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NDA Chemical Reactions and Equations — practice questions

Explore 10 free Chemical Reactions and Equations questions in NDA Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Chemical Reactions and Equations questions and exercises with answers

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CLASS10 · Chemistry · Carbon Compounds — Functional GroupRead the answer and worked solution →When a single reactant breaks down into two or more products, the reaction is called:Read the answer and worked solution →Rusting of iron is an example of:Read the answer and worked solution →An exothermic reaction is one in which heat is:Read the answer and worked solution →Zn + CuSO₄ → ZnSO₄ + Cu is an example of:Read the answer and worked solution →The chemical formula of slaked lime is:Read the answer and worked solution →The reaction AgNO₃ + NaCl → AgCl + NaNO₃ is best classified as:Read the answer and worked solution →The substance which gets oxidised in the reaction CuO + H₂ → Cu + H₂O is:Read the answer and worked solution →Galvanisation, the coating of iron with a thin layer of another metal to prevent rusting, uses:Read the answer and worked solution →Quicklime (CaO) reacts vigorously with water to form slaked lime. This reaction is:Read the answer and worked solution →

Worked practice questions

CLASS10 · Chemistry · Carbon Compounds — Functional Group

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Matching pairs
  1. A
    Alcohol
    B
    −OH (hydroxyl)
  2. A
    Aldehyde
    B
    −CHO
  3. A
    Ketone
    B
    >C=O
  4. A
    Carboxylic acid
    B
    −COOH
  5. A
    Ether
    B
    −O−
  6. A
    Amine
    B
    −NH₂
Instructions
Match each functional group to its name.

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When a single reactant breaks down into two or more products, the reaction is called:

  1. Decomposition reaction
  2. Combination reaction
  3. Displacement reaction
  4. Neutralisation reaction
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Correct answer: A. Decomposition reaction

1. AB → A + B is the general form. 2. CaCO₃ →(heat) CaO + CO₂ is a thermal decomposition. 3. Electrolysis of water and photodecomposition of AgCl are other examples. _Source: syllabus Science Ch 1 §1.2.2 Decomposition Reactions_

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Rusting of iron is an example of:

  1. Oxidation
  2. Reduction
  3. Neutralisation
  4. Esterification
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Correct answer: A. Oxidation

1. Fe + O₂ + H₂O → Fe₂O₃·xH₂O (rust). 2. Iron gains oxygen (and loses electrons) — OXIDATION. 3. Rust is hydrated iron(III) oxide. _Source: syllabus Science Ch 1 §1.4 Corrosion and Rusting_

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More Chemistry topics

Carbon and its CompoundsUnit 6A1: Heat Transfer and CalorimetryElements, Compounds and MixturesUnit 8A: Acid-Base Properties & EquilibriaMetallurgyUnit 1B1: Atomic Structure & Quantum MechanicsUnit 1C1: Periodic Trends in Atomic PropertiesUnit 4B1: Properties of Metals and Non-Metals