TNPSC Group 4 Question Paper with Answers 2019-2020 - 3

Question: 11

Which of the following metals is used to pollute the air of a big city?

(A) Cadmium

(B) Copper

(C) Iron

(D) Lead

Question: 12

Which one of the following is a metalloid?

(A) Lithium

(B) Boron

(C) Carbon

(D) Nitrogen

Question: 13

The ingredients of gun metal are

(A) Iron, zinc, titanium

(B) Iron, brass, tin

(C) Copper, tin

(D) Iron, tin

Question: 14

A deuterium nucleus consists of

(A) One proton and one neutron

(B) One proton and two electrons

(C) Two proton and three neutrons

(D) Two neutron and two protons

Question: 15

For a reversible reaction at equilibrium

(A) The forward reaction is faster than the reverse reaction

(B) The rate of forward reaction is equal to the rate of reverse reaction

(C) The reaction is stopped completely

(D) There is no change in volume