Hydrogen and s-Block Compounds Practice Questions
JEE · Chemistry · 1259 free MCQs with instant results and detailed explanations.
1259
Total
245
Easy
562
Medium
452
Hard
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Topics in Hydrogen and s-Block Compounds
Hydrogen Peroxide
243
Heavy Water
247
Hydrides
267
Water
242
Hydrogen
260
Sample Questions from Hydrogen and s-Block Compounds
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary hydrogen isotope present in nature?
A.
Protium
B.
Deuterium
C.
Tritium
D.
Hydride
Show Answer & Explanation
Correct Answer: A
Protium, or hydrogen-1, is the most abundant isotope of hydrogen found in nature, constituting about 99.98% of all hydrogen atoms.
Q2
Easy
Which of the following statements about hydrogen bonding is correct?
A.
Hydrogen bonds are stronger than covalent bonds
B.
Hydrogen bonds can only occur in organic compounds
C.
Hydrogen bonds involve hydrogen atoms bonded to electronegative atoms
D.
Hydrogen bonds are permanent structures
Show Answer & Explanation
Correct Answer: C
Hydrogen bonds form when hydrogen is bonded to highly electronegative elements like oxygen, nitrogen, or fluorine, creating a dipole.
Q3
Easy
What is the molecular formula of water?
A.
H2O
B.
H2O2
C.
HO
D.
H2O3
Show Answer & Explanation
Correct Answer: A
The molecular formula of water is H2O, indicating two hydrogen atoms and one oxygen atom.
Q4
Medium
Which of the following statements is TRUE regarding the properties of hydrogen?
A.
Hydrogen has a higher electronegativity than fluorine.
B.
Hydrogen can form stable compounds only with non-metals.
C.
Hydrogen exists in a diatomic form (H2) at room temperature.
D.
Hydrogen is the least abundant element in the universe.
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Correct Answer: C
Hydrogen primarily exists as H2 in the gaseous state at room temperature, which is a crucial characteristic of its molecular form.
Q5
Medium
Which of the following hydrides is expected to be the most acidic?
A.
NaH
B.
LiH
C.
KH
D.
RbH
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Correct Answer: A
Sodium hydride (NaH) is the most acidic among the given options due to the increasing metallic character and decreasing electronegativity down the group, leading to stronger H− ion release.
Q6
Medium
What is the primary reason for the high electronegativity of hydrogen compared to alkali metals?
A.
Hydrogen has a single electron in its outer shell.
B.
Hydrogen has a smaller atomic size.
C.
Hydrogen can form multiple types of bonds.
D.
Hydrogen is a non-metal.
Show Answer & Explanation
Correct Answer: B
Hydrogen has a smaller atomic size which results in a stronger attraction for electrons compared to alkali metals.
Q7
Medium
Which of the following compounds is not a hydrogen compound?
A.
HCl
B.
CH4
C.
NaH
D.
CaO
Show Answer & Explanation
Correct Answer: D
CaO is calcium oxide, which does not contain hydrogen.
Q8
Hard
Which of the following statements about hydrogen bonding in water is correct?
A.
Hydrogen bonds are formed between water molecules and ionic compounds.
B.
Hydrogen bonds are responsible for the high boiling point of water.
C.
Hydrogen bonds are weak and negligible compared to covalent bonds.
D.
Hydrogen bonds only exist in solid-state water.
Show Answer & Explanation
Correct Answer: B
Hydrogen bonds between water molecules are strong enough to significantly raise the boiling point of water, making it higher than expected based on molecular weight alone.
Q9
Hard
When hydrogen is burned in oxygen, which of the following is the primary product?
A.
Ozone
B.
Hydrogen peroxide
C.
Water
D.
Hydrogen oxide
Show Answer & Explanation
Correct Answer: C
The primary product of burning hydrogen in oxygen is water (H2O), which is formed as hydrogen reacts with oxygen in a combustion reaction.
Q10
Hard
Which of the following compounds is not a stable hydride?
A.
LiH
B.
NaH
C.
MgH2
D.
AlH3
Show Answer & Explanation
Correct Answer: D
AlH3 (aluminum hydride) is not stable under normal conditions and tends to decompose, whereas LiH, NaH, and MgH2 are stable hydrides.
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Hydrogen and s-Block Compounds — JEE Chemistry Practice Questions Online
This page contains 1259 practice MCQs for the chapter Hydrogen and s-Block Compounds in JEE Chemistry. The questions are organized by difficulty — 245 easy, 562 medium, 452 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.