Chemistry MCQ thread...

[Mobeen]

Which isomer of C4H10O forms three alkenes on dehydration?
A butan-1-ol
B butan-2-ol
C 2-methylpropan-1-ol
D 2-methylpropan-2-ol

Can someone please explain how to reach the answer?

Think about cis-trans isomer.

OH yes ! we can make them by cis trans .. thanks !

 

[Mobeen]

@shootingstar..look there are 9 carbon double bonding in the original molecule. and after the conversion there are total of 4 carbon double bond remaining( 2 from 1st reidue and 2 from 2nd and 3rd resiude). this means 5 double bond has been removed. As we know one carbon double bond is removed byone hydrogen molecule, 5 carbon double bond is removed by 5 hydrogen molecules.

dude by far ur the only person who has explained this question to me ,, and i got it .. thanks a lot ! :beer:

 

[diwash]

It's my pleasure to help... :beer:

 

[MysteRyGiRl]

Chemistry MCQ thread...

I hope this helps.

@zishi cn u plz explain da equation n how u got it

 

[Octahedral]

 

[AayushR]

Is it C?

 

[libra94]

E=m*c*detla T
m is 200
c is 4.2
DT is 66-18=48'C
45/100 x =200*4.2*48
x=(40320)/(0.45)
...89600 J in 1.6 g
so per gram will be 89600.1.6 =56000 J

 

[Mobeen]

its B right ?

 

[Octahedral]

Yes its B.How did u get it?could you explain it?

 

[shyqueen]

O/N/01.. Q.no 8, 14, 31 and 32.. plzz sumbody explain da answers to dese..!!! :%)

 

[Mobeen]

energy released is X.
45% of X = mcT
0.45x = 200 * 4.2 * (66-18)
solve it and u get
x = 89600.

the energy released per gram = 89600/1.60 = 56000 J.

 

[Mobeen]

octahedral ^

 

[Abdulrab]

please solve this question !!!

 

[Mobeen]

please solve this question !!!

what kind of a file is this .. i cant open .

 

[Abdulrab]

but i opened it !!! its opening !!!

 

[sweetiepie]

can u rite which year which q if u dont mind!!!!

 

[Abdulrab]

but the question is from june 07 Q 34

 

[sweetiepie]

answer is D...

 

[Abdulrab]

how ?? please explain !! thanx

 

[Abdulrab]

please explain it sweetie pie !!! thanx !! i m feeling sleepy