general Chemistry test questions and answers For UPSC | SSC | Rail | RRB | State PSC P12

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Chemistry - 12

56. 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

Correct Answer: [A] Hydrogen.

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57. Calculate the shielding suffered by valence electron in fluorine
(A) 5.80
(B) 4.85
(C) 5.20
(D) 4.80

Correct Answer: [D] 4.80.

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58. The unit of radioactivity is
(A) Curie
(B) Einstein
(C) Plank
(D) None of the above

Correct Answer: [A] Curie.

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59. The toxic chemical element that caused Minamata disease in Japan was
(A) Cadmium
(B) Arsenic
(C) Uranium
(D) Mercury

Correct Answer: [D] Mercury.

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60. One of the breakthroughs of Acharya P.C. Roy was to synthesize the following compound
(A) Hg2Cl2
(B) H2O4
(C) HgCl2
(D) HgO

Correct Answer: [C] HgCl2.

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