Question

Ionic compounds are

(A) Made up of positive and negative ions and attraction between ions is electrostatic
(B) Ionic bonds are non-directional
(C) Melting point and boiling point are usually low
(D) Usually soft
Choose the correct answer from the options given below:

• A. (A) and (D) only
• B. (A), (B) and (C) only
• C. (A) only
• D. (A) and (B) only

Hint:

Ionic compounds = high melting points and hard but brittle; bonds are non-directional.

Answer 1

The Correct Option is B

Step 1: Ionic compounds characteristics.
- (A) Composed of positive and negative ions: Correct. Ionic compounds are formed by ions attracted through electrostatic forces.
- (B) Ionic bonds are non-directional: Correct. Electrostatic attraction in ionic bonds is non-directional, exhibiting attraction in all directions.
- (C) Melting and boiling points are typically low: Incorrect. Ionic compounds generally have high melting and boiling points due to strong electrostatic forces.
- (D) Typically soft: Incorrect. Ionic compounds are usually hard due to strong ionic bonds.
Step 2: Conclusion. The correct options are (A), (B), and (C).
Final Answer: \[ \boxed{\text{(A), (B) and (C) only}} \]