Hydrogen & s-Block Elements JEE Main PYQs PDF, 2020–2024

This chapter was removed from the JEE Main syllabus in 2024. These are older PYQs. See what changed →

Hydrogen & s-Block Elements has 134 questions in JEE Main papers from 2020 to 2024, about 27 per year across all shifts. All 134 are in the free PDF, with an answer key. The most asked topic is Alkali Metals (33 questions), followed by Hydrogen and Hydrides (32) and Alkaline Earth Metals (29).

Asked in JEE Main: 1342020–2024, all shifts
In this free PDF: 134all of them, with answers
Asked in 2024: 1Latest paper: 2024 Apr S2
Most asked topic: Alkali Metals33 Qs · 24% of the chapter
Difficulty mix: 72% easy · 28% mediumof the questions in the PDF

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Source: official NTA JEE Main papers · Updated 17 Oct 2026

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4 of this chapter's questions came back in a later paper (2021–2026). See the most repeated.

How often it's asked in JEE Main

Hydrogen & s-Block Elements was removed from the JEE Main syllabus in 2024. It had about 1.2 questions per shift in 2020–22 and almost none since.

It came up in about one of the 2024–26 shifts in our bank. Question types in 2020–2026: about 127 MCQs and about 7 numerical.

How many questions from Hydrogen & s-Block Elements in JEE Main, year by year

Year	Questions	Per shift	MCQ	Numerical
2026	0	0	0	0
2025	0	0	0	0
2024	1	<0.1	1	0
2023	51	2.1	48	3
2022	28	1.2	27	1
2021	39	1.5	37	2
2020	15	0.9	14	1
2020–2026	134	0.9	127	7

Most asked Hydrogen & s-Block Elements topics, 2020–2026

Topic	Questions
Alkali Metals	33
Hydrogen and Hydrides	32
Alkaline Earth Metals	29
Anomalous Behaviour of Li and Be	21
Hydrogen Peroxide	19

Counted from PrepWiser's question bank of JEE Main papers, 2020–2026. Per shift = questions that year ÷ shifts in our bank. Updated 17 Oct 2026.

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See what was removed in 2024 →

Hydrogen & s-Block Elements questions per year

Year	Asked	In PDF
2024	1	1
2023	51	51
2022	28	28
2021	39	39
2020	15	15

Topic-wise weightage by year

How many Hydrogen & s-Block Elements questions each topic had in every JEE Main year (all shifts), counting every question asked, including ones not in the PDF. Darker cells mean more questions.

Topic	Asked	Share	2024	2023	2022	2021	2020
Alkali Metals	33	24%	1	14	6	10	2
Hydrogen and Hydrides	32	24%	·	11	6	12	3
Alkaline Earth Metals	29	22%	·	11	5	8	5
Anomalous Behaviour of Li and Be	21	16%	·	9	6	4	2
Hydrogen Peroxide	19	14%	·	6	5	5	3
All topics	134	100%	1	51	28	39	15

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Newest questions (2024)

The only JEE Main 2024 Hydrogen & s-Block Elements question in the free PDF.

JEE Main 2024 · 6 Apr · Shift 2 · Alkali Metals

Match List I with List II.

	LIST I Alkali Metal		LIST II Emission Wavelength in nm
A.	Li	I.	589.2
B.	Na	II.	455.5
C.	Rb	III.	670.8
D.	Cs	IV.	780.0

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Sample questions from recent papers

JEE Main 2023 · 15 Apr · Shift 1 · Hydrogen and Hydrides

During water-gas shift reaction

(A)water is evaporated in presence of catalyst.
(B)carbon monoxide is oxidized to carbon dioxide.
(C)carbon is oxidized to carbon monoxide.
(D)carbon dioxide is reduced to carbon monoxide.

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Answer: (B)

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JEE Main 2023 · 15 Apr · Shift 1 · Anomalous Behaviour of Li and Be

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :

Assertion (A) :

\mathrm{BeCl}_{2}

and

\mathrm{MgCl}_{2}

produce characteristic flame

Reason (R) : The excitation energy is high in

\mathrm{BeCl}_{2}

and

\mathrm{MgCl}_{2}

In the light of the above statements, choose the correct answer from the options given below :

(A) $\mathrm{(A)}$ is true but $(\mathrm{R})$ is false
(B)Both (A) and $(\mathrm{R})$ are true and $(\mathrm{R})$ is the correct explanation of $(A)$
(C)(A) is false but (R) is true
(D)Both (A) and (R) are true but (R) is NOT the correct explanation of (A)

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Answer: (C)

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JEE Main 2023 · 13 Apr · Shift 2 · Alkaline Earth Metals

Better method for preparation of $\mathrm{BeF}_{2}$ , among the following is :

(A) $\mathrm{BeH}_{2}+\mathrm{F}_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{BeF}_{2}$
(B) $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{BeF}_{4} \stackrel{\Delta}{\longrightarrow} \mathrm{BeF}_{2}$
(C) $\mathrm{Be}+\mathrm{F}_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{BeF}_{2}$
(D) $\mathrm{BeO}+\mathrm{C}+\mathrm{F}_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{BeF}_{2}$

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Answer: (B)

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JEE Main 2023 · 12 Apr · Shift 1 · Alkali Metals

The density of alkali metals is in the order :

(A) $\mathrm{Na}<\mathrm{K}<\mathrm{Cs}<\mathrm{Rb}$
(B) $\mathrm{K}<\mathrm{Na}<\mathrm{Rb}<\mathrm{Cs}$
(C) $\mathrm{K}<\mathrm{Cs}<\mathrm{Na}<\mathrm{Rb}$
(D) $\mathrm{Na}<\mathrm{Rb}<\mathrm{K}<\mathrm{Cs}$

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Answer: (B)

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JEE Main 2023 · 8 Apr · Shift 2 · Hydrogen Peroxide

Which of the following can reduce decomposition of $\mathrm{H}_{2} \mathrm{O}_{2}$ on exposure to light :

(A)Urea
(B)Glass containers
(C)Alkali
(D)Dust

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Answer: (A)

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The free PDF above has all 134 questions grouped by topic, with an answer key.

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Frequently asked

How many questions come from Hydrogen & s-Block Elements in JEE Main?

134 questions from 2020 to 2024, about 27 per year. In 2024 it had 1.

Which Hydrogen & s-Block Elements topics are most important for JEE Main?

By past papers: Alkali Metals (24%), Hydrogen and Hydrides (24%) and Alkaline Earth Metals (22%) of all Hydrogen & s-Block Elements questions.

Is the Hydrogen & s-Block Elements PYQ PDF free?

Yes. The PDF and its answer key are free, and you can practise the questions online with no login, with step-by-step solutions where available.

Prefer to solve online? Practise Hydrogen & s-Block Elements online with step-by-step solutions where available, or work through JEE Main papers shift by shift.

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JEE Main PYQs by year: 2026 · 2025 · 2024 · 2023 · 2022 · 2021 · 2020

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Hydrogen & s-Block Elements JEE Main PYQs PDF, 2020–2024

How often it's asked in JEE Main

How many questions from Hydrogen & s-Block Elements in JEE Main, year by year

Most asked Hydrogen & s-Block Elements topics, 2020–2026

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Hydrogen & s-Block Elements questions per year

Topic-wise weightage by year

Newest questions (2024)

Sample questions from recent papers

Practise these online, free, no login

Frequently asked

How many questions come from Hydrogen & s-Block Elements in JEE Main?

Which Hydrogen & s-Block Elements topics are most important for JEE Main?

Is the Hydrogen & s-Block Elements PYQ PDF free?

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