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  - Materials Chemistry
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    - Composites 8
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- Biology
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  - Botany Plant Biology
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    - Photosynthesis 53
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    - Porifera 6
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    - Platyhelminthes 5
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    - Arthropoda 12
    - Mollusca 5
    - Echinodermata 6
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    - Fish 76
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    - Birds 5
    - Mammals 106
    - Anatomy 36
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    - Development 6
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    - Bacteriology 33
    - Virology 34
    - Mycology 16
    - Parasitology 59
    - Microbial Genetics 5
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    - Bio Nucleic Acids 5
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Exams & Certifications

Chemistry Quizzes, Questions & Answers

Recent Chemistry Quizzes

This assessment focuses on fundamental chemistry laws and concepts, including the Law of Conservation of Mass and Avogadro's Hypothesis. It evaluates your understanding of how mass and composition are maintained in chemical...

Questions: 30 | Attempts: 17 | Last updated: Jun 24, 2026

Sample Question
What does the Law of Conservation of Mass state?

Mass is created during a chemical reaction

In a chemical change, total mass remains conserved

Mass is destroyed after a chemical reaction

Mass changes depending on temperature

Chemical Nomenclature and Compound Types

This assessment covers key concepts in chemical nomenclature, including naming binary and multivalent ionic compounds, polyatomic ions, and molecular compounds. Understanding these naming conventions is essential for students...

Questions: 10 | Attempts: 14 | Last updated: Jun 24, 2026

Sample Question
What suffix is used when naming a binary ionic compound?

-ate

-ide

-ite

-ous

Stoichiometry Core Concepts

This assessment focuses on stoichiometry, evaluating your understanding of key concepts such as moles, mass-to-mass calculations, and limiting reagents. By testing your knowledge of balanced equations and yield calculations, you...

Questions: 20 | Attempts: 14 | Last updated: Jun 17, 2026

Sample Question
What is stoichiometry used for?

Using balanced equations to calculate amounts of substances in reactions

Measuring the temperature of chemical reactions

Identifying the color of chemical compounds

Determining the speed of chemical reactions

Atomic Structure and Periodic Trends

This assessment focuses on atomic structure and periodic trends, evaluating your understanding of elements, isotopes, and ionization energy. It covers key concepts such as the number of protons, neutrons, and electrons in various...

Questions: 8 | Attempts: 11 | Last updated: Jun 17, 2026

Sample Question
Complete the table for Sulfur (S): How many protons, electrons, and neutrons does a neutral sulfur atom have, and what type of element is it?

Protons: 16, Electrons: 16, Neutrons: 16, Type: Non-metal

Protons: 16, Electrons: 16, Neutrons: 16, Type: Metal

Protons: 16, Electrons: 18, Neutrons: 16, Type: Non-metal

Protons: 32, Electrons: 32, Neutrons: 16, Type: Metalloid

Atomic Structure & Matter Chemistry

This assessment focuses on atomic structure and matter in chemistry, evaluating concepts such as mixtures, chemical changes, and the periodic table. It helps learners understand key principles like electron configuration,...

Questions: 30 | Attempts: 11 | Last updated: Jun 17, 2026

Sample Question
Which of the following correctly classifies salt water (NaCl dissolved in H₂O)?

Pure substance – compound

Homogeneous mixture – solution

Heterogeneous mixture

Pure substance – element

Chemistry Comprehensive Review

This assessment focuses on key concepts in chemistry, including atomic structure, chemical reactions, and periodic trends. It evaluates your understanding of fundamental principles like isotopes, stoichiometry, and acid-base...

Questions: 10 | Attempts: 10 | Last updated: Jun 17, 2026

Sample Question
Which scientist is credited with discovering the neutron?

Dalton

Moseley

Chadwick

Curie

Atomic Structure, Bonding and Chemical Tests

This assessment focuses on atomic structure, bonding, and chemical tests. It evaluates your understanding of subatomic particles, isotopes, reactivity trends, and acid-base properties. By completing this assessment, learners can...

Questions: 11 | Attempts: 13 | Last updated: Jun 17, 2026

Sample Question
Which subatomic particle has a negligible mass and a charge of -1?

Proton

Neutron

Electron

Nucleus

Understanding Polymers and Their Applications

This assessment focuses on understanding polymers and their applications. Key concepts include types of polymers, polymerization, and characteristics of thermoplastics and thermosetting plastics. It's relevant for learners...

Questions: 11 | Attempts: 32 | Last updated: May 22, 2026

Sample Question
What is the first man-made plastic created in 1862?

Bakelite

Celluloid

Nylon

Rayon

Understanding Mixtures, Compounds, and Chemical Changes

This assessment explores the fundamental concepts of mixtures, compounds, and chemical changes. It evaluates your understanding of key topics such as the differences between heterogeneous and homogeneous mixtures, the nature of...

Questions: 19 | Attempts: 11 | Last updated: May 18, 2026

Sample Question
What is a heterogeneous mixture?

A uniform mixture of substances

Multiple substances mixed unevenly

A single type of atom

A chemical compound

Understanding Acids and Alkalis for Year 8 Students

This assessment focuses on understanding acids and alkalis, including indicators, pH scale, and the effects of acid rain. It evaluates key concepts such as the properties of acids, neutralization processes, and the role of...

Questions: 8 | Attempts: 12 | Last updated: May 18, 2026

Sample Question
What is an indicator?

A substance that changes color in acid or alkaline solutions

A type of acid

A type of alkali

A chemical that does not react with acids or alkalis

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