Number of $\mathrm{Zn}$ atoms present in $122 \mathrm{~g}$ of $\mathrm{ZnO}$ is (Atomic wt. of $\mathrm{Zn}=65$)

$\frac{\mathrm{N}_{\mathrm{A}}}{2}$

JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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Application +4 | -1

Number of

\mathrm{Zn}

atoms present in

122 \mathrm{~g}

\mathrm{ZnO}

is (Atomic wt. of

\mathrm{Zn}=65

)

View answer and explanation

Correct option: C

\frac{3 \mathrm{~N}_{\mathrm{A}}}{2}

Option C (

\frac{{3 \mathrm{~N}_{\mathrm{A}}}}{{2}}

) is correct because 122 g of ZnO corresponds to 1.5 moles, hence 1.5 N_A atoms of Zn.

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