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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