3406: 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
3407: A person travelled a distance of 50 km in 8 hours. He covered a part of the distance on foot at the rate of 4 km per hour and a part on a bicycle at the rate of 10 km per hour. How much distance did he travel on foot?
(A) 20 km
(B) 10 km
(C) 40 km
(D) 30 km
3408: Southeast Asia has captivated the attention of global community over space and time as a geostrategically significant region. Which among the following is the most convincing explanation for this global perspective ?
(a) It was the hot theatre during the Second World War
(b) Its location between the Asian powers of China and India
(c) It was the arena of superpower confrontation during the Cold War period
(d) Its location between the Pacific and Indian oceans and its pre-eminent maritime character
3409: Which one of the following pair is not correctly matched?
City : River
(a) Berlin : Rhine
(b) London : Thames
(c) New York : Hudson
(d) Vienna : Danube
3410: Consider the following countries of South Asia
(a) Bangladesh
(b) India
(c) Pakistan
(d) Sri Lanka
The descending order of literacy status of these countries is
(a) 4, 2, 1, 3
(b) 2, 4, 3, 1
(c) 4, 2, 3, 1
(d) 2, 4, 1, 3