Question

The ground state electronic configurations of the elements, U, V, W, X and Y (these symbols do not have any chemical significance) are as follows:
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

• A. V W Y U
• B. V X Y W
• C. V W Y X
• D. V X W U

Answer 1

The correct option is A V W Y U

$\left(i\right)($V$)$${Na}^2{CO}^3($ not decomposed on heating high thermal stability$)$

$\left(ii\right)$Silicon$($W$)$

$\left(iii\right)$Nobel gas$($Y$)$

$\left(iv\right)$Nitrogen forms only acidic oxides like $No,N_2{O}_5,N_2{O}_3,$etc$($ U$).$