IGCSE CHEMISTRY SOLVED past paper 0620/43/O/N/22 - October / November 2022 Paper 43

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This video solves and explains Cambridge IGCSE Chemistry paper 43 October / November 2022.

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Intro: (00:00)
Question1: (00:10)
Atoms and ions are made from small particles called electrons, neutrons and protons. (a) Complete the table.

Question2: (02:08)
The table shows the melting points, boiling points and electrical conductivities of six substances, D, E, F, G, H and I.

Question3: (05:21)
Aluminium is extracted from its ore by electrolysis. (a) Name the ore of aluminium which consists mainly of aluminium oxide.

Question4: (10:17)
This question is about compounds of phosphorus. (a) Gaseous phosphorus(V) chloride decomposes into gaseous phosphorus(III) chloride and gaseous chlorine. When the three gases are present in a closed container the system reaches equilibrium. PCl 5(g) PCl 3(g) + Cl 2(g) (i) Complete the table using only the words increases, decreases or no change.

Question5: (16:19)
This question is about sulfuric acid, H2SO4, and salts that can be made from sulfuric acid. (a) Sulfuric acid is manufactured by the Contact process. stage 1 Molten sulfur burns in air to produce sulfur dioxide. stage 2 Sulfur dioxide reacts with oxygen to form sulfur trioxide, SO3. stage 3 Sulfur trioxide reacts with concentrated sulfuric acid to form oleum, H2S2O7. stage 4 Oleum is converted into sulfuric acid. (i) The equation for the reaction in stage 2 is shown. 2SO2 + O2 2SO3 State the temperature and pressure used in stage 2. Name the catalyst used in stage 2.

Question6: (23:47)
(a) Chloroethene (CH2=CHCl) can be manufactured from 1,2-dichloroethane (CH2ClCH2Cl). The equation can be represented as shown.

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[a.meforyou]

Thank yoh so much . Have an exam soon and this helped.

[aaaa-riis]

how to know BaSO4 is white and CuSo4 is blue? do i just memorise?
i find alot of questions talking about the color of compounds and im pretty confused because ive never learnt about the colors. Is there specific compounds or elements that i have to memorise their color?

[judymokhtar]

in 2c why we said that macromolecule doesnt conduct electricity although graphite is macro molecule and conduct

[imannoying]

asalam o alikum. Can u please tell me why, in question 6 b.ii the answer is but1ene and not just butene

[dawa_kalimatullah]

why not counting from left in q6, but 1 ene
why is it not but 3 ene ?