + 16 + 16 = 46$
The molecular weight of $N O_{2} = 14 + 16 + 16 = 46$
Thus, the molecular weights of $^{14} C O_{2}$ and $N O_{2}$ are the same.
Equal weights of $^{14} C O_{2}$ and $N O_{2}$ will have the same number of molecules since they will have the same number of moles.
Equal volumes of $C O_{2}$ and $N O_{2}$ will not have the same weight as they will have different molecular weights.

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