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Hydrogen NEET MCQs & Practice Questions

Master core hydrogen topics with NEET-style MCQs, step-by-step answers and short revision notes to strengthen fundamentals before tests.

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Hydrogen Revision Guide for NEET Chemistry

Hydrogen is part of NEET 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 NEET 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.

NEET Chemistry · Hydrogen · Very Hard

1. Which isotope of hydrogen contains one proton and two neutrons?

  • A. Hydronium
  • B. Protium
  • C. Deuterium
  • D. Tritium
Answer: D
Explanation: Tritium, 3H, contains one proton and two neutrons.

NEET Chemistry · Hydrogen · Very Hard

2. Which hydrogen isotope is radioactive?

  • A. Deuterium
  • B. Tritium
  • C. All are stable
  • D. Protium
Answer: B
Explanation: Tritium is radioactive and undergoes beta decay.

NEET Chemistry · Hydrogen · Very Hard

3. The predominant isotope of naturally occurring hydrogen is:

  • A. Equal mixture of all three
  • B. Protium
  • C. Deuterium
  • D. Tritium
Answer: B
Explanation: Natural hydrogen consists overwhelmingly of protium.

NEET Chemistry · Hydrogen · Very Hard

4. Which method is commonly used for laboratory preparation of dihydrogen?

  • A. Heating NaCl
  • B. Electrolysis of molten KCl only
  • C. Reaction of Cu with dilute HCl
  • D. Reaction of zinc with dilute HCl
Answer: D
Explanation: Zinc displaces hydrogen from dilute hydrochloric acid: Zn + 2HCl → ZnCl2 + H2.

NEET Chemistry · Hydrogen · Very Hard

5. Which metal does not liberate hydrogen from dilute hydrochloric acid?

  • A. Cu
  • B. Zn
  • C. Mg
  • D. Fe
Answer: A
Explanation: Copper lies below hydrogen in the electrochemical series and does not displace hydrogen from dilute non-oxidising acids.

NEET Chemistry · Hydrogen · Very Hard

6. Steam reacts with iron to produce:

  • A. Fe2O3 and O2
  • B. FeO and H2O
  • C. Fe and H2O2
  • D. Fe3O4 and H2
Answer: D
Explanation: 3Fe + 4H2O(g) → Fe3O4 + 4H2.

NEET Chemistry · Hydrogen · Very Hard

7. The industrial preparation of hydrogen from methane initially gives:

  • A. CH3OH only
  • B. CO and H2
  • C. CO2 and H2O
  • D. C and H2O
Answer: B
Explanation: Steam reforming: CH4 + H2O → CO + 3H2.

NEET Chemistry · Hydrogen · Very Hard

8. The water-gas shift reaction is:

  • A. CO2 + H2 → CO + H2O only
  • B. C + H2O → CO + H2
  • C. CH4 + H2O → CO + 3H2
  • D. CO + H2O → CO2 + H2
Answer: D
Explanation: Carbon monoxide reacts with steam to form carbon dioxide and additional hydrogen.

NEET Chemistry · Hydrogen · Very Hard

9. Hydrogen behaves as a reducing agent in:

  • A. 2H2 + O2 → 2H2O
  • B. CuO + H2 → Cu + H2O
  • C. H2 + Cl2 → 2HCl
  • D. N2 + 3H2 → 2NH3
Answer: B
Explanation: Hydrogen reduces CuO to Cu and itself is oxidised to water.

NEET Chemistry · Hydrogen · Very Hard

10. Which statement about atomic hydrogen is correct?

  • A. It is less reactive than molecular hydrogen
  • B. It is diamagnetic and inert
  • C. It cannot exist transiently
  • D. It is more reactive than molecular hydrogen
Answer: D
Explanation: Atomic hydrogen is highly reactive because formation of the H–H bond releases substantial energy.

NEET Chemistry · Hydrogen · Very Hard

11. Ortho-hydrogen differs from para-hydrogen in the:

  • A. Isotopic mass
  • B. Relative orientation of nuclear spins
  • C. Number of protons
  • D. Number of electrons
Answer: B
Explanation: In ortho-hydrogen, nuclear spins are parallel; in para-hydrogen, they are antiparallel.

NEET Chemistry · Hydrogen · Very Hard

12. At room temperature, ordinary hydrogen is approximately:

  • A. 25% ortho and 75% para
  • B. 100% para
  • C. 50% ortho and 50% para
  • D. 75% ortho and 25% para
Answer: D
Explanation: At room temperature, the equilibrium mixture is about 75% ortho and 25% para hydrogen.

NEET Chemistry · Hydrogen · Very Hard

13. Which hydride is predominantly ionic?

  • A. H2O
  • B. NaH
  • C. CH4
  • D. NH3
Answer: B
Explanation: Alkali metals form saline or ionic hydrides containing H− ions.

NEET Chemistry · Hydrogen · Very Hard

14. Which hydride is electron-deficient?

  • A. CH4
  • B. NH3
  • C. H2O
  • D. B2H6
Answer: D
Explanation: Diborane has insufficient electrons for conventional two-centre bonds and contains three-centre two-electron bonds.

NEET Chemistry · Hydrogen · Very Hard

15. Which hydride is electron-rich?

  • A. BeH2
  • B. NH3
  • C. B2H6
  • D. CH4
Answer: B
Explanation: NH3 contains a lone pair on nitrogen and is classified as an electron-rich hydride.

NEET Chemistry · Hydrogen · Very Hard

16. Metallic hydrides are generally formed by:

  • A. Halogens
  • B. Noble gases
  • C. Only alkali metals
  • D. d- and f-block metals
Answer: D
Explanation: Many transition and inner-transition metals form interstitial or metallic hydrides.

NEET Chemistry · Hydrogen · Very Hard

17. Which compound contains hydrogen in the −1 oxidation state?

  • A. NH3
  • B. NaH
  • C. HCl
  • D. H2O
Answer: B
Explanation: In ionic hydrides such as NaH, hydrogen exists as hydride ion H−.

NEET Chemistry · Hydrogen · Very Hard

18. Hydrogen has a positive oxidation state in:

  • A. NaH
  • B. CaH2
  • C. LiH
  • D. HCl
Answer: D
Explanation: Hydrogen bonded to a more electronegative non-metal such as chlorine has oxidation state +1.

NEET Chemistry · Hydrogen · Very Hard

19. The shape of H2O is:

  • A. Tetrahedral
  • B. Bent
  • C. Linear
  • D. Trigonal planar
Answer: B
Explanation: Water has two bond pairs and two lone pairs around oxygen, giving a bent molecular shape.

NEET Chemistry · Hydrogen · Very Hard

20. The unusually high boiling point of water is mainly due to:

  • A. High molecular mass
  • B. Ionic bonding
  • C. Metallic bonding
  • D. Intermolecular hydrogen bonding
Answer: D
Explanation: Strong intermolecular hydrogen bonding raises the boiling point of water.

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Hydrogen Practice Tests

Hydrogen Frequently Asked Questions

How should I prepare Hydrogen for NEET 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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