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Multiple Choice Question with Only One Choice Correct
The sky looks blue because
(a) sunlight turns blue after reflection from the planets and the moon
(b) the sky is illuminated by light from the blue oceans
(c) sunlight is diffracted by dust particles in the atmosphere
(d) the light scattered by the dust particles and air molecules is predominantly blue

Chemistry

Fill in the Blank :
Carbonyl carbon of an aldehyde or a ketone is ________ hybridized.

Mathematics

The number of integral points (integral point means both the coordinates should be integer) that lie exactly in the interior of the triangles with vertices (0, 0), (0, 21) and (21, 0) is

(a)	133	(b)	190
(c)	233	(d)	105

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