Exams › NEET › Chemistry

Heavy water \( \left(D_{2} O\right) \) is used in Atomic Reactors as -

1. Coolant
2. Controller
3. shield
4. Moderator

Correct answer: Moderator

Solution

Heavy water is used as a moderator because it reduces the speed of fast neutrons to thermal energies while absorbing relatively few neutrons. This makes the chain reaction more likely to continue in the reactor core.

Related NEET Chemistry questions

• A radioactive atom ' \( X^{\prime} \) emits a \( \beta- \) particle to produce an atom ' \( Y \) ' which then emits an \( \alpha \) -particle to given an \( \operatorname{atom}^{\prime} Z^{\prime}: \) (1) The atomic number of ' \( X^{\prime} \) is less than that of \( ^{\prime} Z^{\prime} \) (2) The atomic number of ' \( Y \) ' is less than that of \( ^{\prime} Z^{\prime} \) (3) The mass number of ' \( X^{\prime} \) is same as that of ' \( Y \)
• ⁹²U²³⁵ nucleus absorbs a neutron and disintegrates into ⁵⁴Xe¹³⁹, ³⁸Sr⁹⁴ and x. So what will be the product x?
• Among the following organic acids, the acid present in rancid butter is:
• A ketone has molar mass \( 86 . \) Which of the following cannot be IUPAC name of this ketone?
• An ideal gas is compressed in a closed container its U?
• Which of the following will change the value of the equilibrium constant for the reaction? \( N_{2}(g)+O_{2}(g) \leftrightharpoons 2 N O(g) \)

⚔️ Practice NEET Chemistry free + battle 1v1 →