PG TRB Chemistry Previous Year Question Papers with Answers Pdf - 3

Question: 11

Heavy water freezes as

(A) 0°C

(B) 3.8°C

(C) 380°C

(D) -0.38°C

Ans: B

3.8°C

Question: 12

The mass of an electron is

(A) 2

(B) 1.602 x 10-19 kg

(C) 9.108 x 10-31 kg

(D) 6.023 x 1023 kg

Ans: C

9.108 x 10-31 kg

Question: 13

Which one of the following metals has the highest density?

(A) Platinum

(B) Lead

(C) Iron

(D) Gold

Ans: A

Platinum

Question: 14

Which is a diatomic molecule?

(A) Argon

(B) Hydrogen

(C) Neon

(D) Helium

Ans: B

Hydrogen

Question: 15

Which one of the following does not wet the walls of the glass vessel in which it is kept?

(A) Alcohol

(B) Mercury

(C) Water

(D) None of these

Ans: B

Mercury

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