HOW WAS CHEMISTRY PAPER 22 ?

[Nishii]

yea maan only b had a colour change xD.. for equilibrium it was (2x)^2/(0.02-x)^2=59 right? and decrease in temperature favours the forward reaction, pressure has no effect ey?

yup!

 

[babycry]

yup!

what do u think ull get out of 60?

 

[Nishii]

what do u think ull get out of 60?

over 50, i didnt have time to come back to the Kc question, i lost 4 points, and 3 on the last question, i have put structural isomerism..

 

[Taci12]

yea maan only b had a colour change xD.. for equilibrium it was (2x)^2/(0.02-x)^2=59 right? and decrease in temperature favours the forward reaction, pressure has no effect ey?

Don't remember about the decrease in temperature, but the equilibrium is correct and pressure thing too. Let's hope p4 is just as sweet!

 

[AhShun]

Was a nice paper

 

[Ansar Khan]

There were 3 out of 6, which had no reaction.
I dont remember much but i guess last 2 and the first one.

I guess the first reaction was for an aldehyde being oxidised to a carboxylic acid. I wrote orange to green. I don't think it was a tertiary alcohol. The compound to be oxidized was (CH3)3CHO. Wouldn't the aldehyde group be oxidized to a carboxylic acid?

 

[MrAnon]

i drew cis-trans for first one and the second part i drew optical

How can we draw an optical one with ? :S
Do you remember the exact wordings in the question?

 

[MrAnon]

They said stereoisomerism . Cis trans and optical were the ONLY possibilities.

Do you remember the exact wording in the question?

How can we draw an optical in a C=C?

Did the question said "also" stereo isomerism?
I don't remember anything.

 

[Ansar Khan]

People please, I want u all to focus on that first organic question. I mean how can we have 10 marks for 6 boxes and 1 color change. Guys please tell what products were u getting on that table and how many "no reactions" were present?

 

[Idolfanatic95]

Do you remember the exact wording in the question?

How can we draw an optical in a C=C?

Did the question said "also" stereo isomerism?
I don't remember anything.

C=C would be written as it is, the rest wud be displayed. Double cannot be further shown in a displayed formula

 

[Beaconite007]

i wrote 4 two zinc compounds zincoxide nd zinchyroxide r they correct???

 

[Idolfanatic95]

relieved! and did you have only B for the second table?

Yep i had only B. But the marks distribution was weird. 10 marks for the tables :O

 

[Idolfanatic95]

i wrote 4 two zinc compounds zincoxide nd zinchyroxide r they correct???

Dude wht's zinchyroxide?

 

[Idolfanatic95]

What was the deal with the first ques where they asked about 15mg of zinc per day thing? :S

 

[Idolfanatic95]

yea maan only b had a colour change xD.. for equilibrium it was (2x)^2/(0.02-x)^2=59 right? and decrease in temperature favours the forward reaction, pressure has no effect ey?

Yep all right

 

[Beaconite007]

Dude wht's zinchyroxide?

its ZN(OH)2 mam
so i will lose 1 mark????

 

[Idolfanatic95]

its ZN(OH)2 mam
so i will lose 1 mark????

I know it by the name zinc hydroxide. It's correct

 

[Ansar Khan]

For equilibrium, it was (0+x)^2 / (0.02-x)^2. And then x was 0.018. What did u guys get?

 

[Ansar Khan]

Yep i had only B. But the marks distribution was weird. 10 marks for the tables :O

Tell me about the first compound. Wasn't it an aldehyde being oxidised into a crboxylic acid?

 

[Iadmireblue]

how many grams of zinc ethonate need to be taken for 15 mg of zinc?
ai got something less than 1 i think it was 0.05 or something