Oxygen consists of ${{\rm{O}}^{16}},{{\rm{O}}^{17}}{\rm{\;and\;}}{{\rm{O}}^{18}}$ isotopes and carbon consists of isotopes of ${{\rm{C}}^{12}}$ and ${{\rm{C}}^{13}}$. Total number of $C{O_2}$ molecules possible are:

JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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Oxygen consists of

{\mathrm{O}^{16}},{\mathrm{O}^{17}}\mathrm{\;and\;}{\mathrm{O}^{18}}

isotopes and carbon consists of isotopes of

{\mathrm{C}^{12}}

and

{\mathrm{C}^{13}}

. Total number of

C{O_2}

molecules possible are:

View answer and explanation

Correct option: B

Option C (18) is incorrect. There are 3 isotopes of Oxygen and 2 isotopes of Carbon. Since each CO2 molecule has one carbon and two oxygen atoms, we need to consider all combinations. The correct answer is 6.

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