41ˢᵗ B.P.S.C. (Pre) 1996

Heavy water is that water –

aThe temperature of which is kept constant at 4°C

bIn which insoluble salts of Calcium and Potassium are present

cIn which isotopes takes the place of Hydrogen✓ Correct

dIn which isotopes takes the place of Oxygen

Explanation

Deuterium is an isotope of hydrogen. If water is formed with deuterium in place of ordinary hydrogen, then it is called heavy water. Its chemical formula is D2O.

general-science