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

queen of the legend

queen of the legend

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

Kyusam

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Rabb94 said:
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
Click to expand...
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 :/
 
6

6Astarstudent

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Kyusam said:
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 !!
Click to expand...
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
 
K

KWIKIW

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h4rriet said:
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+.
Click to expand...

Thanks.
 
A

aduriz

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nightrider1993 said:
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.
Click to expand...
hey, why A is not correct?
 
K

kingo44

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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
 
K

kingo44

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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

3l_general

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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
 
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