21: Angora wool is obtained from a breed of
(a) Rabbit
(b) Sheep
(c) Goat
(d) Fox
22: Consider the following statements :
In a nuclear reactor, self-sustained chain reaction is possible, because
I. more neutrons are released in each of the fission reactions.
II. the neutrons immediately take part in the fission process.
III. the fast neutrons are slowed down by Graphite.
IV. every neutron realeased in the fission reaction initiates further fission.
Which of these statements are correct ?
(a) I, II and III
(b) I and III
(c) II and IV
(d) II, III and IV
23: Which of the following pairs is correctly matched ?
(a) Dewan-i-bandagani : Tughlaq
(b) Dewan-i-Mustakhraj : Balban
(c) Dewan-i-Kohi : Alauddin Khilji
(d) Dewan-i-Arz : Muhammad Tughlaq
24: What number will come next in the following series?
5, 8, 9, 14, 16, 23, 26
(a) 29
(b) 33
(c) 35
(d) 39
25: Which one of the following rivers thrice forks into two streams and reunites a few miles farther on, thus forming the islands of Srirangappattanam, Sivasamudram and Srirangam ?
(a) Cauvery
(b) Tungabhadra
(c) Krishna
(d) Godavari