Q110 / 180 · AIIMS 2007 · Physics

Assertion : Heavy water is a better moderator than normal water. Reason : Heavy water absorbs neutrons more efficiently than normal water.

A
If both assertion and reason are true and reason is the correct explanation of assertion
B
If both assertion and reason are true but reason is not the correct explanation of assertion
Correct answer
C
If assertion is true but reason is false
D
If both assertion and reason are false.

Solution

The assertion is true because heavy - water is a better moderator than ordinary water. This is because heavy water absorbs fewer neutrons than normal water.

Hence, the correct answer is option: 'C'.

Relevant Questions

In a nuclear fusion reaction, two nuclei, and fuse to produce a nucleus , releasing an amount of energy in the process. If the mass defects 26 May, 2018Nuclear reactions
A neutron in a nuclear reactor collides head on elastically with the nucleus of a carbon atom initially at rest. The fraction of kinetic ene2017Nuclear reactions
Assertion : Thermonuclear fusion reactions may become the source of unlimited power for the mankind. Reason : A single fusion event involvin2017Nuclear reactions
Assertion : Heavy water is used as moderator in nuclear reactor. Reason: Water cool down the fast neutron.2016Nuclear reactions
Assertion: The ratio for time taken for light emission from an atom to that for release of nuclear energy in fission is . Reason: Time taken2014Nuclear reactions
In nuclear fission, which of the following quantity is conserved ?2013Nuclear reactions