Relevant Titles
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CBSE Class 11 Chemistry MCQs on Hydrogen and Water Relationship
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NCERT-Based Quiz on Hydrogen and Water for Class 11 Chemistry
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Important MCQs on Water and Hydrogen Relationship – CBSE Class 11
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CBSE Inorganic Chemistry Chapter 9: Hydrogen Practice Questions
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Class 11 Chemistry Online Test – Hydrogen and Water Concept MCQs
Introduction Paragraph
Hydrogen and Water Relationship is one of the most fundamental topics discussed in Chapter 9: Hydrogen under Part B: Inorganic Chemistry of the CBSE Class 11 Chemistry syllabus. This topic explores the vital connection between hydrogen and water, covering aspects such as hydrogen bonding, water formation, properties of water, and its autoionization. Understanding these relationships helps students grasp key chemical principles like acid-base behavior, oxidation-reduction reactions, and the role of water as a universal solvent.
This CBSE Class 11 Chemistry Online Practice Test is based strictly on the NCERT syllabus and includes well-structured multiple-choice questions with automatic scoring and instant feedback. These MCQs help students test conceptual clarity while strengthening their foundation for board exams, JEE, and NEET.
Through consistent practice, students can better understand how hydrogen interacts with water in different physical and chemical processes—an essential concept in both theoretical and applied chemistry.
Sample MCQs (with Answers and Explanations):
Q1. Which reaction produces water as a product?
A) Combustion of hydrogen B) Electrolysis of water C) Reaction of Na with water D) None
Answer: A
Explanation: The combustion of hydrogen in oxygen forms water: 2H₂ + O₂ → 2H₂O, an exothermic reaction.
Q2. What is the concentration of H⁺ ions in pure water at 25°C?
A) 1 × 10⁻⁷ M B) 1 × 10⁻³ M C) 1 M D) 0
Answer: A
Explanation: Pure water autoionizes slightly, producing equal concentrations of H⁺ and OH⁻, both being 1 × 10⁻⁷ M.
Q3. Which ion represents a hydrated proton in water?
A) H⁺ B) H₃O⁺ C) H₂ D) OH⁻
Answer: B
Explanation: In aqueous solutions, H⁺ exists as H₃O⁺ (hydronium ion), showing hydrogen’s interaction with water molecules.
Q4. Which property of water is due to hydrogen bonding?
A) High boiling point B) Low density C) Non-polarity D) Poor solubility
Answer: A
Explanation: Hydrogen bonding between water molecules increases intermolecular attraction, leading to a higher boiling point.
Q5. Which statement correctly explains water’s amphoteric nature?
A) Water acts only as an acid B) Water acts only as a base C) Water can act as both acid and base D) Water is neutral
Answer: C
Explanation: Water can donate or accept protons, behaving as both acid and base—showing amphoteric character.