Question

Which of the following statements are true for ionic bonding?
A. Halite is formed by ionic bonding,
B. Diamond is hardest mineral because of strongest ionic bonding,
C. No molecules are formed by ionic bonding,
D. Minerals with ionic bonding have high melting points and are mechanically hard and strong. Choose the correct answer from the options given below:

• A. A and D only
• B. A and B only
• C. B and C only
• D. C and D only

Hint:

Halite is ionic, while diamond is covalent.

Answer 1

The Correct Option is A

Concept:
Ionic bonding forms due to electrostatic attraction between oppositely charged ions.

Step 1: Check statement A.
Halite \((NaCl)\) is a classic example of ionic bonding. \[ Na^+ + Cl^- \rightarrow NaCl \] So, \[ A \text{ is correct} \]

Step 2: Check statement B.
Diamond is very hard because of strong covalent bonding, not ionic bonding. \[ B \text{ is incorrect} \]

Step 3: Check statement C.
Ionic solids form crystal lattices rather than discrete molecules, but in the given option set the suitable complete correct pair is not based on C alone.

Step 4: Check statement D.
Ionic minerals usually have high melting points and are mechanically hard and strong due to strong electrostatic forces. \[ D \text{ is correct} \] Thus, the correct option is: \[ A,D \] \[ \therefore \text{Correct Answer is (A)} \]