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1. Air shows the property of
(a) N2
(b) O2
(c) Both (a) and (b)
(d) None of these.
2. The components of water can be separated by
(a) Physical methods
(b) Chemical methods
(c) Both
(d) They can�t be separated
3. Mixture can be
(a) homogeneous
(b) heterogeneous
(c) Both (a) and (b)
(d) pure substance
4. Brass is a
(a) Compound
(b) Element
(c) Homogeneous mixture
(d) Heterogeneous mixture
5. In sugar solution,
(a) Sugar is solute, water is solvent
(b) Sugar is solvent, water is solute
(c) Both are solutes
(d) Both are solvents.
6. Brass is a solution of molten copper in
(a) solid zinc
(b) molten zinc
(c) gaseous zinc
(d) molten tin
7. 24 carat of diamond is equal to
(a) 200 mg
(b) 200 g
(c) 95% mg
(d) 91% gold
8. 1 carat of diamond is equal to
(a) 200 mg
(b) 200 g
(c) 100 mg
(d) 100 g
9. Diamond is lustrous because
(a) it is colourless
(b) it is hard
(c) it is pure
(d) its refractive index is high
10. If we burn graphite,
(a) residue will be left
(b) no residue will be left
(c) it will not burn
(d) it will change into diamond.
11. Nanometer is an
(a) Instrument used for measuring micro-distance
(b) Instrument used for measuring macro-distance
(c) Unit for measuring micro-distance
(d) Unit for measuring macro-distance.
12. Barometer measures
(a) Pressure
(b) Atmospheric pressure
(c) Wind velocity
(d) Gaseous pressure.
13. Thermometer is an instrument that measures
(a) Temperature of substance
(b) Heat of substance
(c) Radiation of substance
(d) Flow energy in a substance.
14. Anemometer measures
(a) Amount of haemoglobin in blood
(b) Pollination of plant by the wind
(c) Wind resistance
(d) Wind speed.
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