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Previous year question hub

Environmental Chemistry - Environmental Science & Engineering Previous Year Questions

Practice Environmental Chemistry - Environmental Science & Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

6Papers
6Years
28Questions
1Topics

Environmental Chemistry question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Environmental Chemistry. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 17 60.7%
Medium 11 39.3%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Numerical Answer Type (NAT) 13 46.4%
MCQ 10 35.7%
MSQ 5 17.9%

Subject weightage

Top subjects by unique question coverage.

Environmental Science & Engineering
28 Qs

Most asked topics

Top topics across the included previous year papers.

Environmental Chemistry
28 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Principles of Water Chemistry
13 Qs
Fundamentals of Environmental Chemistry
12 Qs
Soil Chemistry
2 Qs
Atmospheric Chemistry
1 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Environmental Science & Engineering (ES) 2026
3 Qs
Environmental Science & Engineering (ES) 2025
6 Qs
Environmental Science & Engineering (ES) 2024
7 Qs
Environmental Science & Engineering (ES) 2023
3 Qs
Environmental Science & Engineering (ES) 2022
5 Qs
Environmental Science & Engineering (ES) 2021
4 Qs

Browse by subtopics

Open a focused page built from the same verified paper data.

Principles of Water Chemistry

Explore previous-paper coverage, trends and focused practice for Principles of Water Chemistry.

13 questions6 papers6 years

Fundamentals of Environmental Chemistry

Explore previous-paper coverage, trends and focused practice for Fundamentals of Environmental Chemistry.

12 questions6 papers6 years

Soil Chemistry

Explore previous-paper coverage, trends and focused practice for Soil Chemistry.

2 questions2 papers2 years

Atmospheric Chemistry

Explore previous-paper coverage, trends and focused practice for Atmospheric Chemistry.

1 questions1 papers1 years

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
Environmental Science & Engineering (ES) 202620263View paper
Environmental Science & Engineering (ES) 202520256View paper
Environmental Science & Engineering (ES) 202420247View paper
Environmental Science & Engineering (ES) 202320233View paper
Environmental Science & Engineering (ES) 202220225View paper
Environmental Science & Engineering (ES) 202120214View paper

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

1
2024 · Environmental Science & Engineering · Environmental Chemistry · Fundamentals of Environmental Chemistry
Environmental Science & Engineering (ES) 2024
The maximum coordination number of Sr^{2+} is _____.
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2
2025 · Environmental Science & Engineering · Environmental Chemistry · Fundamentals of Environmental Chemistry
Environmental Science & Engineering (ES) 2025

Choose the redox reaction from the following

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3
2021 · Environmental Science & Engineering · Environmental Chemistry · Fundamentals of Environmental Chemistry
Environmental Science & Engineering (ES) 2021
The oxidation states of ‘N’ in NH₄⁺, NO₂⁻, and NO are __________, respectively.
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4
2022 · Environmental Science & Engineering · Environmental Chemistry · Fundamentals of Environmental Chemistry
Environmental Science & Engineering (ES) 2022

If G represents Gibbs free energy, select the correct statement(s)

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5
2023 · Environmental Science & Engineering · Environmental Chemistry · Fundamentals of Environmental Chemistry
Environmental Science & Engineering (ES) 2023
Match the following
J) Dalton's law             i) Diffusion
K) Fick's law                ii) Pressure exerted by a mixture of gases
L) Henry's law             iii) Gravitational settling
M) Stoke's law             iv) Gas-liquid phase transfer
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6
2026 · Environmental Science & Engineering · Environmental Chemistry · Fundamentals of Environmental Chemistry
Environmental Science & Engineering (ES) 2026
In the reversible reaction shown below, \(k_f\) is the forward reaction rate constant and \(k_r\) is the reverse reaction rate constant.
The CORRECT expression representing the reaction equilibrium constant is ____.\[A + B \overset{k_f}{\underset{k_r}{\rightleftharpoons}} C + D\]
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