Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound.
Reason (R):	This is because sodium and chloride ions acquire octet in sodium chloride formation.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.

Assertion and reason both are correct and reason is the correct explanation of assertion.

\underset{(2, 8, 1)}{Na} + \underset{(2, 8, 7)}{Cl} \to \underset{(2, 8, 8)}{\underset{(2, 8)}{NaCl}}

Here both Na⁺ and Cl^- have complete octet hence NaCl is stable.