Which of the following solids is not an electrical conductor

1. Mg (s)    2. TiO (s)    3. I ₂      4. H ₂ O (s)

a. only 1

b. only 2

c. 3 and 4

d. 2, 3 and 4

Ans.c

Explanation :Iodine is a non polar molecular solid in which iodine molecules are held together by London force or despersion force this is soft and non conductor of electricity

(9)