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

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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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