Friday, February 28, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

Chemistry quiz For UPSC | SSC | Rail | RRB | State PSC | class 10 icse P16


Chemistry - 16

76. Which of the following substances can act as an only reducing agent?
(A) K2Cr2O7
(B) H2S
(C) H2O2.
(D) MnO2

Correct Answer: [B] H2S.
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77. Hydrogen peroxide has the same number of electrons as (Iso-electronic Species)
(A) CH2 = CH2
(B) CH3CHO
(C) HCHO
(D) CH3OH

Correct Answer: [D] CH3OH.
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78. Vulcanization is the process of heating rubber with 3-5 % of
(A) Potassium permanganate
(B) Naphthalene
(C) Sulphur
(D) Lime

Correct Answer: [C] Sulphur.
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79. Paint & Varnish contains
(A) Mustard oil
(B) Kerosene oil
(C) Linseed oil
(D) Coconut oil

Correct Answer: [C] Linseed oil.
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80. Which pollutant of the atmosphere inhibits the Hill reaction of photosynthesis?
(A) Ultraviolet rays
(B) Hydro Carbon
(C) Peroxyacetyl nitrate
(D) Nitrogen monoxide

Correct Answer: [C] Peroxyacetyl nitrate.
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