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.
Play all 15 questions freeSample questions
Which isotope of hydrogen is radioactive?
- Protium
- Deuterium
- Tritium
- None of the above
Show answer
Answer: C. Tritium
Tritium, with one proton and two neutrons, is radioactive.
Hydrogen bonds are strongest between which molecule pairs?
- H2 and H2
- H2O and H2O
- H2 and H2O
- 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.
What is the role of hydrogen in Haber's process?
- It acts as a catalyst.
- It is a reactant in the synthesis of ammonia.
- It is a product in the synthesis of ammonia.
- 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.
What is syngas and how is it produced?
- A mixture of CO and H2 produced by coal gasification
- A mixture of CO2 and H2O
- Pure hydrogen gas
- 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.
Discuss the role of hydrogen in fuel cells and their advantages over conventional combustion engines.
- Hydrogen fuel cells produce electricity directly without combustion, emitting only water vapor, offering high efficiency and zero emissions
- Hydrogen fuel cells produce more pollution than combustion engines
- Hydrogen fuel cells are less efficient than combustion engines
- 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.