set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

In the manufacture of lead glass:

1. Oxide of lead is added to ordinary glass
2. Oxide of lead increases the density of glass
3. Oxide of lead increases the refractive index of glass
4. Oxide of lead decreases the refractive index of glass

a) 1, 3 and 4

b) 2, 3 and 4

c) 1, 2 and 4

d) 1, 2 and 3

Question : 2

Match List-I with List-II :

a) 1 2 3 4

b) 2 1 3 4

c) 1 2 4 3

d) 2 1 4 3

Question : 3

What is the usual property of oxides of Group III and IV?

a) Basic and acidic

b) Acidic

c) Basic

d) Neutral

Question : 4

Consider the following statements:

1. The discovery of inert gases later on did not disturb Mendeleev’s arrangement.
2. In the present periodic table, periodicity in the properties of elements is related to the periodicity in their electronic configurations.

a) 1 and 2 both

b) 2 only

c) 1 only

d) None

Question : 5

Consider the following statements :

1. Metals can form positive ions by losing electrons to non-metals.
2. Different metals have same reactivities with water and dilute acids.
3. A more reactive metal displaces a less reactive metal from its salt solution.

a) 2 and 3

b) 1 and 3

c) 1 and 2

d) 1, 2 and 3

Question : 6

Which one of the following is present in the largest amount in terms of percent by mass in the Earth’s crust?

a) Silicon

b) Carbon

c) Oxygen

d) Calcium