Chemistry: Post your doubts here!

[Metanoia]

View attachment 54821
can someoe please draw the diagrams of the mechanism above?

what year and variant is this from?

 

[ashcull14]

what year and variant is this from?

jue p12 june 2012

 

[asadalam]

View attachment 54821
can someoe please draw the diagrams of the mechanism above?

Its D.Its a straight chain but with the addition of NH3 a ring is formed with a propyl side chain,if i recall.

 

[Tasneem_m98]

Oohh okay thank you so much! Jazak Allah kheir!

No as in propanal the H atom is not bonded to O atom so there will be no H-bonding if you look closely.H bonding requires H to be bonded with a highly electronegative atom like O,but in both cases O is bonded to C not H.

 

[Metanoia]

jue p12 june 2012

It is not really the textbook display of the mechanisms, but here is an idea of how the changes occurred.

 

[ashcull14]

 

[ashcull14]

Its D.Its a straight chain but with the addition of NH3 a ring is formed with a propyl side chain,if i recall.

why is a ring formed?

 

[Metanoia]

View attachment 54823

All options are possible as they have less carbons than octene.

Chemistry: Post your doubts here!

 

[ashcull14]

All options are possible as they have less carbons than octene.

Chemistry: Post your doubts here!

O thnk u

 

[asadalam]

All options are possible as they have less carbons than octene.

Chemistry: Post your doubts here!

Can you please explain this

 

[BhaiArshad]

Is D flipped?

 

[asadalam]

Is D flipped?

Thats the probable reason i thought,because double bond can only exist there and if you flip we get D

 

[Studydayandnight]

How do we solve this??

Correct answer is D.

 

[Studydayandnight]

How is this C?

 

[Studydayandnight]

Camphor is a white solid which was used to make the early plastic celluloid. Camphor contains the same percentage by mass of hydrogen and oxygen. What is the molecular formula of camphor?

A C10H6O6
B C10H8O
C C10H16O
D C10H10O2

Correct answer is C, how??

 

[Metanoia]

Can you please explain this

I don't have the data booklet now to confirm, radical C comes from the breaking of C -Cl bond, compared to the other bonds in the other options, it should be the easiest to break.

A and B involves the breaking of C-F bond.
D involves breaking C-H bond.

 

[Metanoia]

How is this C?

1- tertrahederal
2- trigonal planar
3- bent

 

[Metanoia]

Camphor is a white solid which was used to make the early plastic celluloid. Camphor contains the same percentage by mass of hydrogen and oxygen. What is the molecular formula of camphor?

A C10H6O6
B C10H8O
C C10H16O
D C10H10O2

Correct answer is C, how??

Option C
Mr contributed by H = numer of atoms x Ar= 16 x 1 = 16
Mr contributed by O = number of atoms x Ar= 1 x 16 =16

 

[nehaoscar]

Why D?
Why not the others?

 

[nehaoscar]

What does it mean by it melts over a range of temperature?