Physics, Chemistry and Biology: Post your doubts here!

[sohaib ul haq]

View attachment 52856View attachment 52855
(c) (mass of ice melted by heater = 16.3 – 2.1) = 14.2 g C1

ml in any form, words, symbols or numbers C1

Wt or Pt in any form, words, symbols or numbers accept VIt C1

338 J/g OR 338 000 J/kg c.a.o A1 [8]

PLZ EXPLAIN WHY WE SUBRECT 2.1 FROM 16.3 ^ MARKSCHEEM

 

[sj0007]

The mass of one mole of an alcohol is 116....what is the molecular formula of the alcohol...please show me steps and thanks in advance

We know that the general formula for an alcohol is C(^n)H(^2n+1)OH and that the Mr of C and H is 12 and 1 respectively, so:
12n + 2n + 1 + 16 + 1 = 116 (oxygen - 16)
14n + 18 = 116
14n = 98
n = 7
So the molecular formula is, C(^7)H(^15)OH................

 

[sj0007]

Exactly and also try variants if you have the time.
If you have solved papers then you might note that 2014 were a BIT different then the previous years.( I felt that)

Yeah, 2014 was different................ even the practicals, I guess

 

[My Name]

PEOPLE CAN I JUST UNDERSTAND ICT THERY CHAP AND DONT DO PASTPAPER OR IF I JUST DO 1 OR 2 PASTPAPER WOULD I GET GOOD MARKS

Yeah, 2014 was different................ even the practicals, I guess

You can post your doubts on this thread:
https://www.xtremepapers.com/community/threads/iɴғᴏʀᴍᴀᴛɪᴏɴ-ᴀɴᴅ-cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ-tᴇᴄʜɴᴏʟᴏɢʏ-0417-pᴏsᴛ-ʏᴏᴜʀ-ᴅᴏᴜʙᴛs-ʜᴇʀᴇ-ᴴᴰ.31964/
and read this:
https://www.xtremepapers.com/community/threads/iɴғᴏʀᴍᴀᴛɪᴏɴ-ᴀɴᴅ-cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ-tᴇᴄʜɴᴏʟᴏɢʏ-0417-pᴏsᴛ-ʏᴏᴜʀ-ᴅᴏᴜʙᴛs-ʜᴇʀᴇ-ᴴᴰ.31964/#post-721931
( About he theory part ^
and obviously you'll have to prepare and revise according to your time.)

 

[sj0007]

You can post your doubts on this thread:
https://www.xtremepapers.com/community/threads/iɴғᴏʀᴍᴀᴛɪᴏɴ-ᴀɴᴅ-cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ-tᴇᴄʜɴᴏʟᴏɢʏ-0417-pᴏsᴛ-ʏᴏᴜʀ-ᴅᴏᴜʙᴛs-ʜᴇʀᴇ-ᴴᴰ.31964/
and read this:
https://www.xtremepapers.com/community/threads/iɴғᴏʀᴍᴀᴛɪᴏɴ-ᴀɴᴅ-cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ-tᴇᴄʜɴᴏʟᴏɢʏ-0417-pᴏsᴛ-ʏᴏᴜʀ-ᴅᴏᴜʙᴛs-ʜᴇʀᴇ-ᴴᴰ.31964/#post-721931
( About he theory part ^
and obviously you'll have to prepare and revise according to your time.)

THANKU!!! That was pretty helpful!

 

[My Name]

THANKU!!! That was pretty helpful!

Welcome

 

[Mustafa84922]

Okay (lol) we subtract it coz that volume has been used that is it is no longer in the cylinder
So we consider the amount of volume present in the cylinder to know the number of inflated balloons

Thank you very much you are really helpful
Btw did you take pakistan studies or do you know anyone who did? If yes, pls give me some notes or at least tell me the most important topics i have my paper in 2 days and i only know sec 1 and half of sec 2

 

[sj0007]

Thank you very much you are really helpful
Btw did you take pakistan studies or do you know anyone who did? If yes, pls give me some notes or at least tell me the most important topics i have my paper in 2 days and i only know sec 1 and half of sec 2

No, I am really sorry, no one really takes (at least not from my school) pakistan studies cuz like international students don't need to take that subject......... sorry and welcum
Don't worry, just study and I am sure u will ace it!

 

[sj0007]

Thank you very much you are really helpful
Btw did you take pakistan studies or do you know anyone who did? If yes, pls give me some notes or at least tell me the most important topics i have my paper in 2 days and i only know sec 1 and half of sec 2

Incase u haven't seen it, u can ask help from this thread for pakistan studies:
https://www.xtremepapers.com/community/threads/igcse-may-june-2015-exams.36680/

 

[sj0007]

Ummm................. guys what is a non endospermic seed?????

