Match the values of 1st and 2nd ionisation energy and electron gain enthalpy given in the column-I with types of elements/compounds given in column-II.
$Δ_{1} H_{1}, Δ_{1} H_{2}, Δ_{e g} H (in kJ {mol}^{- 1})$
Colamn-I Colamn-II
(a) 2372 5251 -48 (p) Element which exists as a strong reducing agent
(b) 1419 3051 - 49 (q) Element which exists as a monoatomic molecule
(c) 1681 3051 -49 (r) Least reactive non-metal
(d) 1008 1846 -295 (s) Element which acts as a strong oxidising agent
(t) Element whose oxide is strongly basic in nature.

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(a-p), (b-q, t). (c-r), (d-t)

(a-q), (b-p, t). (c-s), (d-r)

(a-p), (b-p, s). (c-q), (d-t)

(a-t), (b-p, t). (c-r), (d-r)

answer is A.

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Detailed Solution

The noble gases exist as monatomic elements with values,

$Δ_{1} H_{1} = 2372 Δ_{1} H_{2} = 5251,, Δ_{e g} H = - 48 (in kJ {mol}^{- 1})$

For instance, the strongest common oxidising agent is elemental fluorine with values,

$Δ_{1} H_{1} = 1681 Δ_{1} H_{2} = 3374,, Δ_{e g} H = - 333 (in kJ {mol}^{- 1})$

Helium is the least reactive of the non-metallic elements with values,

$Δ_{1} H_{1} = 1008 Δ_{1} H_{2} = 1846, Δ_{e g} H = - 295 (in kJ {mol}^{- 1})$

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	Colamn-I		Colamn-II
(a)	2372 5251 -48	(p)	Element which exists as a strong reducing agent
(b)	1419 3051 - 49	(q)	Element which exists as a monoatomic molecule
(c)	1681 3051 -49	(r)	Least reactive non-metal
(d)	1008 1846 -295	(s)	Element which acts as a strong oxidising agent
		(t)	Element whose oxide is strongly basic in nature.