Previous 10 Years Question Papers with Answers for TRB Chemistry - 5

Question: 21

The non metal which is in liquid state is

(A) Calcium

(B) Iodine

(C) Bromine

(D) Mercury

Ans: C

Bromine

Question: 22

Which one of the following elements is used in the manufacture of safety matches?

(A) Graphite

(B) Sodium

(C) Silicon

(D) Phosphorus

Ans: D

Phosphorus

Question: 23

Which of the following electromagnetic wave has the longest wavelength?

(A) Infra red rays

(B) Gamma rays

(C) Light rays

(D) Ultra-violet rays

Ans: A

Infra red rays

Question: 24

Natural radioactivity was discovered by

(A) Rutherford

(B) Henri Becquerel

(C) Schmidt

(D) Curie

Ans: B

Henri Becquerel

Question: 25

Stainless steel contains

(A) Fe+ Cr+ Cu

(B) Fe+ C+ Ni

(C) Fe+ Ni+ Cu

(D) Fe+ Cr +Ni

Ans: D

Fe+ Cr +Ni

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