Cambridge IGCSE Chemistry paper 42 May / June 2023 - (0620_s23_qp_42), Solved and Explained.
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Intro: (00:00)
Question1: (00:11)
A list of oxides, A to H, is shown. A calcium oxide B aluminium oxide C silicon(IV) oxide D sulfur dioxide E carbon dioxide F iron(III) oxide G silver oxide H carbon monoxide Answer the following questions about the oxides, A to H. Each letter may be used once, more than once or not at all. State which of the oxides, A to H:
(a) is responsible for acid rain
Question2: (03:10)
Fluorine, chlorine and bromine are in Group VII of the Periodic Table.
(a) State the name given to Group VII elements.
Question3: (09:04)
Over 200 million tonnes of sulfuric acid are manufactured every year.
(a) State the name of the process used to manufacture sulfuric acid.
Question4: (14:27)
Solid sodium hydroxide is a base which dissolves to form an aqueous solution, NaOH(aq).
(a) State what is meant by the term base.
Question5: (20:54)
Propane and propene both react with chlorine.
(a) When a molecule of propane, C3H8, reacts with chlorine in the presence of ultraviolet light, one atom of hydrogen is replaced by one atom of chlorine. (i) State the term given to reactions in which one atom in an alkane is replaced by another atom.
Question6: (24:50)
Carboxylic acids can be converted to esters.
(a) Name the ester formed when butanoic acid, CH3CH2CH2COOH, reacts with ethanol, CH3CH2OH