The ground state electronic configuration 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 statement:
(i) element forms a carbonate which is not decomposed by heating
(ii) Element is most likely to form coloured ionic compound
(iii) element has largest atomic radius
(iv) element forms only acidic oxide

Options

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

Answer

B

Explanation

(i) Alkali metal carbonates do not decompose even at red hot `to`V
(ii) Transition metal ions having unpaired d-electrons are coloured in aq. Sol./compounds`toX`
(iii) In case of Kr van der Waals' radius is considered, which is largest atomic radius `to`Y
(iv) Si atom has only acid `SiO_(2) to W`