Hydrogen Quiz - CBSE Class 11 Science

Free practice quiz: Hydrogen (CBSE Class 11 Science). 15 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Science practice quiz has 15 multiple-choice questions on Hydrogen, and 15 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which isotope of hydrogen is radioactive?

   1. Protium
   2. Deuterium
   3. Tritium
   4. None of the above
   Show answer

   Answer: C. Tritium

   Tritium, with one proton and two neutrons, is radioactive.

2. Hydrogen bonds are strongest between which molecule pairs?

   1. H2 and H2
   2. H2O and H2O
   3. H2 and H2O
   4. HCl and HCl
   Show answer

   Answer: B. H2O and H2O

   Hydrogen bonds are strongest when hydrogen is bonded to a highly electronegative atom like oxygen in water.

3. What is the role of hydrogen in Haber's process?

   1. It acts as a catalyst.
   2. It is a reactant in the synthesis of ammonia.
   3. It is a product in the synthesis of ammonia.
   4. It plays no role in the process.
   Show answer

   Answer: B. It is a reactant in the synthesis of ammonia.

   Hydrogen is a key reactant along with nitrogen in the industrial synthesis of ammonia.

4. What is syngas and how is it produced?

   1. A mixture of CO and H2 produced by coal gasification
   2. A mixture of CO2 and H2O
   3. Pure hydrogen gas
   4. None of the above
   Show answer

   Answer: A. A mixture of CO and H2 produced by coal gasification

   Syngas, or synthesis gas, is a mixture of carbon monoxide and hydrogen used as a fuel and in chemical synthesis.

5. Discuss the role of hydrogen in fuel cells and their advantages over conventional combustion engines.

   1. Hydrogen fuel cells produce electricity directly without combustion, emitting only water vapor, offering high efficiency and zero emissions
   2. Hydrogen fuel cells produce more pollution than combustion engines
   3. Hydrogen fuel cells are less efficient than combustion engines
   4. None of the above
   Show answer

   Answer: A. Hydrogen fuel cells produce electricity directly without combustion, emitting only water vapor, offering high efficiency and zero emissions

   Fuel cells offer cleaner and more efficient energy conversion compared to traditional combustion.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the common oxidation state of hydrogen?
2. What is the formula for the hydrogen molecule?
3. What is the process called when hydrogen gas reacts with unsaturated hydrocarbons?
4. Explain the process of electrolysis of water.
5. Explain how hydrogen acts as a reducing agent.
6. What are the applications of hydrogen in the petroleum industry?
7. Discuss the challenges associated with the large-scale use of hydrogen as a fuel.
8. Compare and contrast the properties of protium, deuterium, and tritium.
9. Analyze the economic and environmental implications of using hydrogen as an alternative energy source. Discuss its potential and limitations.
10. Critically evaluate the feasibility and challenges of a hydrogen-based economy. Consider technological, economic, and societal factors.

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