Hydrogen Multiple Choice Questions and Answers for Practice

16. The number of H^{2O molecules which are involve in Hydrozen bonding in CuSO4.5H2O molecule itself is}

1. H^3PO2
2. H^3PO3
3. H^3PO4
4. PH³

17. The oxide that gives H₂O₂ on treatment with dilute H₂SO₂ is

1. PbO₂
2. BaO₂ .8H₂O + O₂
3. MnO₂
4. TiO₂

18. True or false: hydrogen is an energy source.

1. True Statement
2. False Statement

19. True/False: hydrogen fuel cell vehicles are electric vehicles

1. False Statement
2. True Statement

20. What can you produce hydrogen from?

1. Water
2. Plants
3. Natural gasl
4. All of the above and more

21. What is the most common element in the world?

1. Hydrogen
2. Oxygen
3. Helium
4. Carbon

22. What is the only by-product of hydrogen fuel-cells?

1. Carbon Dioxide (CO₂, which is a greenhouse gas)
2. Nothing
3. Water vapor
4. Helium

23. What is the strength of 20 volume solution of H^2O2?

1. 5g/L
2. 10g/L
3. 30g/L
4. 60g/L

24. When MnO^{4 reacts with H2O2 in basic medium then following species are involved, except}

1. MnO²
2. O²
3. OH^-
4. Mn²⁺

25. When sodium peroxide is treated with dilute sulphuric acid, we get

1. sodium sulphate and water
2. sodium sulphate and oxygen
3. sodium sulphate, hydrogen and oxygen
4. sodium sulphate and hydrogen peroxide

26. Which group forms hydride?

1. 6
2. 7
3. 8
4. 9

27. Which of the following compounds is used for water softening?

1. Ca₃ (PO₄)₂
2. Na₃PO₄
3. Na₆P₆O₁₈
4. Na₂HPO₄

28. Which of the following hydrides is electron-precise hydride?

1. B₂H₆
2. NH₃
3. H₂O
4. CH₄

29. Which of the following ions will cause hardness in water sample?

1. Ca²⁺
2. Na⁺
3. Cl^-
4. K⁺

30. Which one is ionic hydride in nature?

1. CrH
2. NH³
3. H^2O
4. NaH