616: Brominated flame retardants are used in many household products like mattresses and upholstery. Why is there some concern about their use?
1. They are highly resistant to degradation in the environment.
2. They are able to accumulate in humans and animals.
Select the correct answer using the code given below.
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
617: Some Buddhist rock-cut caves are called Chaityas, while the others are called Viharas. What is the difference between the two?
(a) Vihara is a place of worship, while Chaitya is the dwelling place of the monks
(b) Chaitya is a place of worship, while Vihara is the dwelling place of the monks
(c) Chaitya is the stupa at the far end of the cave, while Vihara is the hall axial to it
(d) There is no material difference between the two
618: What is the common feature in insects like ant and cockroach?
(a) They bite and chew their food
(b) They live in temperate climate conditions
(c) They have cutting and sucking type of mouth parts
(d) They are social insects
619: Standard of living of a nation can be judged by:
(a) Increase in GNP at factor cost
(b) Increase in GNP at cost including taxes and duties
(c) Increase in NNP at factor cost
(d) None of the above
620: In the given figure, if QRS is an equilateral triangle and QTS is an isosceles triangle and x = 47°, then the value (in degrees) of y will be
(a) 13
(b) 23
(c) 33
(d) 43