Q54 / 180 · KCET 2023 · Chemistry

In which one of the following pairs, both the elements does not have $(n-1) d^{10} n s^2$ configuration in its elementary state?

  • A
    $\mathrm{Zn}, \mathrm{Cd}$
  • B
    $\mathrm{Cd}, \mathrm{Hg}$
  • C
    $\mathrm{Hg}, \mathrm{Cn}$
  • Correct answer
    D
    $\mathrm{Cu}, \mathrm{Zn}$

Solution

Among the given elements copper and does not have $(n-1) d^{10} n s^2$ configuration while zinc have this configuration in its elementary state. Thus in option (d) both the elements don't have $(n-1) d^{10} n s^2$ configuration $\begin{aligned} & \mathrm{Cu} \rightarrow 4 \mathrm{~s}^1 3 d^{10} \\ & \mathrm{Zn} \rightarrow 4 \mathrm{~s}^2 3 d^{10}\end{aligned}$

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

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