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

[@a.meforyou]

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

[@Zleexo]

thank you, this is very helpful!

[@TechTrends-vx2dk]

I love your videos

[@aaaa-ri8is]

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?

[@vencci]

yes in chemistry we hv to memorise the colours, u can search in ur textbook (usually the last chapter) or search online :)

[@judymokhtar]

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

[@mizukimidnight9387]

Macromolecular structure usually don’t conduct because they are made from non metals, graphite is the main exception that we need to remember because it has free electrons in its structure the others don’t.

[@dawa_kalimatullah]

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

[@DrMonaSeif]

The role of naming organic compound is to give the function group the lowest number possible

[@imannoying9749]

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

[@DrMonaSeif]

You have to determine the position of the function group or of the branch. The position of the double bond in butene is on carbon number one so we have to write butl -1- ene

[@imannoying9749]

@@DrMonaSeif alright. jazakallah khair