Page 386 - General Knowledge

GENERAL KNOWLEDGE 2019

C. Helium
D. Oxygen

166. Highest percentage of nitrogen is found in which among the following fertilizers among the
given options?
A. Calcium ammonium nitrate
B. Ammonium nitrate
C. Calcium nitrate
D. Urea

167. Which among the following is popularly called Hypo?
A. Silver bromide
B. Silver nitrate
C. Sodium thiosulphate
D. Sodium phosphate

168. Which among the following is a Noble Gas?
A. Nitrogen
B. Hydrogen
C. Oxygen
D. Helium

169. Which of the following is an anti-knocking compound that has been phased out in many
countries so far?
A. Lead tetrachloride
B. Tetra Ethyl Lead
C. Ethyl acetate
D. None of the above

170. Which among the following is the main constituent of Biogas?
A. Methane
B. Ethane
C. Propane
D. Butane

171. Which among the following methods can be used to remove the permanent hardness in
water due to calcium or magnesium sulphates?
A. Sulphonate method
B. Nitrate method
C. Zeolite method
D. None of the above

172. The free electrons are in the __________?
A. Outermost orbit of the metals
B. Innermost orbit of the metals
C. Middle orbits of the metals
D. Any orbit of the metals

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