Q14 / 160 · TS EAMCET 2018 (04 May Shift 2) · Chemistry

The natural relative abundance of isotopes of hydrogen is

  • A
    ${ }_1^1 \mathrm{H}=99.985 \% ;{ }_1^2 \mathrm{D}=0.015 \%$
  • Correct answer
    B
    ${ }_1^1 \mathrm{H}=99.985 \% ;{ }_1^2 \mathrm{D}=0.015 \% ;{ }_1^3 \mathrm{~T}=10^{-16} \%$
  • C
    ${ }_1^1 \mathrm{H}=99.100 \% ;{ }_1^2 \mathrm{D}=0.900 \%$
  • D
    ${ }_1^1 \mathrm{H}=99.900 \% ;{ }_1^2 \mathrm{D}=0.10 \% ;{ }_1^3 \mathrm{~T}=10^{-15} \%$

Solution

Isotope of hydrogen is hydrogen -2 (also called) deuterium abbreviated as D. Which contains one proton and one neutron and has a natural abundance of only $0.015 \%$. $$ { }_1^1 \mathrm{H}=99.985 \% ;{ }_1^2 \mathrm{D}=0.015 \% ;{ }_1^3 \mathrm{~T}=10^{-16} \% $$

Hence, the correct answer is option: 'B'.

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