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General Science - Questions and Answers

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231. Ball bearings are used in a vehicle to
A. increase friction
B. reduce friction
C. make the wheel stable
D. None of these
Explanation:
232. A substance which can act both as an acid and a base is known as
A. Amorphous
B. Allotropic
C. Amphoteric
D. None of these
Explanation:
233. Which of the following substances has the lowest specific gravity ?
A. Iron
B. Gold
C. Marble
D. Brass
Explanation:
234. Which of the following is paired correctly ?
A. Lysosomes - Hereditary characters
B. Xylem - Vascular tissue
C. Heavy water - Allotropic form of carbon
D. Graphite - Deuterium oxide
Explanation:
235. An ice cube is floating in a glass be affected when the ice cube melts ?
A. It will rise.
B. It will go down.
C. It will remain unchanged.
D. It would first go up but later on it will go down.
Explanation:
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