Which among the following is a heaviest isotope of water?

Which among the following is a heaviest isotope of water?
  1. $\mathrm{T}_{2}{ }^{17} \mathrm{O}$
  2. $\mathrm{T}_{2}{ }^{16} \mathrm{O}$
  3. $\mathrm{HD}^{18} \mathrm{O}$
  4. $\mathrm{T}_{2}{ }^{18} \mathrm{O}$

Solution

Isotopes of water are $=\mathrm{H}_{2} \mathrm{O}, \mathrm{D}_{2} \mathrm{O}, \mathrm{H}_{2} \mathrm{O}^{17} \ldots$ etc. $\quad\quad\quad\quad\quad$ Mol.wt (A) $\mathrm{T}_{2} 0^{17} \rightarrow$ 23 (B) $T_{2}{ }^{16} \mathrm{O}\rightarrow$ 22 (c) $\mathrm{HD}_{0}^{18}\rightarrow$ 21 (D) $T_{2}{ }^{18} 0\rightarrow$ 24 Heaviest $=T_{2}^{18} 0$

Asked in: MHT CET 2020 (12 Oct Shift 2)

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