Heavy water
Heavy water is a Science & Technology concept from the MPSC syllabus, tested in 3 past MPSC questions (2022, 2024, 2025). Below are those real questions with their correct answers and explanations.
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Real questions that test this
खालीलपैकी कोणत्या समस्थानिकाला जड हायड्रोजन असे म्हणतात ? From the following which isotope is called as heavy hydrogen ?
(a)प्रोटीयम / Protium
(b)ड्युटेरिअम / Deuterium
(c)ट्रिटीअम / Tritium
(d)वरीलपैकी काहीही नाही / None of the above
Deuterium (²H or D), an isotope of hydrogen containing one proton and one neutron, is commonly known as heavy hydrogen and is used to produce heavy water (D₂O).
हायड्रोजनचे समस्थानिके आणि त्यांचे अनुक्रमे वस्तुमान गुणोत्तर ________ आहे. The isotopes of hydrogen and their respective mass ratio are ________.
The isotopes of hydrogen are Protium, Deuterium, and Tritium, with mass numbers 1, 2, and 3 respectively, giving a mass ratio of 1 : 2 : 3.
न्युक्लीयर भट्टीमध्ये नियामक (जड जल) हा का वापरला जातो ? In nuclear reactors, why is moderator (heavy water) used ?
(a)न्युक्लीयर भट्टी थंड करण्यासाठी / To cool the nuclear reactor
(b)न्युट्रॉनची ऊर्जा वाढविण्यासाठी / To enhance the energy of neutrons
(c)न्युट्रॉनची ऊर्जा कमी होऊन त्याचा वेग मंद व्हावा, आणि त्याचे प्रग्रहण व्हावे म्हणून / To reduce the energy and hence the speed of neutron so that it slows down and gets captured
In nuclear reactors, heavy water acts as a moderator to slow down fast-moving neutrons so that they can effectively sustain the fission chain reaction.