Question

(14) Question 1: Xylene contains which functional group attached to the benzene ring?

a - methoxy

b -amino

c -methyl

d -ester

(22) Question 2: Reactions of aromatic compounds are:

a- addition

b- electrophilic aromatic substitution

c- nucleophilic aromatic substitution

d- reduction

(24) Question 3: what is the percent of p character is an sp2 hybrid orbital?

a- 66%

b- 25%

c- 33%

d-75%

(20) Question 4: Identify the compound below that can be drawn separately as both a cis and a trans isomer.

a- 1-octene

b- 2-butene

c- 2-propene

d- 2-methylhexane

(13) Question 5: which of the following metals is not a catalyst used in the hydrogenation of alkynes to alkanes?

a- Pi

b- Au

c- Pd

D- Ni

Thank you so much!

Answer 1

xylene is CH3-C6H4-CH3 .Two methyl group is present i benzene ring

option C- methyl
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15)
In aromatic compounds there are delocalized electron clouds present.So electron
defficient speices will get attracted and it undergoes electrophilic substitution
reaction

option B- electrophilic substitution reaction
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contribution of s or p orbitals towards sigma bond is s or p character
In sp3 it is 25 % s and 75 % P
In sp2 it is 33.33 % s and 66,66 % p
In sp ; 50 % s and 50% p

Option A= 66 %
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For cis trnas isomerism ;
1.there should be double bond between C-C atom

2.Also each of these C atom should have two different group attached

1-octene ch3 -(ch2)6-ch=ch3 .2nd criteria is not satisfied

2-butene ch3-ch=ch-ch3 .It can exhibit cis-trans isomerism since there
is double bond and each othos c atom has twoo different group [ h and ch3]

2-propene- 2nd criteria is not satisfied

2-methyl hexane- first criteria is not satisfied

option B- 2-butene
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Au,Ni,Pd is used as catalyst
option A;Pi
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All solved .kindly rate