P1 MCQ's preparation thread for chemistry ONLY!!!!

[queen of the legend]

ehmm ...any1 having doubts can inbox me ...the thread is too messed up ..its difficult to look for those who posted questions

 

[Pwincessajwa]

ehmm ...any1 having doubts can inbox me ...the thread is too messed up ..its difficult to look for those who posted questions

i have doubts ? how can i msge ?

 

[Rabb94]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_qp_11.pdf
question-4,11,15
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_11.pdf
question- 9,13,14
plzzzzzzzzz anyone

 

[Kyusam]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w09_qp_11.pdf
Why in question 28 is it C not B.....plzzz help me out I'll be really really thankful
Please please please !!

 

[Kyusam]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_qp_11.pdf
question-4,11,15
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_11.pdf
question- 9,13,14
plzzzzzzzzz anyone

MJ 2011 Q 28 - see reducing agent ; the one that basically gets oxidized ; looses it's electron . So here the one that gets oxidized most is the strongest because X^- formed into X2 is oxidation which happened 2 times (most) so it's strongest reducing agent
I really hope u get it :/

 

[6Astarstudent]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w09_qp_11.pdf
Why in question 28 is it C not B.....plzzz help me out I'll be really really thankful
Please please please !!

draw the ions out
– CH2CO2CH3, the hydrogen is lost from the ester group
In B, it is a combination of ethanal with CH3CO2CH2- where the hydrogen is lost from the akyl group of the ester

so it is not combined with – CH2CO2CH3

 

[Mariam Mohamed SX132]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_w06_qp_1.pdf
Q11? please

 

[Rahma Abdelrahman]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w06_qp_1.pdf
Q11? please

can u tell exactly what's your problem here?

 

[Mariam Mohamed SX132]

can u tell exactly what's your problem here?

I want someone to explain how to solve the question! cuz I always confuse equilibrium

 

[Mariam Mohamed SX132]

can u tell exactly what's your problem here?

Nvm someone just explained it

 

[Rahma Abdelrahman]

I want someone to explain how to solve the question! cuz I always confuse equilibrium

Hope you get it isA...

 

[Mariam Mohamed SX132]

Hope you get it isA...
View attachment 28920

Thank you so muchhh <3 ! I do get it!

 

[!>@/^~^\@<!]

Thanks a lot, u were a great help! May you ace in all ur exams.

 

[!>@/^~^\@<!]

Thanks a lot, u were a great help! May you ace in all ur exams.

 

[KWIKIW]

You have to know the reaction that takes place when NH3 is added to AgCl.
AgCl + 2NH3 = [Ag(NH3)3]+ + Cl-. It doesn't act as a base because there's no NH4+ formed. It doesn't act as a reducing agent because nothing is reduced. A ligand is just a complex ion. Now all you have to do is decide whether it's formed with Cl- or Ag+.

Thanks.

 

[aduriz]

Answer is C. Since, –CH2CO2CH3 ions are produced in the presence of strong base, therefore A is not possible. And since a aldehyde should react with it, B and D are not possible since both are ketones and not aldehydes.

hey, why A is not correct?

 

[kingo44]

The Boltzmann distribution shows the number of molecules having a particular kinetic energy at
constant temperature.

number of gas
molecules having
a given energy
0
0
kinetic energy
N
L M
Ea
If the temperature is decreased by 10 °C, what happens to the size of the areas labelled L, M and
N?

L M N
A decreases decreases decreases
B decreases increases decreases
C increases decreases decreases
D increases decreases increases

 

[kingo44]

The Boltzmann distribution shows the number of molecules having a particular kinetic energy at
constant temperature.

number of gas
molecules having
a given energy
0
0
kinetic energy
N
L M
Ea
If the temperature is decreased by 10 °C, what happens to the size of the areas labelled L, M and
N?

L M N
A decreases decreases decreases
B decreases increases decreases
C increases decreases decreases
D increases decreases increases

 

[3l_general]

Can any one help me out with question 6 , s12/12 . Please

 

[3l_general]

0.96g of oxygen gas is contained in a glass vessel of volume 7000 cm3 at a temperature of 30°C.
What is the pressure in the vessel?
A 1.1 kPa
B 2.1 kPa
C 10.8 kPa
D 21.6 kPa