 

[Saad the Paki]

You can post your doubts on this thread:
https://www.xtremepapers.com/community/threads/iɴғᴏʀᴍᴀᴛɪᴏɴ-ᴀɴᴅ-cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ-tᴇᴄʜɴᴏʟᴏɢʏ-0417-pᴏsᴛ-ʏᴏᴜʀ-ᴅᴏᴜʙᴛs-ʜᴇʀᴇ-ᴴᴰ.31964/
and read this:
https://www.xtremepapers.com/community/threads/iɴғᴏʀᴍᴀᴛɪᴏɴ-ᴀɴᴅ-cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ-tᴇᴄʜɴᴏʟᴏɢʏ-0417-pᴏsᴛ-ʏᴏᴜʀ-ᴅᴏᴜʙᴛs-ʜᴇʀᴇ-ᴴᴰ.31964/#post-721931
( About he theory part ^
and obviously you'll have to prepare and revise according to your time.)

Man.. im so scared by the ICT theory paper..
Our school somehow requested CIE to gove them 1 CHECKED pastpaper of a previous student..
So our sir showed it to us and their checking is ssooooo strict.. even our sir was baffled by some of the things...

 

[sohaib ul haq]

Man.. im so scared by the ICT theory paper..
Our school somehow requested CIE to gove them 1 CHECKED pastpaper of a previous student..
So our sir showed it to us and their checking is ssooooo strict.. even our sir was baffled by some of the things...

practical paper were very easy so it is expected that theory paper will be most difficult we ppl r gone

 

[sohaib ul haq]

btw i was doing this english summary and i really cant find the points from the text given can any one help me or give some tips plz by paper is after two days so plz help

 

[sj0007]

btw i was doing this english summary and i really cant find the points from the text given can any one help me or give some tips plz by paper is after two days so plz help

Just practice, u will get the hang of summaries then......... that's what I did..........

 

[sj0007]

Man.. im so scared by the ICT theory paper..
Our school somehow requested CIE to gove them 1 CHECKED pastpaper of a previous student..
So our sir showed it to us and their checking is ssooooo strict.. even our sir was baffled by some of the things...

Really????? God, I am scared now!

 

[sj0007]

Can anyone plzzzz post the nitrogen cycle in a logical order?

 

[My Name]

Man.. im so scared by the ICT theory paper..
Our school somehow requested CIE to gove them 1 CHECKED pastpaper of a previous student..
So our sir showed it to us and their checking is ssooooo strict.. even our sir was baffled by some of the things...

Just know you're theory and practice the papers, try different variants if you have the time.
I myself also saw one of the corrected papers and I to was just""!
It was like I feel yes the student has nicely the question BUT they cut marks for reasons I don't understand!
But don't worry In Sha Allah it'll go great don't worry.
You can post your doubts in the thread IF I have time I'll surely help.

Don't be! In Sha Allah it will be great btw frame your answers properly and take the time to read the question COMPLETELY and CAREFULLY! Don't just write things you know, give the examiner what he wants.
I know that ^ tip seems so obvious but sometimes in a rush we can forget.

 

[My Name]

Really????? God, I am scared now!

Don't be! In Sha Allah it will be great btw frame your answers properly and take the time to read the question COMPLETELY and CAREFULLY! Don't just write things you know, give the examiner what he wants.
I know that ^ tip seems so obvious but sometimes in a rush we can forget.

 

[My Name]

Can anyone plzzzz post the nitrogen cycle in a logical order?

How about take a look at this:
http://igbiologyy.blogspot.com/2014/03/112-nitrogen-cycle.html
(or try a youtube video that can help as well)
That website is good for revision but its according to 2014 syllabus.

 

[skyangel]

You can post your doubts on this thread:
https://www.xtremepapers.com/community/threads/iɴғᴏʀᴍᴀᴛɪᴏɴ-ᴀɴᴅ-cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ-tᴇᴄʜɴᴏʟᴏɢʏ-0417-pᴏsᴛ-ʏᴏᴜʀ-ᴅᴏᴜʙᴛs-ʜᴇʀᴇ-ᴴᴰ.31964/
and read this:
https://www.xtremepapers.com/community/threads/iɴғᴏʀᴍᴀᴛɪᴏɴ-ᴀɴᴅ-cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ-tᴇᴄʜɴᴏʟᴏɢʏ-0417-pᴏsᴛ-ʏᴏᴜʀ-ᴅᴏᴜʙᴛs-ʜᴇʀᴇ-ᴴᴰ.31964/#post-721931
( About he theory part ^RTT
and obviously you'll have to prepare and revise according to your time.)

THANKS IT WORKED I LOOK DE PASTPAPER AND THEY R DIFFERENT AND CONFUSING IT ALSO MADE ME STRESSED AS I WAS UNABLE TO ANS SOME QUESTIONS