TNPSC Group 4 Question Bank with Answers Free Download - 2

Question: 6

The element radium is extracted from

(A) Haematite

(B) Retile

(C) Pinch blend

(D) Limestone

Ans: C

Pinch blend

Question: 7

In which of the following chlorine has +1 oxidation number?

(A) Chlorine

(B) Zinc chloride

(C) Hydrochloric acid

(D) Hypochlorous acid

Ans: D

Hypochlorous acid

Question: 8

Which one of the following is a transition metal?

(A) Calcium

(B) Magnesium

(C) Manganese

(D) Aluminium

Ans: C

Manganese

Question: 9

The percentage content of carbon is found to be maximum in

(A) Anthracite

(B) Bituminous

(C) Lignite

(D) Peat

Ans: A

Anthracite

Question: 10

The nucleus of a singly ionized carbon atom contain

(A) 5 protons and 6 neutrons

(B) 6 protons and 6 neutrons

(C) 6 protons, 6 neutrons and 6 electrons

(D) 12 protons, 6 neutrons and 6 electrons

Ans: B

6 protons and 6 neutrons

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