641: Consider the following Pairs : Hills Region
1. Cardamom Hills : Coromandel Coast
2. Kaimur Hills : Konkan Coast
3. Mahadeo Hills : Central India
4. Mikir Hills : North-East India
Which of the above pairs is/are correctly matched?
(a) 1 and 2
(b) 2 and 3
(c) 3 and 4
(d) 2 and 4
642: The working principle of a washing machine is
(a) centrifugation
(b) dialysis
(c) reverse osmosis
(d) diffusion
643: Which of the following characterizes/characterize the people of Indus Valley Civilization?
1. They possessed great palaces and temples.
2. They worshiped both male and female deities.
3. They employed horse-drawn chariots in warfare.
Select the correct statement/statements using the codes given below.
(a) 2 only
(b) 1 and 2 only
(c) 1, 2 and 3
(d) None is correct
644: The theme of the World Development Report, 2001 is
(a) From Plan to Market
(b) Knowledge for Development
(c) Attacking Poverty
(d) The State in the Changing World
645: LMNOP, is a semi-circle with centre at R and diameter LP, LSR and RQP are also semi-circles with centres at T and U and diameters LR = RP = 1/2 LP. The ratio of perimeters of LMNOP and LSRQP is
(a) 0.75 : 1
(b) 1 : 1
(c) 1 : 0.75
(d) 1.25 : 1