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Chemistry Organic synthesis question help?

https://mathsmadeeasy.co.uk/wp-content/uploads/2017/11/AQA-CHEM4-QP-JUN16.pdf

part 4c?

I don't understand the answer
P: No reaction for all tests
Q: As appropriate below
ammonia -> white fumes
na2co3 -> effervescence
(named) ??idk which alcohol -> sweet smell
naoh + acidified silver nitrate -> white precipitate
silver nitrate -> white precipitate
water -> misty fumes.

Can someone explian why Q has these observations, I think Q is a aldehyde and P a ketone but not sure. ?
Reply 1
Avatar for yusyus
yusyus
21
Original post by Turquoise01
https://mathsmadeeasy.co.uk/wp-content/uploads/2017/11/AQA-CHEM4-QP-JUN16.pdf

part 4c?

I don't understand the answer
P: No reaction for all tests
Q: As appropriate below
ammonia -> white fumes
na2co3 -> effervescence
(named) ??idk which alcohol -> sweet smell
naoh + acidified silver nitrate -> white precipitate
silver nitrate -> white precipitate
water -> misty fumes.


Can someone explian why Q has these observations, I think Q is a aldehyde and P a ketone but not sure. ?

Well for Q for any alcohol an ester will form as it has an acyl chloride group. Do you know about the reaction of acyl chlorides with alcohols?
Reply 2
Avatar for yusyus
yusyus
21
Original post by Turquoise01
https://mathsmadeeasy.co.uk/wp-content/uploads/2017/11/AQA-CHEM4-QP-JUN16.pdf

part 4c?

I don't understand the answer
P: No reaction for all tests
Q: As appropriate below
ammonia -> white fumes
na2co3 -> effervescence
(named) ??idk which alcohol -> sweet smell
naoh + acidified silver nitrate -> white precipitate
silver nitrate -> white precipitate
water -> misty fumes.

Can someone explian why Q has these observations, I think Q is a aldehyde and P a ketone but not sure. ?


essentially P just reacts like a halogenoalkane while Q reacts like an acyl chloride
Original post by bruh2132
essentially P just reacts like a halogenoalkane while Q reacts like an acyl chloride


I see thank you! The alcohol just reacts to produce an ester, right?
Reply 4
Avatar for yusyus
yusyus
21
Original post by Turquoise01
I see thank you! The alcohol just reacts to produce an ester, right?

exactly

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