Friday, April 26, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

Chemistry Practice Sets for WBCS, SSC, Rail, UPSC Exam P8

Chemistry - 08

36. Particles which can be added to the nucleus of an atom without changing chemical properties are called
(A) Electron
(B) Particle
(C) Neutron
(D) Proton.

Correct Answer: [C] Neutron.
37. Spectral lines of the hydrogen atom corresponding to emissions in the ultraviolet region is
(A) Brackett series
(B) Paschen series
(C) Lyman series
(D) Balmer series.

Correct Answer: [C] Lyman series.
38. Ten liters of water makes about
(A) 9 liters of solid ice
(B) 10 liters of solid ice
(C) 11 liters of solid ice
(D) 15 liters of solid ice.

Correct Answer: [C] 11 liters of solid ice.
39. In the solar spectrum, Fraunhofer lines are seen in the sodium D wavelength. This proves
(A) There is no sodium is the sun's interior.
(B) There is sodium in the solar atmosphere.
(C) There is no sodium in the sun.
(D) There is no sodium in the atmosphere.

Correct Answer: [B] There is sodium in the solar atmosphere..
40. Which one of the following is a thermoplastic polymer?
(B) Bakelite
(C) Rubber
(D) Nylon.

Correct Answer: [D] Nylon..


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