paper 12 chemistry ...

[Saad Sarfraz]

Guys question 38 please help. the question was something like this what is same in optical isomerism
1. emperical formula
2. stuctural formula
3. function group
i chose A..
and another one qstn 37 i think
they game us propene or smething like this and said what can be made in a single reaction
I chose B...anyone remember this qstnz answer

 

[Saad Sarfraz]

Can someone tell me the question number of the question to which answer was 3 possible products was B ?

I think 37 and i also chose B \m/

 

[creative22]

I think 37 and i also chose B \m/

Are you sure it was Q.37 :/

 

[Prince III]

Guys question 38 please help. the question was something like this what is same in optical isomerism
1. emperical formula
2. stuctural formula
3. function group
i chose A..
and another one qstn 37 i think
they game us propene or smething like this and said what can be made in a single reaction
I chose B...anyone remember this qstnz answer

for the optical Isomer All were correct Option A

 

[saurabh]

it is c 10.8 kpa

 

[Saad Sarfraz]

Are you sure it was Q.37 :/

No man i think it was either 36-37 or maybe 35 but im pretty sure on the answer..

 

[Saad Sarfraz]

Are you sure it was Q.37 :/

No man i think it was either 36-37 or maybe 35 but im pretty sure on the answer..

 

[Saad Sarfraz]

25 c
26 c
27 d
28 d
i am confused about 29 and 30 ..

Man can u please tell me what were questions 25,26, and 28 ive forgotten..29 was C and 30 also forgotten ;D

 

[Saad Sarfraz]

i did it wrong but i think it was A

what was the qustnz..ARRR seem to have forgotten it

 

[Saad Sarfraz]

Guys does anyone remember that brownsy lowry ammonia 1..i went with C because the first option co-ordinate covalent bond was wrong

 

[mujtabashahnawaz]

Guys question 38 please help. the question was something like this what is same in optical isomerism
1. emperical formula
2. stuctural formula
3. function group
i chose A..
and another one qstn 37 i think
they game us propene or smething like this and said what can be made in a single reaction
I chose B...anyone remember this qstnz answer

Same answers for both q from my side ​

 

[Saad Sarfraz]

it was a tertiary alcohol

is this question 30? and if its not can u tell me what was the question ive forgotten it

 

[Saad Sarfraz]

Yes

is this question 30? and if its not can u tell me what was the question ive forgotten it

 

[mujtabashahnawaz]

thats not true ..bond length increases down the group ,so bond energy decreases....I guess the option was -Bond energy -increase
Bond polarity-decrease
Bond length -increase
...the answer should be C ,2 and 3 correct.

The option was.. bond energy_ decreases so it was A, CAMBRIDGE had changed the word and the answer changed

 

[mujtabashahnawaz]

Actually the ques was
1 bond length increases
2 bond energy decreases
3 bond polarity decreases... or sth like tht..
Nywy, I did A

Agreed

 

[Saad Sarfraz]

Guys anyone remember than finding energy of formation of PBO something i went with D..and also the one which asked for the skeletal formula..i choosed A on it

 

[mujtabashahnawaz]

Same here, D and A

 

[gary221]

Guys anyone remember than finding energy of formation of PBO something i went with D..and also the one which asked for the skeletal formula..i choosed A on it

With d PbO thing, i did D as well!
And yup, A for skeletal!!

 

[TheFahim94]

wht abt the angle of nitrogen one??? 107 ??

yes...answer was D

 

[nikhil000]

I will get 25 for sure ..now that will be a C ...If GT for A gets around 28 ,then it would be a B ...Finger crossed.