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Dihydrogen MCQs

1. Which of the following statements is true regarding the density of isotopes of the hydrogen?

a) protium’s density is greater than that of tritium

b) tritium’s density is greater than that of deuterium

c) deuterium’s density is greater than that of tritium

d) protium’s density is greater than that of deuterium

Answer: tritium’s density is greater than that of deuterium

2. Which of the following as a greatest relative atomic mass?

a) tritium

b) protium

c) deuterium

d) all have equal mass

Answer: tritium

3. Deuterium has a melting point higher than that of hydrogen.

a) true

b) false

Answer: true

4. Protium has a greater relative abundance than tritium.

a) true

b) false

Answer: true

5. Which of the following option is true regarding the boiling point of hydrogen isotopes?

a) all three isotopes have an equal boiling point

b) deuterium has a greater boiling point than tritium

c) tritium has a greater boiling point than that of protium

d) protium has a higher boiling point than that of tritium

Answer: tritium has a greater boiling point than that of protium

6. Deuterium is also known as _________

a) dark hydrogen

b) heavy hydrogen

c) light hydrogen

d) radioactive hydrogen

Answer: heavy hydrogen

7. What is the half-life of atomic hydrogen?

a) 0.33s

b) 1.33s

c) 2.33s

d) 3.33s

Answer: 0.33s

8. How much percent of the total mass of the Universe is dihydrogen?

a) 60

b) 17

c) 65

d) 70

Answer: 70

9. Which of the following is not an isotope of hydrogen?

a) helium

b) protium

c) deuterium

d) tritium

Answer: helium

10. Which of the following is Radioactive?

a) protium

b) tritium

c) chlorine

d) deuterium

Answer: protium

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Categories: Hydrogen