Basic Science Questions for Competitive Exam
General Science Questions and Answers
Q.15 Which of the gas is not known as green house gas?
(A) Methane
(B) Nitrous oxide
(C) Carbon dioxide
(D) Hydrogen
Ans . D
Q.16 Brass gets discoloured in air because of the presence of which of the following gases in air?
(A) Oxygen
(B) Hydrogen sulphide
(C) Carbon dioxide
(D) Nitrogen
Ans . B
Q.17 Which of the following is a non metal that remains liquid at room temperature?
(A) Phosphorous
(B) Bromine
(C) Chlorine
(D) Helium
Ans . B
Q.18 Chlorophyll is a naturally occurring chelate compound in which central metal is
(A) copper
(B) magnesium
(C) iron
(D) calcium
Ans . B
Q.20 Which of the following is used in pencils?
(A) Graphite
(B) Silicon
(C) Charcoal
(D) Phosphorous
Ans . A
Q.21 Which of the following metals forms an amalgam with other metals?
(A) Tin
(B) Mercury
(C) Lead
(D) Zinc
Ans . B
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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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