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Daily Practice

GCSE Science

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23rd January 1969

5 questions · GCSE · 584 questions in this band

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  1. 1
    Moles, Formulae and Equations

    Calculate the number of moles in 88 g of carbon dioxide. (Mr = 44)

  2. 2
    Concentration, Yield and Atom Economy

    State two reasons why a percentage yield is less than 100 percent.

  3. 3
    Chemical Changes

    State the pH value of a neutral solution.

  4. 4
    Reactivity, Acids and Salts

    Complete: acid + metal carbonate gives ...

  5. 5
    Electrolysis

    State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.

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