Heavy water of an atomic reactor is :

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UPSC CAPF(AC) Exam 2015 Questions Solved

Question 95 Two racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such dial each car makes a complete circle in the same time V. The ratio of angular speed of the first to that of the second car is:
A) m1 : m2
B) 1 : 1CA
C) r1 : r2
D) 1 : 2
Answer: B) 1 : 1

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Question 96 Heavy water of an atomic reactor is :

A) deionised water
B) an oxide of heavier isotope of oxygen
C) a mixture of ice and water
D) an oxide of heavier isotope of hydrogen

Answer: B) an oxide of heavier isotope of oxygen

Question 97 In a radioactive decay of a nucleus, an electron is also emitted. This may happen due to the fact that :

A) electrons are present inside a nucleus
B) an electron is created at the time of conversion of a neutron into proton
C) electron is created at the time of conversion of a proton into a neutron
D) electrons need lo be emitted for conservation of momentum

Answer: C) electron is created at the time of conversion of a proton into a neutron