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
(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..
52. When a helium atom loses an electron, it is converted to a
(A) Deuteron
(B) Helium ion
(C) Proton
(D) particle
(A) Deuteron
(B) Helium ion
(C) Proton
(D) particle
Correct Answer: [B] Helium ion.
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
(A) Argon and Neon
(B) Hydrogen and Neon
(C) Oxygen and Hydrogen
(D) Oxygen and Argon
Correct Answer: [A] Argon and Neon.
54. Chlorine is not a constituent of
(A) Chloroform
(B) Bleaching powder
(C) DDT
(D) Chlorophyll
(A) Chloroform
(B) Bleaching powder
(C) DDT
(D) Chlorophyll
Correct Answer: [D] Chlorophyll.
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
(A) Methyl isochloride
(B) Methyl isochlorate
(C) Methyl isocyanide
(D) Methyl isocyanate
Correct Answer: [D] Methyl isocyanate.
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