The ground state electronic configurations of some elements, P, Q, R, S and T (these symbols represent the some of the known elements given in the periodic table) are as follows.
(P) : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}$
(Q) : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1}$
(R) : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$
(S) : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{6} 4 s^{1}$
(T) : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{1} 4 s^{2} 4 p^{6}$
Match the electronic configurations of the elements with the properties given below and select the
correct sequence by choosing the correct code given.
(i) Element forms a cation which is isoelectronic with $P^{3 -}$ .
(ii) Element which in its compounds can show a maximum oxidation state of +6 and that is coloured too.
(iii) Element has largest atomic radius and highest first ionisation energy in the respective period.
(iv) Element which has intermediate value of electronegativity and its oxide forms salts with strong acids and bases

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P Q R S

Q R T P

Q S T R

Q R S T

answer is B.

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Detailed Solution

Q element belongs to group 1which is alkali metals group and metallic oxides are basic. This Element forms a cation which is isoelectronic with $P^{3 -}$ .

T belongs to p block which in its compounds can show a maximum oxidation state of +6 and that is coloured too.

Al has an electron configuration $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$ . Al's oxide forms salts with strong acids and bases and has an intermediate electronegativity value.