Friday, April 26, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

Chemistry MCQs For WBCS Prelims P10



91. Which among the following is called 'Laughing Gas' popularly?
(A) Nitrogen pentaoxide
(B) Nitrogen
(C) Nitric oxide
(D) Nitrous oxide
Correct Answer: [D] Nitrous oxide.

93. Neutron was discovered by
(A) Rutherford
(B) Neil Bohr
(C) J. Chadwick
(D) J. J. Thomson
Correct Answer: [C] J. Chadwick.

94. Colloidal particles do not settle down because
(A) They carry an electrical charge
(B) They become solvated
(C) Their specific gravity is very low
(D) They are present in far smaller quantity than that of the dispersion medium
Correct Answer: [D] They are present in far smaller quantity than that of the dispersion medium.









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