Friday, February 28, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

Chemistry mcq book For UPSC | SSC | Rail | RRB | State PSC P19


Chemistry - 19

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.
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92. Neutron was discovered by
(A) Rutherford
(B) Neil Bohr
(C) J. Chadwick
(D) J. J. Thomson

Correct Answer: [C] J. Chadwick.
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93. 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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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.
Add
95. 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.
Add


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