IGCSE CHEMISTRY SOLVED past paper 0620/21/O/N/22 - October / November 2022 Paper 21

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Dr. Mona Seif

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Пікірлер: 18

@likhungundlo9097 Жыл бұрын

Thank you so much i am revising for my 2023 exams hope this will make me pass

@user-gt1we8xo9f Жыл бұрын

good luck

@muhammadmaaz1152 Жыл бұрын

Thank you so much miss, really helpful JazakAllah Khairun

@user-su4fx5vb5z 11 ай бұрын

god bless u for making these helpful videos

@Shadow-eq8uo Жыл бұрын

I was looking for this paper's explanation everywhere🧐🧐 thank u so so so so veryyyyyyy much 😁😁😁

@user-gt1we8xo9f Жыл бұрын

thx for the explanation but i am confused on question 9.where did v/24 came from

@DrMonaSeif Жыл бұрын

Number of moles of agas= volume/ 24

@nyleakhaireenreen4075 Жыл бұрын

@@DrMonaSeif how did you get 24 ??

@HamadBOLTE 4 ай бұрын

@@nyleakhaireenreen4075 1 Mole Of Any Gas At Room Temperature Have 24 Dm3.

@ms.psychospectrum23 3 ай бұрын

@@nyleakhaireenreen4075 cuz the gas is at room temperature

@herox78816 Жыл бұрын

in q10 y do the electrons move from positive terminal to negative?isnt it opposite?

@DrMonaSeif Жыл бұрын

Electrons move from the battery to the cathode, these electrons are gain by positive ions in the solution . Then anode ionise releasing electrons which move through the wire to the outer circuit .(as shown in this question )

@jendamnit 2 ай бұрын

In question 20, please explain why carbon monoxide is of course neutral...I think to be a great teacher, it is significant to explain even though it is obvious for some students who might have difficulties to comprehend. So please don't say the phrase 'of course' and explain..........

@DrMonaSeif 2 ай бұрын

The oxides that react with water to form acid or oxides that react with a base to form a salt are known as acidic oxides. The oxides that react with water to form a base or oxides that react with an acid to form a salt are known as basic oxides. The oxides which neither react with acids nor react with bases are known as neutral oxides. The oxides which react with acids as well as react with bases to form a salt are known as amphoteric oxides. Carbon monoxide neither reacts with acids nor reacts with bases. Thus, carbon monoxide is a neutral oxide.

@tyracarimo8203 Жыл бұрын

where can i get the oct/nov 2022 paper ?

@dinas1623 5 ай бұрын

From the internet Just search oct nov 2022 0620(the subject code of the subject u want in this case it is chemistry) and then the component code like 21,22,23,41,61 etc and many websites will come you can click on any