9. Hydricarbon — Chemistry STD 11 Science — Question

$U\,\,\, 1s^2 \,2s^2 \,2p^3$
$V\,\,\, 1s^2\,2s^2 \,2p^6 \,3s^1$
$W\,\,\, 1s^2\,2s^2\, 2p^6\,3s^2\,3p^2$
$X\,\,\, 1s^2\,2s^2\,2p^6\,3s^2\,3p^6\,3d^5\, 4s^2$
$Y\,\,\, 1s^2\, 2s^2\,2p^6\,3s^2\,3p^6\,3d^{10}\, 4s^2\, 4p^6$

Determine which sequence of elements satisfy the following statements :
$(i)$ Element forms a carbonate which is not decomposed by heating
$(ii)$ Element is most likely to form coloured ionic compounds
$(iii)$ Element has largest atomic radius
$(iv)$ Element forms only acidic oxide

$CaC{O_3}\left( s \right)\overset \Delta  \longleftrightarrow CaO\left( s \right) + C{O_2} \uparrow ,{K_p} = 8 \times {10^{ - 2}}$

$C{O_2}\left( g \right) + C\left( s \right) \rightleftharpoons 2CO\left( g \right),{K_p} = 2$ 

$Image$

is/are

$N_2 + 3H_2 \rightleftharpoons  2NH_3 \,;$        $K_1$

$N_2 + O_2 \rightleftharpoons  2NO\,;$               $K_2$

$H_2 + 2 O_2 \rightleftharpoons  H_2O\,;$          $K_3$

The equilibrium constant $(K)$ of the reaction :

$2NH_3 + \frac{5}{2} \overset K \leftrightarrows 2NO + 3H_2O$

Which of the following is/are true about $\mathrm{A}^{\prime}, \mathrm{B}^{\prime}, \mathrm{C}^{\prime}$ and $\mathrm{D}^{\prime}$ ?

$A$. Order of atomic radii: $\mathrm{B}^{\prime}<\mathrm{A}^{\prime}<\mathrm{D}^{\prime}<\mathrm{C}^{\prime}$

$B$. Order of metallic character: $\mathrm{B}^{\prime}<\mathrm{A}^{\prime}<\mathrm{D}^{\prime}<\mathrm{C}^{\prime}$

$C$. Size of the element : $\mathrm{D}^{\prime}<\mathrm{C}^{\prime}<\mathrm{B}^{\prime}<\mathrm{A}^{\prime}$

$D$. Order of ionic radii : $\mathrm{B}^{\prime+}<\mathrm{A}^{\prime+}<\mathrm{D}^{\prime+}<\mathrm{C}^{\prime+}$

Choose the correct answer from the options given below :