Chemistry MCQ thread...

[hassam]

 

[Xthegreat]

both Sn1 and Sn2 have intermediates
its just that the Sn2's intermediate is a very fast step such that it is often ignored.

aha, so if they ask which one has intermediate steps (like in a 1,2,3 question) , is it yes for SN2??

i dunno for sure because nothing like this came up before. but i'll put a yes for my own answer cause when you draw out the mechanism, you include the intermediate stage too rite?

 

[Saturation]

zISHii...come'on i posted a tuff one for u

When they mean oxidisation, is it FULL or just to an aldehyde?

 

[xHazeMx]

i would say it's B

 

[Aloo007]

@ hassam this one has got to be B

 

[hassam]

ya B RYT....

 

[Saturation]

B!

 

[ideggkr]

.

 

[xHazeMx]

ya B RYT....

:Yahoo!:

 

[Xthegreat]

ans A?

 

[hassam]

B!

no its wrong...sulfur has a lone pair also chek again

 

[diwash]

Hassam..is the answer A

 

[hassam]

thats an R rated questiom

 

[xHazeMx]

how angle Y is 110 degrees ??? .. its not tetrahedral isnt it ?

 

[Saturation]

B!

no its wrong...sulfur has a lone pair also chek again

Can someone pls explain!? 4 cvalent bonds with sulfur, so that's 8 electrons right?

 

[ideggkr]

ya B RYT....

Why is Y like that?

I thought Y was the product when the fluo-sth undergoes hydrogenation

Shouldn't the ketone group intact?

 

[Aloo007]

THIS ONES A?

 

[xHazeMx]

thats an R rated questiom

A?

 

[histephenson007]

is it A?

 

[hassam]

i didnt understnd that question completely,,,i don understand where thos powers came from ans is B...CN anyone clear me this
well S has 6e- so 2 went in single bonds and 2 in double bond...so wheres the other 2