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Some statements about heavy water are given below: (a) Heavy water is used as a moderator in nuclear reactors. (b) Heavy water is more associated than ordinary water. (c) Heavy water is more effective solvent than ordinary water. Which of the above statements are correct?

1. (a) (a) and (c)
2. (b) (a) and (b)
3. (c) (a), (b) and (c)
4. (d) (b) and (c)

Correct answer: (b) (a) and (b)

Solution

Heavy water (D₂O) is used as a moderator in nuclear reactors due to its ability to slow down neutrons. It is also more associated than ordinary water because of stronger hydrogen bonding. However, it is not a more effective solvent than ordinary water.

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