3651: Radio carbon dating process is used to know the age of:
(a) Fossils
(b) Plants
(c) Rocks
(d) All of these
3652: Consider the following statements about acetylene :
I. It is used in welding industry.
II. It is raw material for preparing plastics.
III. It is easily obtained by mixing silicon carbide and water.
Of these statements :
(a) I and II are correct
(b) I and III are correct
(c) II and III are correct
(d) I, II and III are correct
3653: A rise in general level of prices may be caused by
1. an increase in the money supply
2. a decrease in the aggregate level of output
3. an increase in the effective demand
Select the correct answer using the codes given below.
(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2 and 3
3654: A complete cycle of a traffic light takes 60 seconds. During each cycle the light is green for 25 second, yellow for 5 second and red for 30 second. At a randomly chosen time, the probability that the light will not be green is
(a) 1/3
(b) 1/4
(c) 5/12
(d) 7/12
3655: Wisdom teeth normally grow during the age of:
(a) 34-----40 years
(b) 12-----15 years
(c) 17------30 years
(d) 40------45 years