Chemistry - 19
91. Which among the following is called 'Laughing Gas' popularly?
(A) Nitrogen pentaoxide
(B) Nitrogen
(C) Nitric oxide
(D) Nitrous oxide
(A) Nitrogen pentaoxide
(B) Nitrogen
(C) Nitric oxide
(D) Nitrous oxide
Correct Answer: [D] Nitrous oxide.
92. Neutron was discovered by
(A) Rutherford
(B) Neil Bohr
(C) J. Chadwick
(D) J. J. Thomson
(A) Rutherford
(B) Neil Bohr
(C) J. Chadwick
(D) J. J. Thomson
Correct Answer: [C] J. Chadwick.
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
(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.
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
(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.
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
(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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