Biology; Chemistry; Physics: Post your doubts here!

[zohamania]

 

[ptet.chemistry]

Hello fellow students, if you or someone else you know are preparing for O-Level or A-Level chemistry this October/November 2020, or sometime in the future, please check out my YouTube channel where I feature step-by-step tutorial videos on my thought processes in addressing the examination papers across the different variants of the Cambridge International curriculum.

ptet chemistry

I am Mr Onn, a chemist and a teacher. I graduated from University of Oxford, with a first class honours in Master of Chemistry (MChem), funded by the Brunei ...

www.youtube.com

Even if your zone(s) is/are set to sit for a specific variant, it never hurts to check out the same curriculum in other variants for practice. Please subscribe to the channel to support this not-for-profit endeavour. Also, please spread the words to your friends/teachers/contacts to benefit more students like yourself.

More contents will come in the future in terms of topic conceptual developments but my focus for now is to prepare students for public examinations.

Thanks.

 

[ashiqbal]

As salam o alaikum all. is there a link to the chemistry a course for o levels pdf here?

 

[EXPERTS]

bhai logon please help me out
below is the question of A levels chemistry paper 42 November 2009 Q. 5 :

 

[Shahmeer logan]

Hi
I need igcse biology paper 6 (Atp) notes and repeated questions.
Please if possible can you send them to my email.
[email protected]
Thanks

 

[kiwi seed]

hello peeps

guys i need serious help!!! can anyone provide me with physics answers of "end with chapter questions"

 

[AliveDude905]

hello guys


I need the marking scheme of syllabus 0620 (chemistry) for the year may June 2002 paper 1
does anyone have it? and also I can't find it on any other past paper site
HELP!

 

[Hamnah Zahoor]

hello guys


I need the marking scheme of syllabus 0620 (chemistry) for the year may June 2002 paper 1
does anyone have it? and also I can't find it on any other past paper site
HELP!

Papers | XtremePapers

Revise for your A-levels & GCSEs from latest past papers, revision notes, marking schemes & get answers to your questions on revision, exams or student life on our forums.

papers.xtremepape.rs

https://papers.xtremepape.rs/CAIE/IGCSE/Chemistry%20(0620)/0620_s02_er.pdf

 

[AliveDude905]

Thanks Alot

 

[Hamnah Zahoor]

hello guys


I need the marking scheme of syllabus 0620 (chemistry) for the year may June 2002 paper 1
does anyone have it? and also I can't find it on any other past paper site
HELP!

sometimes when you are not able to find the marking scheme try finding the examination report.

 

[ptet.chemistry]

Hi guys, so about half a year ago, when I was writing up my thesis, I was inspired to start my own Chemistry tutorial channel. It has since humbly continued to attract more viewers (students/learners, I assume) globally.

www.youtube.com/c/ptetchemistry

I have recently resumed teaching, albeit at a different level, and I have continued to update my channel (in my own free time) with more teaching and learning resources including lectorials (lecture tutorials), practical videos, alternative to practical (for those who did not get the chance to actually work in the laboratory) and importantly, my think-aloud tutorials for exam questions.

It is not a fancy channel, but an educational one at best. In my previous work, I was (and still am!) an accomplished synthetic organometallic chemist, working with some of the most air-sensitive compounds. My passion is however in advancing chemical education and affording equal opportunities for all who want to learn from me.

The topical playlists for O/IGCSE/GCSE (pure chemistry and combined science chemistry) make it suitable for any 14-16 years old at various stages of the curriculum, while that for A/IB make it suitable for any 16-18 years old too.

If you feel the work is worthy, do subscribe and share with friends, chat groups, relatives, etc who can benefit from these resources. To those new to YouTube (just in case), subscribing to my channel cost nothing but will support the channel/work.

You can also follow me on ptet.chemistry on IG, FB and Twitter, to get all the latest updates and to stay connected.

Cheers.

 

[AliveDude905]

hey guys
can someone help with this problem?
High pressure will increase the yield of SO3. why the reaction is carried at atmospheric pressure in the contact process?

 

[Faris A.]

Hi Everyone

I desperately need the "Complete Biology for Cambridge IGCSE. I hv attached a pic of the front cover as well. Thx a lot to anyone who helps!

 

[sanjaykader]

Hello Friends, How can I identify Biology Extended Question Paper?
I see there are too many types of papers

 

[Fearless Knight]

The table gives data about four substances.
Which substance has particles in a disorderly arrangement at room temperature?

melting point/ oC l boiling point/oC
A –114.................. l ... –80
B 120 ....................l .....445
C 750 ....................l..... 1407
D 1610.................. l..... 2230

cant understand the query

The answer is A.
The question is asking that at room temperature (about 20-25 C), which of these substances will have particles in a disorderly arrangement (in other words, will be a gas) Since the boiling point of A is -80C so at 25C it will already be a gas. While others have boiling point more than 25 so they will remain solid at room temperature.

 

[Anaeem]

Do you want to succeed forever than obey Allah. May Allah guide you and make you a true Muslim. Life is about finding Allah, following the true path of Islam. A Journey to find Allah................

 

[alisachocobar]

Hello everyone! I am an IGCSE O-levels student and I have been trying to find this Physics past paper - 0625/22/f/m/08 if any of you know where I can find it, it will be really helpful thank you!

 

[aconstellation]

Biology olevel question:
The Cerebellum lies at the back of the brain underneath the Cerebrum and controls the muscle contraction but does not initiate it.The Medulla is the lower half half of the brain stem ,also located underneath the Cerebrum and contains the cardiac center and respiratory center.The heart is also a muscle so the Cerebellum must be responsible for its contraction as well ,but then, what is the role of the Medulla here? Is the role of the Medulla and Cerebellum related? If so,then how? How do they coordinate in the contraction of the heart?

 

[aconstellation]

What is the Atheroma (the yellow mass building up and causing a blockage in the artery) made up of? What are the main reasons for its formation ?

 

[aconstellation]

How much is the factor of genetics responsible for the development of coronary heart disease?Why is a person with a family history of the disease ,more likely to develop it themselves?