Friday, February 28, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

ncert objective questions and answers For UPSC | SSC | Rail | RRB | State PSC P11


Chemistry - 11

51. 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

Correct Answer: [B] Maybe reversible or irreversible and exothermic or endothermic..
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52. When a helium atom loses an electron, it is converted to a
(A) Deuteron
(B) Helium ion
(C) Proton
(D) particle

Correct Answer: [B] Helium ion.
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53. 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

Correct Answer: [A] Argon and Neon.
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54. Chlorine is not a constituent of
(A) Chloroform
(B) Bleaching powder
(C) DDT
(D) Chlorophyll

Correct Answer: [D] Chlorophyll.
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55. 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

Correct Answer: [D] Methyl isocyanate.
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