IGCSE Chemistry Oct/Nov 2021 Paper 41 Model Answer + Explanation - 0620/41/O/N/21

[@MHIgamingTV786]

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[@MrKhing]

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[@mattg9171]

Best explanation ever! Thank you so much sir❤❤

[@Angelina-z3y5m]

Hello, for q2 cii, you didnt use the sodium or sulfur in the reaction. What was the reason for that?

[@janaosama1562]

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[@MrKhing]

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[@chickendestroyer7937]

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[@sultanahmadcheema1766]

Does equilibrium shifts to the right hand side when temperature increases?

[@jjspants]

When temp increases it always favors the side of endo, in this case they've stated that forward reaction is exo, so it'll shift to the left hand side favoring the backward reaction as it's endo

[@ayeshabaloch2493]

hello sir i wanted to ask few doubts, for Q1 e iv) can i get marks if i write powdered zinc? and for Q2 ci) can i get marks if i write light blue precipitate ?

[@MrKhing]

Yes, both are acceptable. well done 🤙

[@ayeshabaloch2493]

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[@otakugolv4187]

I don’t understand why water is a product in question 4 (c)?? Isn’t dehydration removal of water??

[@MrKhing]

Yes dehydration is removal of water. Water is removed from the reactants, therefore water is on the product part.

[@otakugolv4187]

@@MrKhing oh!! Ok thanks 😅

[@jasonytyt]

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[@sarah-uu2lw]

Hi sir in question 1a iv isnt copper also a transition metal? Also, in q 1c can i write “ aluminum has impurities “

[@timoxk]

yes it is a transition metal. if you look at the mark scheme it only have protective oxide layer as a correct answer so you can't say “aluminum has impurities“

[@khadijayousaf2139]

@@timoxk If it's a transition element, then how does iron become the answer for 1-a)vi). Also i think zinc is a transition element too, so why is the answer iron 🤒

[@Stonero.x7]

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[@johnmohandoss9927]

I'm Mr Khing

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[@MrKhing]

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[@mohammedalkhaldio3303]

33:40 💀