146: In which of the following cities one can never see the sun shine overhead at noon?
(a) Delhi
(b) Visakhapatnam
(c) Trivandrum
(d) Bangalore
147: The Rowlatt Act aimed at
(a) compulsory economic support to war efforts
(b) imprisonment without trial and summary procedures for trial
(c) suppression of the Khilafat Movement
(d) imposition of restrictions on freedom of the press
148: Graphene is frequently in news recently. What is its importance?
1. It is a two-dimensional material and has good electrical conductivity.
2. It is one of the thinnest but strongest materials tested so far.
3. It is entirely made of silicon and has high optical transparency.
4. It can be used as 'conducting electrodes' required for touch screens, LCDs and organic LEDs.
Which of the statements given above are correct?
(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 2 and 4 only
(d) 1, 2, 3 and 4
149: Which of the following rivers has a bird's foot delta?
(a) The Amazon
(b) The Brahmaputra
(c) The Mississippi
(d) The Nile
150: A tree species in Mauritius failed to reproduce because of the extinction of a fruit-eating bird. Which one of the following was that bird ?
(a) Dove
(b) Dodo
(c) Condor
(d) Skua