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Hydrogen WBCHSE Class 11 MCQ & Practice Questions

Practice Hydrogen MCQs for WBCHSE Class 11 Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

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Hydrogen Revision Guide for WBCHSE Class 11 Chemistry

Hydrogen is part of WBCHSE Class 11 Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

Use the sample MCQs on this page to check understanding, then attempt the related ChemNexa tests for broader practice. When an answer is wrong, review the explanation and return to the underlying concept before attempting another set.

Important Topics

  • Core definitions and principles
  • Important equations or relationships
  • Common applications and examples
  • Frequently confused concepts
  • Exam-style multiple-choice questions
  • Error review and targeted revision

Revision Tip

Create a one-page summary of trends, structures, reactions, exceptions and key terminology for Hydrogen, then test recall with mixed MCQs.

What to practise in Hydrogen

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Hydrogen before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for WBCHSE Class 11 Chemistry.

Performance Practice

Attempt ChemNexa tests, review results and return to weak areas for another round of targeted revision.

Top 20 Hydrogen MCQs with Answers

These public questions are selected from the exact Hydrogen chapter, screened for topic relevance and deduplicated so repeated versions of the same MCQ are not shown publicly. Use them for quick revision, then sign in to attempt the complete test experience with more questions, results and performance review.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

1. The electronic configuration of hydrogen is:

  • A. 2s1
  • B. 2p1
  • C. 1s1
  • D. 1s2
Answer: C
Explanation: Hydrogen has one electron in the 1s orbital.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

2. Hydrogen resembles alkali metals because it has:

  • A. Two valence electrons
  • B. One valence electron
  • C. Seven valence electrons
  • D. A filled valence shell
Answer: B
Explanation: Like Group 1 elements, hydrogen has one valence electron.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

3. Hydrogen resembles halogens because it needs:

  • A. One electron to complete its valence shell
  • B. Two electrons to complete its shell
  • C. No electron
  • D. Three electrons
Answer: A
Explanation: Hydrogen can gain one electron to attain the helium configuration.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

4. The most abundant isotope of hydrogen is:

  • A. Deuterium
  • B. Tritium
  • C. Hydronium
  • D. Protium
Answer: D
Explanation: Protium, 1H, is overwhelmingly the most abundant hydrogen isotope.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

5. Deuterium contains:

  • A. Two protons and one neutron
  • B. One neutron only
  • C. One proton and one neutron
  • D. One proton and two neutrons
Answer: C
Explanation: Deuterium has mass number 2: one proton and one neutron.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

6. Tritium contains:

  • A. Three protons
  • B. One proton and two neutrons
  • C. One proton and one neutron
  • D. Two protons and one neutron
Answer: B
Explanation: Tritium has mass number 3 with one proton and two neutrons.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

7. Which hydrogen isotope is radioactive?

  • A. Tritium
  • B. Protium
  • C. Deuterium
  • D. All are equally radioactive
Answer: A
Explanation: Tritium is a radioactive isotope of hydrogen.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

8. The symbol for deuterium is commonly:

  • A. T
  • B. P
  • C. H2+
  • D. D
Answer: D
Explanation: Deuterium is conventionally represented as D or 2H.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

9. The symbol for tritium is commonly:

  • A. P
  • B. H-
  • C. T
  • D. D
Answer: C
Explanation: Tritium is represented as T or 3H.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

10. Laboratory preparation of H2 commonly uses zinc with:

  • A. Cl2
  • B. Dilute HCl
  • C. Concentrated HNO3
  • D. NaOH only
Answer: B
Explanation: Zn reacts with dilute non-oxidising acids such as HCl to release hydrogen.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

11. Hydrogen can be produced by electrolysis of:

  • A. Water
  • B. Dry NaCl crystals only
  • C. Carbon dioxide
  • D. Nitrogen
Answer: A
Explanation: Electrolysis of water generates hydrogen and oxygen.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

12. Hydrogen burns in oxygen to form:

  • A. Hydrogen peroxide only
  • B. Ozone
  • C. Hydride ion
  • D. Water
Answer: D
Explanation: Combustion of hydrogen produces water.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

13. Hydrogen acts as a reducing agent because it can:

  • A. Oxidise all metals
  • B. Form only ionic compounds
  • C. Remove oxygen from some metal oxides
  • D. Always donate O2
Answer: C
Explanation: Hydrogen can reduce suitable metal oxides while itself forming water.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

14. The reaction CuO + H2 on heating gives:

  • A. CuOH + H
  • B. Cu + H2O
  • C. CuH2 + O2
  • D. Cu2O + H2O2
Answer: B
Explanation: Hydrogen reduces copper(II) oxide to copper.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

15. Hydrogen is used industrially in the Haber process to manufacture:

  • A. Ammonia
  • B. Sulfuric acid
  • C. Chlorine
  • D. Sodium carbonate only
Answer: A
Explanation: Nitrogen reacts with hydrogen to form ammonia in the Haber process.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

16. Hydrogenation of vegetable oils commonly uses:

  • A. O2 only
  • B. N2 with acid
  • C. CO2 with base
  • D. H2 with a metal catalyst
Answer: D
Explanation: Hydrogen adds across unsaturated bonds in presence of catalysts such as Ni.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

17. A binary compound of hydrogen with another element is called a:

  • A. Peroxide
  • B. Halide
  • C. Hydride
  • D. Hydrate
Answer: C
Explanation: Binary hydrogen compounds are termed hydrides.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

18. Hydrides of highly electropositive s-block metals are mainly:

  • A. Peroxides
  • B. Ionic or saline hydrides
  • C. Molecular hydrides
  • D. Metallic oxides
Answer: B
Explanation: Many Group 1 and Group 2 metals form ionic H- containing hydrides.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

19. NaH is classified as a:

  • A. Saline hydride
  • B. Covalent hydride
  • C. Interstitial hydride
  • D. Hydrogen-bonded hydride
Answer: A
Explanation: Sodium hydride contains Na+ and H- and is ionic.

WBCHSE Class 11 Chemistry · Hydrogen · Very Hard

20. CH4 is classified primarily as a:

  • A. Saline hydride
  • B. Interstitial hydride
  • C. Ionic peroxide
  • D. Covalent hydride
Answer: D
Explanation: Methane is a molecular covalent hydride of carbon.

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Hydrogen Practice Tests

Hydrogen Frequently Asked Questions

How should I prepare Hydrogen for WBCHSE Class 11 Chemistry?

Revise the core concepts first, make a short list of important relationships or exceptions, and then solve chapter-focused MCQs while reviewing every error.

How can ChemNexa help with Hydrogen practice?

This page provides public sample questions and links to published ChemNexa tests so you can combine quick revision with structured practice.

What should I do after getting an MCQ wrong?

Identify whether the mistake came from a concept gap, calculation, unit, sign, wording or memory error, review that point, and then attempt a similar question again.

Continue with another chapter to build connected concepts and strengthen your overall Chemistry preparation.

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