TNPSC Group 4 Chemistry Question Paper with Answers - 1

Question: 1

In all biological compounds the most fundamental element is

(A) Sulphur

(B) Carbon

(C) Oxygen

(D) Nitrogen

Question: 2

The most abundantly occurring element in the earth crust is

(A) Silicon

(B) Nitrogen

(C) Manganese

(D) Oxygen

Question: 3

Permanent hardness of water may be removed by the addition of

(A) Potassium permanganate

(B) Lime

(C) Sodium carbonate

(D) Alum

Question: 4

H₂O is the chemical formula of

(A) Water

(B) Ammonia

(C) Ozone

(D) Hydrogen peroxide

Question: 5

Which of the following substance is a bad conductor of electricity but a good conductor of heat?

(A) Mica

(B) Purspecks

(C) Celluloid

(D) Asbestos