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1496. When an open bottle of scent is kept in a corner of the room, its odour is felt in all the corners. This is due to the phenomenon of :
A. vaporisation
B. evaporation
C. diffusion
D. sublimation
Explanation:
1497. Oil rises up the wick in a lamp because
A. oil is very light
B. of the diffusion of oil through the wick
C. of the surface tension phenomenon
D. of the capillary action phenomenon
Explanation:
1498. A persons spectacles have a power of - 2.0. The spectacles have ...... and are .......1. converging lens 2. diverging lens3. for short sight 4. for long sight
A. 1 and 3
B. 1 and 4
C. 2 and 3
D. 2 and 4
Explanation:
1499. If you swim one km, how many miles do you swim ?
A. 0.5
B. 0.62
C. 0.84
D. 1.6
Explanation:
1500. A weather balloon is not fully inflated on the ground because :
A. it cannot rise up in the air when fully inflated
B. it cannot withstand the outside pressure if fully inflated.
C. if the balloon is fully inflated, it may not remain stable in a strom
D. the air inside the balloon expands as it rises and may burst
Explanation:
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