1. Which of the following forms of carbon occurs naturally?
(1) Coke (2) Charcol
(3) Asphalt (4) Diamond
2. Graphite differs from diamond because graphite is:(1) Slippery to touch and good conductor of electricity
(2) Slippery to touch and very good conductor of heat
(3) Greyish black in colour and bad conductor of electricity
(4) Greyish black in colour and very good conductor of heat
3. Which of the following is incombustible?
(1) Carbon monoxide (2) Hydrogen
(3) Carbondioxide (4) Wax
4. Which of the following is hardest substance?
(1) Steel (2) Diamond
(3) Stone (4) Graphite
5. Which of the following is used to cut glasses?
(1) Lead (2) Iron
(3) Graphite (4) Diamond
6. In a magnet the tiny domains align themselves:
(1) In different direction (2) In same direction
(3) In random fashion (4) None of the above
7. In electric bells, the magnet used is:
(1) Permanent magnet
(2) Bar magnet
(3) Temporary magnet
(4) None of the above
8. By the effect of heat, a magnet:
(1) Losses is magnetic property
(2) Becomes strong magnet
(3) Becomes temporary magnet
(4) None of the above
9. An iron bar is identified as a magnet if the north pole of a magnet:
(1) Neither attracts nor repels any of the tips
(2) Attracts it’s one tip but repels the other
(3) Attract it’s both tips
(4) Repels it’s both tips
10. If a bar magnet is cut in four equal parts then joined together with quick fix, the resulting bar magnet will behave as:
(1) Four bar magnets
(2) Four normal iron bars
(3) A normal bar magnets
(4) A normal iron bar
Ans. 1- (4) 2-(1) 3-(3) 4-(2) 5-(4)
6-(2) 7-(3) 8-(1) 9-(2) 10-(3)
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