Statement 1 : Both Cu+  and  Na+ have almost same radii.Statement 2 : Cu+ possesses more power to polarise an anion.

# Statement 1 : Both ${\mathrm{Cu}}^{+}\text{\hspace{0.17em}\hspace{0.17em}}\mathrm{and}\text{\hspace{0.17em}\hspace{0.17em}}{\mathrm{Na}}^{+}$ have almost same radii.Statement 2 : ${\mathrm{Cu}}^{+}$ possesses more power to polarise an anion.

1. A

Both Statement 1 and Statement 2 are true .

2. B

Statement 1 is true and Statement 2  is false.

3. C

Statement 1 is false and Statement 2 is true.

4. D

Both Statement 1 and Statement 2 are false.

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### Solution:

The more power of ${\mathrm{Cu}}^{+}$ to polarize an anion is due to its pseudo noble gas structure.

${\mathrm{r}}_{{\mathrm{Cu}}^{+}}\text{\hspace{0.17em}}=0.96\text{\hspace{0.17em}\hspace{0.17em}}{\mathrm{A}}^{\mathrm{o}};\text{\hspace{0.17em}\hspace{0.17em}}{\mathrm{r}}_{{\mathrm{Na}}^{+}}\text{\hspace{0.17em}}=0.95\text{\hspace{0.17em}\hspace{0.17em}}{\mathrm{A}}^{\mathrm{o}}$

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