2201: 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
2202: The escape velocity from the earth's surface is about:
(a) 30 km/sec
(b) 6 km/sec
(c) 11.2 km/sec
(d) 300 km/sec
2203: Indian National Congress was founded by:
(a) W. C. Bannerjee
(b) A. O. Hume
(c) Mahatma Gandhi
(d) Annie Besant
2204: Consider the following statements:
1. The First Session of the Indian National Congress was held in Calcutta.
2. The Second Session of the Indian National Congress was held under the presidentship of Dadabhai Naoroji.
3. Both Indian National Congress and Muslim League held their sessions at Lucknow in 1916 and concluded the Lucknow Pact.
Which of the statements given above is/are correct?
(a) 1 and 2
(b) 2 only
(c) 2 and 3
(d) 3 only
2205: Which pair is correct ?
(a) Sea horse, Sea cucumber, Sea urchin
(b) Star fish, Cuttle fish, Dog
(c) House fly, Dragon fly, Butterfly
(d) Earthworm, Ringworm, Tapeworm