A) \[MO\]
B) \[{{M}_{2}}{{O}_{3}}\]
C) \[{{M}_{2}}O\]
D) \[{{M}_{2}}{{O}_{5}}\]
Correct Answer: C
Solution :
As we know that Equivalent weight \[=\frac{\text{weight of metal}}{\text{weight of oxygen}}\times 8\] \[=\frac{32}{0.4}\times 8=64\] Vapour density \[=\frac{\text{mol}\text{. wt}}{\text{2}}\] Mol. wt \[=2\times V.D=2\times 32=64\] As we know that \[n=\frac{\text{mol}\text{.}\,\text{wt}}{\text{eq}\text{. wt}}=\frac{64}{64}=1\] Suppose, the formula of metal oxide be \[{{M}_{2}}{{O}_{n}}\]. Hence the formula of metal oxide \[={{M}_{2}}O\].
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