1(viii)
Assertion (A): Ionic compounds have high melting points.
Reason (R): A strong electrostatic force of attraction exists between the oppositely charged ions.
- (a)(A) is true but (R) is false.
- (b)(A) is false but (R) is true.
- (c)Both (A) and (R) are true, and (R) is the correct explanation of (A).
- (d)Both (A) and (R) are true, but (R) is not the correct explanation of (A).
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Both (A) and (R) are true, and (R) is the correct explanation of (A).
Reason — In ionic compounds, the oppositely charged ions are held together by strong electrostatic forces of attraction. A large amount of heat energy is required to break these forces, so ionic compounds have high melting points. Thus, (R) correctly explains (A).