Isotopes of hydrogen include protium, deuterium, and tritium. Which one is radioactive?
A. Tritium
B. Deuterium
C. Protium
D. Both protium and deuterium
Answer: Option A
Solution (By JKExamLibrary)
Tritium (³H) is a radioactive isotope with a half-life of ~12.3 years, decaying by beta emission to ³He. Protium (¹H) and deuterium (²H) are stable. Tritium is used in self-luminous paints, tracer studies, and nuclear fusion. It occurs naturally in very small amounts from cosmic rays but is mainly produced in nuclear reactors.
Explanation:
Two or more substances (SO₂ and O₂) combine to form a single product (SO₃). This is a combination reaction. It is also a redox reaction and is catalyzed by V₂O₅ in the Contact process for sulfuric acid. Decomposition is the opposite (breaking down). Displacement involves replacement of an element.
Explanation:
Hydrogen fuel cells combine H₂ and O₂ to produce electricity, heat, and water. It is a clean energy source. Coal, diesel, kerosene are conventional fuels burned in engines.
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