Chemistry: Post your doubts here!

[nehaoscar]

Why is 2 wrong?

 

[nehaoscar]

As explained, NaF is expected to have higher mp than KCl.

Sorry, realized I made a typo in my compounds in the earlier posts, i have amended them.

Hahah okay no problem! That's why i was confused Thanks!

 

[Metanoia]

Perhaps you can say why you think A is correct?

View attachment 54527
Why is 2 wrong?

CHO on 2 can be oxidized to COOH. However the benzene ring causes it to be poorly soluble in water.

 

[Falconwing]

http://freeexampapers.com/A-Level/Chemistry/CIE/2013-Jun/9701_s13_qp_12.pdf

Q25 - Answer is D. Why not C? Why do the double bonds not form with the carbon with OH group anyway?

 

[nehaoscar]

How D... and what is the bond angle for Cl2 (option C)?

 

[nehaoscar]

 

[nehaoscar]

 

[nehaoscar]

What does the reaction with NaHCO3 usually give?
Is it like nascent O or H or something?

 

[nehaoscar]

How to do this one??

 

[fantastic girl]

What does the reaction with NaHCO3 usually give?
Is it like nascent O or H or something?

3 - wrong since there is no acid grp

 

[nehaoscar]

What would each one give?

 

[nehaoscar]

Isn't it aluminium that is dimeric covalent?
But then why is answer B :/

 

[Metanoia]

http://freeexampapers.com/A-Level/Chemistry/CIE/2013-Jun/9701_s13_qp_12.pdf

Q25 - Answer is D. Why not C? Why do the double bonds not form with the carbon with OH group anyway?

During dehydration, the OH is removed with a neighboring H atom (either the red dot or blue dot).


Removing the OH and H atom at the red dot gives us option D.

 

[fantastic girl]

What would each one give?

C is it ?
when ever an ammonium salt reacts with an alkali/base u get ammonia gas given off.....make sure u know this!

 

[nehaoscar]

How would 3 peaks be recorded if only 2 isotopes are analysed?

 

[nehaoscar]

How C and why not D?

 

[nehaoscar]

Why C? Why won't NaCl react?

 

[♣♠ Magnanimous ♣♠]

How would 3 peaks be recorded if only 2 isotopes are analysed?

How C and why not D?

Why C? Why won't NaCl react?

Cannot see Image

 

[nehaoscar]

Cannot see Image

Ohh ... wait i'll upload it again

 

[fantastic girl]

Cannot see Image

same here