set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Example of corrosion is

a) Green coating on Copper

b) Brown coating on Iron

c) Black coating on Silver

d) Above three

Question : 2

Which among the following atoms has high atomic radi?

a) Rb

b) K

c) Na

d) Cs

Question : 3

The scientist who made maximum contribution towards periodic table was

a) Rutherford

b) Dalton

c) Chadwick

d) Mendeleev

Question : 4

Which of the following is/are the example/examples of chemical change?

1. Crystallization of sodium chloride
2. Melting of ice
3. Souring of milk

a) Only 3

b) 1, 2 and 3

c) Only 1 and 2

d) None of the above

Question : 5

Why does water boil at a temperature below 100ºC at higher altitudes?

a) The gravitational attraction is less

b) Because of heavy winds in mountains

c) The atmospheric pressure decreases and hence boiling point is lowered

d) None of the above is correct

Question : 6

Element A belongs to Group VII in p-block and element B belongs to Group I in s-block of the periodic table. Out of the following assumptions, the correct one is :

a) A and B are non-metals

b) A is a metal and B is a non-metal

c) A and B are metals

d) A is a non-metal and B is a metal