Friday, April 26, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

General Science MCQs with Answers For UPSC, SSC, WBPSC Exams P6


Page 6

166351. All reactions involving the chemical decomposition
A
Are reversible and endothermic
B
Maybe reversible or irreversible and exothermic or endothermic
C
Are reversible
D
Are endothermic
B
Correct Answer: B. Maybe reversible or irreversible and exothermic or endothermic
166452. When a helium atom loses an electron, it is converted to a
A
Deuteron
B
Helium ion
C
Proton
D
particle
B
Correct Answer: B. Helium ion
166553. Which ones of the following are called Noble gases?
A
Argon and Neon
B
Hydrogen and Neon
C
Oxygen and Hydrogen
D
Oxygen and Argon
A
Correct Answer: A. Argon and Neon
166654. Chlorine is not a constituent of
A
Chloroform
B
Bleaching powder
C
DDT
D
Chlorophyll
D
Correct Answer: D. Chlorophyll
166755. Which among the following gas was leaked during the Bhopal gas tragedy in 1984?
A
Methyl isochloride
B
Methyl isochlorate
C
Methyl isocyanide
D
Methyl isocyanate
D
Correct Answer: D. Methyl isocyanate
166856. In the manufacture of Vanaspati ghee from vegetable oils, which among the following gas is used?
A
Hydrogen
B
Neon
C
Nitrogen
D
Carbon dioxide
A
Correct Answer: A. Hydrogen
166957. Calculate the shielding suffered by valence electron in fluorine
A
5.80
B
4.85
C
5.20
D
4.80
D
Correct Answer: D. 4.80
167058. The unit of radioactivity is
A
Curie
B
Einstein
C
Plank
D
None of the above
A
Correct Answer: A. Curie
167159. The toxic chemical element that caused Minamata disease in Japan was
A
Cadmium
B
Arsenic
C
Uranium
D
Mercury
D
Correct Answer: D. Mercury
167260. One of the breakthroughs of Acharya P.C. Roy was to synthesize the following compound
A
Hg2Cl2
B
H2O4
C
HgCl2
D
HgO
C
Correct Answer: C. HgCl2



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