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NDA Chemistry in Everyday Life questions with solutions

Everyday and industrial chemicals, soaps and water. 16 questions from our 2017–2025 NDA pattern papers, from the Class 12 Chemistry syllabus. Each has the answer and a full solution.

NDA 2025

In the electrolysis of brine (concentrated sodium chloride solution), the gas liberated at the anode isNDA 2025 GAT · medium
On heating, sodium hydrogen carbonate (baking soda) decomposes to giveNDA 2025 GAT · hard
Permanent hardness of water cannot be removed by boiling. 2. Washing soda (sodium carbonate) can remove both temporary and permanent hardness.NDA 2025 GAT · hard

NDA 2024

Plaster of Paris is obtained by heating gypsum at 373 K. Its chemical formula isNDA 2024 GAT · medium
Cleaning agents: 1. Soaps are effective in hard water. 2. Synthetic detergents do not form insoluble scum with hard water.NDA 2024 GAT · medium

NDA 2023

The chemical formula of slaked lime isNDA 2023 GAT · hard
Magnetic resonance imaging (MRI) used in medical diagnosis is based on the principle ofNDA 2023 GAT · medium

NDA 2021

Which gas is commonly used in fire extinguishers?NDA 2021 GAT · easy
Permanent hardness of water can be removed by addingNDA 2021 GAT · medium

NDA 2020

The chemical formula of baking soda isNDA 2020 GAT · easy
Plaster of Paris has the formula CaSO4.1/2H2O. 2. Gypsum, when heated to about 373 K, gives Plaster of Paris.NDA 2020 GAT · medium
Hardness of water. 1. Temporary hardness is caused by the bicarbonates of calcium and magnesium. 2. Permanent hardness can be removed simply by…NDA 2020 GAT · medium

NDA 2019

Plaster of Paris has the formula CaSO4.1/2 H2O. 2. It is obtained by heating gypsum at about 373 K.NDA 2019 GAT · medium
Temporary hardness of water is caused by chlorides of calcium and magnesium. 2. Soap produces lather easily with hard water.NDA 2019 GAT · medium

NDA 2018

The chemical formula of washing soda isNDA 2018 GAT · easy

NDA 2017

The chemical formula of quicklime isNDA 2017 GAT · easy

Other General Knowledge topics

Current Affairs 37 Indian Economy 36 Constitution and Fundamental Rights 46 Parliament, Executive and Judiciary 23 Ancient India 36 Medieval India 28 Freedom Struggle 50 Modern India and British Rule 41 World Geography 29 Indian Geography 81 Physical Geography 31 Units and Measurements 11 Motion, Forces and Gravitation 40 Work, Energy and Power 7 Fluids and Pressure 10 Heat and Thermal Physics 8 Sound and Waves 16 Light and Optics 37 Current Electricity 20 Magnetism and Electromagnetic Induction 17 Nuclear and Modern Physics 9 Atomic Structure, Periodic Table and Bonding 31 Acids, Bases and Salts 13 Metals, Alloys and Corrosion 20 Carbon and Organic Chemistry 22 Chemical Reactions 12 Mole Concept and States of Matter 13 Cell Biology and Classification 18 Genetics and Heredity 13 Plant Physiology 21 Nutrition, Diseases and Health 28 Human Physiology 62 Ecology and Environment 24