Question : Heavy water is made by ______.
Option 1: dissolving salt of heavy metals in distilled water
Option 2: repeated distillation and condensation of water
Option 3: burning Deuterium in oxygen
Option 4: by burning the heavier isotope of Oxygen and Hydrogen
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Correct Answer: burning Deuterium in oxygen
Solution : The correct option is the burning of deuterium in oxygen.
Heavy water, or deuterium oxide (D2O), is produced by burning deuterium in oxygen. Burning deuterium (a heavy isotope of hydrogen) in oxygen-containing air can result in the production of heavy water (D2O). The chemical process for deuterium combustion in the presence of oxygen may be expressed as 2D2 + O2 → 2D2O.
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Question : Which is a beta-emitting radioactive isotope of hydrogen that has one proton and two neutrons in its nucleus, making it three times as heavy as a hydrogen nucleus and one and a half times heavier than deuterium?
Option 1: Tritium
Option 2: Protium
Option 3: Hydrogen-4
Option 4: Hydrogen-6
Question : Which of the following has deuterium as one of its isotopes?
Option 1: Nitrogen
Option 2: Carbon
Option 3: Hydrogen
Option 4: Oxygen
Question : Alum is made by dissolving bauxite in:
Option 1: Phosphoric acid
Option 2: Citric acid
Option 3: Boric acid
Option 4: Sulphuric acid
Question : What is the term used to refer to the process of conversion of water vapour back to water?
Option 1: Evaporation
Option 2: Sublimation
Option 3: Freezing
Option 4: Condensation
Question : Dry ice is the solid form of_____.
Option 1: carbon dioxide
Option 2: nitrogen
Option 3: oxygen
Option 4: hydrogen
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