• # question_answer Which of the following is correct about heavy water [DCE 2002] A) Water at 4°C having maximum density is known as heavy water B) It is heavier than water $({{H}_{2}}O)$ C) It is formed by the combination of heavier isotope of hydrogen and oxygen D) None of these

Heavy water is formed by the combination of heavier isotope $({{\,}_{1}}{{H}^{2}}\text{ or }D)$ with oxygen. $2{{D}_{2}}+{{O}_{2}}\to \underset{\text{Heavy water}}{\mathop{2{{D}_{2}}O}}\,$