Question

The $I.E{.}_1$ and the $I.E{.}_2$ in $kJmo{l}^{-1}$ of a few elements designated by P, Q, R, S are shown

Atom	$I.E{.}_1$	$I.E{.}_2$
A	2372	5251
B	520	7300
C	900	1760
D	1680	3380

Based on above information, Which of the element is likely to be reactive metal?

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is B B

Element 2 has a very low value of first ionization energy and a high value of second ionization energy. Hence, it is reactive alkali metal.

Its first ionization energy is lowest among the given elements

Hence option B is the answer