Basic Science Questions for Competitive Exam
Basic Science
Q.22 Bromine is a
(A) black solid
(B) red liquid
(C) colourless gas
(D) highly inflammable gas
Ans . B
Q.23 The hardest substance available on earth is
(A) Gold
(B) Iron
(C) Diamond
(D) Platinum
Ans . C
Q.24 The variety of coal in which the deposit contains recognisable traces of the original plant material is
(A) bitumen
(B) anthracite
(C) lignite
(D) peat
Ans . D
Q.25 Tetraethyl lead is used as
(A) pain killer
(B) fire extinguisher
(C) mosquito repellent
(D) petrol additive
Ans . D
Q.26 Which of the following is used as a lubricant?
(A) Graphite
(B) Silica
(C) Iron Oxide
(D) Diamond
Ans . A
Q.27 The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
(A) Argon
(B) Xenon
(C) Helium
(D) Krypton
Ans . C
Q.28 The gases used in different types of welding would include
(A) oxygen and hydrogen
(B) oxygen, hydrogen, acetylene and nitrogen
(C) oxygen, acetylene and argon
(D) oxygen and acetylene
Ans . D
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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