Hydrogen Practice Questions
NEET · Chemistry · 1465 free MCQs with instant results and detailed explanations.
1465
Total
307
Easy
630
Medium
528
Hard
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Topics in Hydrogen
Hydrides
383
Properties of Hydrogen
366
Water
362
Hydrogen Peroxide
354
Sample Questions from Hydrogen
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary reason hydrogen is considered a unique element among others?
A.
It is the lightest element.
B.
It has no neutrons.
C.
It is a noble gas.
D.
It is the most abundant element in the universe.
Show Answer & Explanation
Correct Answer: A
Hydrogen is the lightest element, with an atomic number of 1, which makes it unique compared to other elements.
Q2
Easy
Hydrogen can form bonds with which of the following types of elements?
A.
Metals only.
B.
Non-metals only.
C.
Both metals and non-metals.
D.
Neither metals nor non-metals.
Show Answer & Explanation
Correct Answer: C
Hydrogen can form covalent bonds with non-metals and metallic bonds with metals, making it versatile.
Q3
Easy
Which of the following statements about hydrogen is true?
A.
Hydrogen is always found as a diatomic molecule.
B.
Hydrogen does not conduct electricity.
C.
Hydrogen is a solid at room temperature.
D.
Hydrogen has a higher density than oxygen.
Show Answer & Explanation
Correct Answer: A
Hydrogen naturally exists as H2, a diatomic molecule, under normal conditions, which is a defining property.
Q4
Medium
Which of the following properties is NOT characteristic of hydrogen?
A.
It can form covalent bonds.
B.
It is a good conductor of electricity.
C.
It exists as a diatomic molecule (H2).
D.
It has the lowest molecular weight.
Show Answer & Explanation
Correct Answer: B
Hydrogen is a poor conductor of electricity at standard conditions because it does not have free electrons like metals do. It can form covalent bonds, exists as a diatomic molecule, and has the lowest molecular weight among all elements.
Q5
Medium
What is the primary reason for the high reactivity of hydrogen?
A.
It has a full outer shell of electrons.
B.
It can easily lose its single electron.
C.
It has a high electronegativity.
D.
It forms stable noble gas configurations.
Show Answer & Explanation
Correct Answer: B
Hydrogen's high reactivity is primarily due to its ability to easily lose its single electron to form a positive ion (H+). This allows it to participate in various chemical reactions.
Q6
Medium
Which of the following compounds is formed when hydrogen reacts with oxygen?
A.
Water (H2O)
B.
Hydrogen peroxide (H2O2)
C.
Ozone (O3)
D.
Hydroxyl radical (OH·)
Show Answer & Explanation
Correct Answer: A
When hydrogen reacts with oxygen in a 2:1 ratio, it forms water (H2O). While hydrogen peroxide can also be formed under certain conditions, the primary and most direct product of this reaction is water.
Q7
Medium
Which of the following statements about hydrogen bonding is correct?
A.
It only occurs in hydrogen fluoride.
B.
It is a strong covalent bond.
C.
It involves hydrogen and highly electronegative atoms.
D.
It results in the formation of ionic compounds.
Show Answer & Explanation
Correct Answer: C
Hydrogen bonding occurs when hydrogen is covalently bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine. It is a type of weak intermolecular force, not a strong covalent bond or an ionic bond.
Q8
Hard
Which of the following statements about hydrogen's bonding capabilities is correct?
A.
Hydrogen can form ionic bonds only.
B.
Hydrogen can participate in both covalent and hydrogen bonding.
C.
Hydrogen does not form bonds with nonmetals.
D.
Hydrogen can only form metallic bonds.
Show Answer & Explanation
Correct Answer: B
Hydrogen can form covalent bonds by sharing electrons with other nonmetals and can also participate in hydrogen bonding due to its partial positive charge when bonded to highly electronegative atoms.
Q9
Hard
What is the enthalpy change when one mole of hydrogen gas is formed from its elements in their standard states?
A.
0 kJ/mol
B.
285.8 kJ/mol
C.
241.8 kJ/mol
D.
−286 kJ/mol
Show Answer & Explanation
Correct Answer: A
The formation of hydrogen gas from its elements (H2 from H and H) has an enthalpy change of 0 kJ/mol because it is the standard state of the elemental form.
Q10
Hard
Which property of hydrogen explains its ability to act as a reducing agent?
A.
Low electronegativity
B.
Small atomic size
C.
High ionization energy
D.
High standard enthalpy of formation
Show Answer & Explanation
Correct Answer: B
Hydrogen's small atomic size allows it to donate its electron easily, making it a good reducing agent in various chemical reactions.
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Hydrogen — NEET Chemistry Practice Questions Online
This page contains 1465 practice MCQs for the chapter Hydrogen in NEET Chemistry. The questions are organized by difficulty — 307 easy, 630 medium, 528 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 4 topics, giving you comprehensive coverage of the entire chapter.