IGCSE Chemistry pastpaper 0620/41/o/n/21

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In this video we will solve and explain Cambridge IGCSE chemistry paper 41 October/November 2021.

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Intro: (00:00)
Question1: (00:13)
Some elements are shown in the order they appear in the reactivity series. The most reactive
element is at the top.
sodium
calcium
magnesium
aluminium
zinc
iron
hydrogen
copper
(a) Answer the questions using the list of elements. Each element may be used once, more than
once or not at all.
Identify:
(i) a non-metal

Question2: (03:35)
This question is about copper and its compounds.
(a) Copper has two different naturally occurring atoms, 63Cu and 65Cu.
(i) State the term used for atoms of the same element with different nucleon numbers.

Question3: (10:16)
This question is about electrolysis.
Concentrated hydrochloric acid is electrolysed using the apparatus shown.
(a) Chloride ions are discharged at the anode.
(i) Complete the ionic half-equation for this reaction.

Question4: (13:40)
Chalcopyrite, FeCuS2, is used in the manufacture of sulfuric acid in the Contact process.
(a) In the first stage of the process, chalcopyrite reacts with oxygen in the air to produce
sulfur dioxide, SO2, iron(III) oxide and copper(II) oxide.
Complete the chemical equation for the reaction of FeCuS2 with oxygen

Question5: (16:05)
Alkenes and carboxylic acids are both families of similar compounds with similar chemical properties.
Alkenes and carboxylic acids have different reactions.
(a) State the term used for a ‘family’ of similar compounds.

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