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1. Suggest why a small amount of dilute acid is added to water before it is electrolysed

Question 1 of 10

2. During condensation polymerisation, what else forms other than the polymer?

Question 2 of 10

3. Calculate the relative formula mass(Mr) of aluminium oxide (Al₂O₃)

Question 3 of 10

4. State the particles that are found within the nucleus of an atom

Question 4 of 10

5. State the expression for calculating molar volume of a gas.

Question 5 of 10

6. In a flame test, why is hydrochloric acid used?

Question 6 of 10

7. Hydrogen and helium have both been used in balloons. State one advantage of using helium instead of hydrogen

Question 7 of 10

8. The chemical equations for the two reactions that occur during the extraction of aluminium are A: Al³⁺ + 3e¯ → Al and B: C + O₂ → CO₂. State and explain which species in the reactions are oxidised or reduced

Question 8 of 10

9. Balance the following equation: WO₃ + H₂ → W + H₂O

Question 9 of 10

10. Write the word equation to represent the reaction between sulfuric acid and magnesium

Question 10 of 10


2022-03-09T21:22:06+00:00Categories: Uncategorized|Tags: |
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Section 1: Principles of chemistry

      a) States of matter

      b) Atoms

      c) Atomic structure

     d) Relative formula masses and molar volumes of gases

     e) Chemical formulae and chemical equations

     f) Ionic compounds

     g) Covalent substances

     h) Metallic crystals

     i) Electrolysis

 Section 2: Chemistry of the elements

     a) The Periodic Table

     b) Group 1 elements: lithium, sodium and potassium

     c) Group 7 elements: chlorine, bromine and iodine

     d) Oxygen and oxides

     e) Hydrogen and water

     f) Reactivity series

     g) Tests for ions and gases

Section 3: Organic chemistry

     a) Introduction

     b) Alkanes

     c) Alkenes

     d) Ethanol

Section 4: Physical chemistry

     a) Acids, alkalis and salts

     b) Energetics

     c) Rates of reaction

     d) Equilibria

Section 5: Chemistry in industry

     a) Extraction and uses of metals

     b) Crude oil

     c) Synthetic polymers

     d) The industrial manufacture of chemicals

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