2481: Galvanising of sheet iron is done by dipping the sheet metal into molten
(a) Mercury
(b) Cadmium
(c) Lead
(d) Zinc
2482: National Income is the
(a) Net National Product at market price
(b) Net National Product at factor cost
(c) Net Domestic Product at market price
(d) Net Domestic Product at factor cost
2483: Assertion (A) :
Drinking of whisky increases the frequency of urination.
Reason (R) :
Alcohol intake speeds up the secretion of vasopressin in the body.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
2484: A radioactive substance has a half-life of four months. Three-fourth of the substance would decay in
(a) 3 months
(b) 4 months
(c) 8 months
(d) 12 months
2485: Ten per cent of twenty plus twenty per cent of ten equals
(a) 10 per cent of 20
(b) 20 per cent of 20
(c) 1 per cent of 200
(d) 2 per cent of 200