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s-Block Elements (Hydrogen) WBJEE MCQ & Practice Questions
Practice s-Block Elements (Hydrogen) MCQs for WBJEE Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.
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s-Block Elements (Hydrogen) is part of WBJEE 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.
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Exam-style MCQs
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Top 20 s-Block Elements (Hydrogen) MCQs with Answers
These public questions are selected from the exact s-Block Elements (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.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
1. The electronic configuration of hydrogen in its ground state is:
Answer: C
Explanation: Hydrogen has one electron occupying the 1s orbital.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
2. Hydrogen resembles alkali metals because it has:
Answer: B
Explanation: Like Group 1 elements, hydrogen has one valence electron.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
3. Hydrogen resembles halogens because it requires how many electrons to complete its valence shell?
Answer: A
Explanation: Hydrogen needs one additional electron to attain the helium configuration.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
4. The most abundant isotope of hydrogen is:
Answer: D
Explanation: Protium, 1H, is overwhelmingly the most abundant hydrogen isotope.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
5. Deuterium contains:
Answer: C
Explanation: Deuterium is 2H with one proton and one neutron.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
6. Tritium contains:
Answer: B
Explanation: Tritium is 3H.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
7. Which isotope of hydrogen is radioactive?
Answer: A
Explanation: Tritium undergoes beta decay.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
8. D2O is commonly called:
Answer: D
Explanation: D2O is deuterium oxide, known as heavy water.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
9. Heavy water is used in some nuclear reactors primarily as a:
Answer: C
Explanation: D2O can slow neutrons with relatively low neutron absorption.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
10. Hydrogen gas is commonly prepared in the laboratory by reaction of dilute acid with:
Answer: B
Explanation: Zinc with dilute HCl or H2SO4 liberates H2.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
11. Zn + 2HCl produces:
Answer: A
Explanation: Zinc displaces hydrogen from dilute hydrochloric acid.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
12. Industrially, hydrogen can be produced from methane by:
Answer: D
Explanation: Steam reforming of methane is a major industrial hydrogen route.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
13. The water-gas shift reaction converts CO and H2O mainly into:
Answer: C
Explanation: CO + H2O gives CO2 + H2.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
14. Hydrogen burns in oxygen to form mainly:
Answer: B
Explanation: Combustion of hydrogen produces water.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
15. A mixture of hydrogen and oxygen can be:
Answer: A
Explanation: Hydrogen-oxygen mixtures can ignite explosively.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
16. Hydrogen acts as a reducing agent toward heated metal oxides such as CuO because it:
Answer: D
Explanation: H2 reduces certain metal oxides while being oxidised to water.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
17. Hydrogen combines with nitrogen in the Haber process to produce:
Answer: C
Explanation: N2 + 3H2 ⇌ 2NH3.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
18. Hydrogenation of vegetable oils commonly uses hydrogen with a catalyst such as:
Answer: B
Explanation: Ni is a common catalyst for addition of H2 to C=C bonds.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
19. Hydrogen is considered a clean fuel at the point of use because its ideal combustion product is:
Answer: A
Explanation: Ideal H2 combustion produces water and no carbon dioxide.
WBJEE Chemistry · s-Block Elements (Hydrogen) · Very Very Hard
20. A major challenge in using hydrogen as a fuel is:
Answer: D
Explanation: Low volumetric energy density and handling requirements complicate storage.
s-Block Elements (Hydrogen) Practice Tests
Chapter 13 Hydrogen Set 01
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 02
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 03
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 04
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 05
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 06
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 07
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 08
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 09
Chapter-wise Practice · Very Very Hard
Chapter 13 Hydrogen Set 10
Chapter-wise Practice · Very Very Hard
s-Block Elements (Hydrogen) Frequently Asked Questions
How should I prepare s-Block Elements (Hydrogen) for WBJEE 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 s-Block Elements (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.
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