221. During winter in cold countries, the __ is mixed to melt the ice on the icy roads.
A) Salt
(B) Chlorine
(C) Carbon dioxide
(D) Water
222. The planet that moves round the Sun at the highest speed is
(A) Jupiter
(B) Venus
(C) Mars
D) Mercury
223. Oxidation is a chemical reaction involving the
(A) Gain of Electrons
B) Loss of Electrons
(C) Gain of Protons
(D) Loss of Protons
224. Which of the following is most elastic?
A: Rubber
B: Steel
C: Glass
D: Sponge
225. Other names for red blood cells are _?
(A) Leukocytes
B: Erythrocytes
(C) Thrombocytes
(D) None of these
226. Red blood corpuscles are formed in the_______?
A: Bone marrow
B: Liver
C: Kidneys
D: Heart
227. What’s the Strongest Muscle in the Human Body based on its weight?
A: Masseter
B: Hands
C: Neck
D: Legs
228. An iceberg is floating in the sea. How much of its mass will remain above the surface of water?
A: One-fifth
B: One-tenth
C: One-fourth
D: One-third
229. What natural phenomena are measured by the Richter Scale?
A: Typhoons
B: Volcanoes
C: Earthquakes
D: Tsunami
230. The coldest region of the Earth’s atmosphere is_____?
A: Thermosphere
B: Exosphere
C: Stratopause
D: Mesopause
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