MCQ
From the following the largest number of atoms are in
  • A
    $36g\, H_2O$
  • B
    $28g\, CO$
  • $46g\, C_2H_5OH$
  • D
    $54g\, N_2O_5$

Answer

Correct option: C.
$46g\, C_2H_5OH$
c
No. of atoms $=$ atomicity $\times$ no. of moles

${{\text{n}}_{{{\text{H}}_2}{\text{O}}}} = \frac{{36}}{{18}} = 2$

$\mathrm{n}_{\mathrm{CO}}=\frac{28}{28}=1$

${n_{{C_2}{H_5}OH}} = \frac{{46}}{{46}} = 1$

${n_{{N_2}{O_5}}} = \frac{{54}}{{108}} = 0.5$

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