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Chemistry · Oct / Nov 2025 · Paper 61 · Question 1

0620

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The question as text

Hot concentrated hydrochloric acid reacts with solid manganese(IV) oxide to make chlorine gas. Chlorine gas is toxic and more dense than air. Concentrated hydrochloric acid is corrosive. Fig. 1.1 shows the apparatus used to make and collect a sample of chlorine gas. There is one error in the way the apparatus has been set up in Fig. 1.1. X HEAT Y Fig. 1.1

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  • 1(a)[1]

    (conical) flask

  • 1(b)[1]

    (concentrated) hydrochloric acid

  • 1(c)[1]

    Bunsen (burner)

  • 1(d)[1]

    any one from:

    collection tube needs to be the other way up
    use downward delivery
    use upward displacement of air
    collect chlorine in a gas syringe

  • 1(e)[1]

    chlorine is toxic

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