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Class 10 Chemistry Chapter 15: Environmental Chemistry II: Water MCQs With Explanations

Practice Class 10 Chemistry Chapter 15: Environmental Chemistry II: Water MCQs with explanations for Pakistani board exams. Includes solved objective questions, answer checking, chapter revision guidance and next chapter suggestions.

MCQs / Class 10 / Chemistry / Chapter 15: Environmental Chemistry II: Water
11 MCQs

Chapter 15: Environmental Chemistry II: Water Objective Preparation

Use this page for direct chapter practice, answer checking and explanation review. It is available through the clean URL shown in the browser, so students can bookmark and share this exact chapter.

11Total MCQs
11With explanations
6Topics represented

Topics found: Water Treatment, Properties of Water, Hardness of Water, Water Related Diseases, Water Pollution, Solubility

Environmental Chemistry II: Water MCQs With Explanations

Q1. Swimming pools are cleaned by a process:
Chlorination is the standard method for disinfecting swimming pools, using chlorine to kill pathogens and prevent waterborne diseases.
Q2. Specific heat capacity of water is:
The specific heat capacity of water is 4.184 J g⁻¹ K⁻¹, commonly rounded to 4.2 J g⁻¹ K⁻¹; the other options have incorrect units or values.
Q3. The density of water at 4°C is:
Water reaches its maximum density of 1 g/cm³ at 4°C, a key physical property critical for aquatic ecosystem stability.
Q4. Which one of the following ion does not cause hardness in water?
Sodium ions (Na⁺) do not contribute to water hardness, which is caused by Ca²⁺ and Mg²⁺, even when paired with anions like sulfate.
Q5. Which one of the following properties of water is responsible for rising of water in Plants?
Capillary action, driven by adhesion and cohesion, enables water to rise through xylem vessels in plants against gravity.
Q6. Which of the following diseases is characterized by liver inflammation?
Hepatitis is a viral or inflammatory condition that directly causes liver inflammation; jaundice is a symptom, not a disease.
Q7. Depletion of dissolved oxygen in water is NOT directly caused by:
Rapid growth of aquatic plants increases oxygen production via photosynthesis; oxygen depletion occurs later during decay, not during growth.
Q8. Rapid growth of algae in water bodies is because of detergent having:
Phosphate salts in detergents act as nutrients that promote eutrophication, leading to rapid algal growth in water bodies.
Q9. Water dissolves polar non-ionic compounds primarily through:
Hydrogen bonding is the dominant intermolecular force by which water dissolves polar non-ionic compounds like sugars and alcohols, due to water's ability to form H-bonds with electronegative atoms.
Q10. Which of the following gas is used to destroy harmful bacteria in water:
Chlorine gas is widely used in water treatment to disinfect and kill harmful bacteria and pathogens.
Q11. A disease that causes bone and teeth damage is:
Fluorosis results from excessive fluoride intake and causes discoloration and weakening of bones and teeth.

After Chapter 15: Environmental Chemistry II: Water, Practice Next Chapters

Once you finish these MCQs, continue with the next available chapters from Chemistry so your revision stays chapter-wise and complete.

Chapter 15: Environmental Chemistry II: Water Revision Guide

Complete the MCQs first, then review every incorrect answer against the textbook heading where that concept appears. For biology and other science subjects, pay attention to terminology, diagrams, sequence of processes, examples and differences between similar structures or functions.

This chapter page keeps the exact class, subject, chapter, question count, answer checking, explanations and follow-up chapters together, so students can revise from one focused URL instead of searching through the full book again.

Class 10 Chemistry MCQ Preparation: Environmental Chemistry II: Water

This page supports Matric Part 2 practice in Chemistry. At this stage, the main purpose is strengthening final-year matric concepts and preparing for cumulative school and board assessments. The questions available here should be used with the current textbook and the instructions issued by the learner's school or examination board.

What Chemistry MCQs can test

In Chemistry, objective questions commonly draw on chemical symbols, atomic structure, periodic trends, bonding, equations, reaction conditions, laboratory observations and calculations. A useful answer is based on the exact wording and concept, not simply on recognising a familiar option. For this subject, learners should connect each chemical fact with a particle-level explanation and check symbols, charges, valencies and equation balance carefully.

Environmental Chemistry II: Water: focused MCQ revision

This chapter should be reviewed through its main definitions, examples, diagrams, comparisons and links with earlier Chemistry concepts.

Write a one-sentence reason for each corrected answer and note the textbook heading where the concept is explained.

Common mistakes for Class 10 learners

In this subject, frequent errors include confusing related trends, using an incorrect chemical symbol, missing a reaction condition or treating similar compounds as identical. Review textbook exceptions, diagrams, units and similar-looking statements because these often cause avoidable objective-question errors. When the page marks an answer as incorrect, the next step should be to identify the mistaken idea and verify it, rather than memorising the displayed answer letter.

A practical revision routine

Alternate chapter revision with short mixed tests so that older material remains active while new chapters are completed. Before attempting the MCQs, review definitions, equations, periodic relationships, structures, reaction conditions, examples and exceptions stated in the textbook. Complete a manageable set without notes, check the result, and divide errors into missing knowledge, misunderstood concepts and careless reading. Revise the appropriate section before repeating the chapter.

How to review Environmental Chemistry II: Water after the quiz

List the questions you missed from Environmental Chemistry II: Water and write the textbook heading connected with each one. Explain the correct idea in your own words, then return later and answer a fresh set. This gives the chapter page a clear purpose: finding specific weaknesses in Chemistry rather than only collecting a score.

Accuracy and responsible use

Explanations are provided where they exist in the question bank, but educational databases can contain incomplete or mistaken material. Confirm disputed answers with an authoritative textbook or teacher. Ahmad Learning Hub provides a practice resource and does not claim that a question will appear in an examination or that every available item represents an official board question.