TNPSC Group 4 Chemistry Model Question Paper 2019-2020 - 1

Question: 1

In which of the following form alum is used?

(A) as a water purifier

(B) as an antiseptic

(C) as a fertilizer

(D) as a pain killer

Ans: A

as a water purifier

Question: 2

Which one of the following is the most important characteristic of water to act as a good solvent?

(A) Dissolving power of water

(B) Polar nature of water

(C) Ionizing power of water

(D) Purity of water

Ans: C

Ionizing power of water

Question: 3

Which one among the following is the most unreactive gas?

(A) Nitrogen

(B) Carbon dioxide

(C) Oxygen

(D) Hydrogen

Ans: D

Hydrogen

Question: 4

In modern surgery, metal pins are used for holding the broken bones together. This pin is made of

(A) Aluminium

(B) Titanium   

(C) Stainless steel

(D) Copper

Ans: C

Stainless steel

Question: 5

Aldol condensation cannot occur between

(A) And aldehyde and an ester

(B) And aldehyde and a ketone

(C) Two different ketones

(D) Two different aldehydes

Ans: A

And aldehyde and an ester

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