HOW WAS CHEMISTRY PAPER 22 ?

[Beaconite007]

In Q.4 does the ester react with NaOH? i m confused

 

[Idolfanatic95]

Yes i got the same. This was the only ques i messed up in, but if this is right then well i m happy

 

[Idolfanatic95]

In Q.4 does the ester react with NaOH? i m confused

It was R-COOH with NaOH, right? The organic compound formed wud be R-COONa

 

[Ansar Khan]

We had to multiply x with 2 first since there were 2 moles of HI present

That 2 will go with the power bro. We weren't supposed to multiply, it simply goes with the power.

 

[Beaconite007]

In B i Wrote color changes frm colorless to brick red
but still m expecting round abt 52. A* u r getting closer

 

[Idolfanatic95]

That 2 will go with the power bro. We weren't supposed to multiply, it simply goes with the power.

As far as I know, it was supposed to be multiplied with x

 

[Nishii]

In B i Wrote color changes frm colorless to brick red
but still m expecting round abt 52. A* u r getting closer

fehling's solution is blue though!

 

[Ansar Khan]

As far as I know, it was supposed to be multiplied with x

See u multiplied it too, plus you wrote it with the power. I think we were only supposed to put it up with the power.

 

[Beaconite007]

fehling's solution is blue though!

yup i will lose 1 mark.

 

[Idolfanatic95]

In B i Wrote color changes frm colorless to brick red
but still m expecting round abt 52. A* u r getting closer

B was with fehlings reagent, right? It wud be from clear blue to opaque orange/red

 

[Ansar Khan]

I also wrote orange to green for A as it was being oxidized from an aldehyde to an acid.

 

[Beaconite007]

B was with fehlings reagent, right? It wud be from clear blue to opaque orange/red

r u all people repeaters???? i m a repeater though

 

[Nishii]

r u all people repeaters???? i m a repeater though

am not..

 

[Idolfanatic95]

See u multiplied it too, plus you wrote it with the power. I think we were only supposed to put it up with the power.

It was supposed to be in both the steps, I think im sure. Anyhow we can still confirm, np

 

[Beaconite007]

A* is my dream. i even thnk of grades when i m sleeping, m mad

 

[Idolfanatic95]

r u all people repeaters???? i m a repeater though

Nope, Taking it for the first time.

 

[Idolfanatic95]

A* is my dream. i even thnk of grades when i m sleeping, m mad

Good Luck

 

[Beaconite007]

Good Luck

gud luck 2 u aswell nd all others.........

 

[TCHS]

My answer is that CaO is the most suitable drying agent, as it won't react with NH3 gas and it's a metal oxide. I searched over the internet and found that actually CaO is suitable for the drying agent of NH3.

My reason was that H2SO4 or HCl might react with NH3 as NH3 is a base and those two are strong acids. I did a practice on ON2005, so I was happy to see similar question--H2SO4 is not a suitable agent with NH3 as it will reacts.

I kinda forgot the question a bit & now Im doubting my answer so could you please remind me what 3 options for drying agents they had given us??

 

[Idolfanatic95]

I kinda forgot the question a bit & now Im doubting my answer so could you please remind me what 3 options for drying agents they had given us??

CaO, H2SO4 and I guess third was HCL