Friday, June 18, 2021

WBCS Polity and Constitution MCQs Prelims and Mains

General Science (Chemistry) For Competitive Exam Preparation P25


Page 25

90191241. Which one of the following gases has the highest calorific value?
A
Natural gas
B
Water gas
C
Coal gas
D
Indane gas
D
Correct Answer: D. Indane gas
90168242. Which is abundant in Gobar gas?
A
Carbon dioxide
B
Methane
C
Oxygen
D
Hydrogen
B
Correct Answer: B. Methane
90104243. The chemical used in embalming biological materials is
A
formaldehyde in water
B
formaldehyde in methanol
C
ethylene glycol
D
gaseous formaldehyde
A
Correct Answer: A. formaldehyde in water
90149244. Urea is a
A
Sodium fertilizer
B
Phosphatic fertilizer
C
Nitrogenous fertilizer
D
Potassium fertilizer
C
Correct Answer: C. Nitrogenous fertilizer
90117245. The gas which turns into liquid at the lowest temperature among the following is
A
hydrogen
B
oxygen
C
helium
D
nitrogen
A
Correct Answer: A. hydrogen
90048246. Glass is a
A
pure solid
B
supercooled liquid
C
gel
D
polymer
B
Correct Answer: B. supercooled liquid
90188247. Which of the toxic heavy metals is found in modern tannery industries?
A
Nickel
B
Zinc
C
Chromium
D
Lead
C
Correct Answer: C. Chromium
90046248. Galvanization of iron is carried out using
A
Zinc
B
Tin
C
Copper
D
Chromium
A
Correct Answer: A. Zinc
90098249. The acid used in lead storage cells is
A
phosphoric acid
B
hydrochloric acid
C
nitric acid
D
sulphuric acid
D
Correct Answer: D. sulphuric acid
90161250. What is the name of that system. which uses radioactivity to decide the period of materials of-pre-his-toric period ?
A
Radium dating
B
Uranium dating
C
Carbon dating
D
Deuterium dating
C
Correct Answer: C. Carbon dating



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