Hydrocarbons

Question 1

NH2NH2-H2O2

Answer 1

reduces only C=C bonds

Question 2

LiAlH4 gives

Answer 2

H- anion

Question 3

P+HI or

Answer 3

hot HI

Question 4

hot HI or

Answer 4

P+HI

Question 5

Hot HI or P+HI:
R-OH+HI------->RI+H2O
                             |
                             | (HI)
                             v

Answer 5

R-H

Question 6

for one mole of alcohol,x moles of hot HI is required

x=?

Answer 6

2

Question 7

medium for wolff kishner reduction and what it means to you

Answer 7

base medium
OH- will attack the EWG groups present in substrate
meanwhile, C=O will reduce to single bond CH2-CH2

Question 8

Wurtz reaction
1) Mg/Et2O
2) Mg/THF
differences in two reagents used and which is preferred

Answer 8

1) cannot break resonance stabilized bonds
2) breaks resonance stabilized bonds

THF is preffered

Question 9

intermediate type formed in wurtz reaction

Answer 9

negative charge on carbon with leaving group

Question 10

grignard reagent is unstable in _____ solvent. Why?

Answer 10

In PROTIC reagent. because,H of protic solvent will react with the reagent and hence leading to formation of an alakane
highly undesirable

Question 11

Aromatisation?

Answer 11

using Cro3/Al2O3

Question 12

H3C-CH2-CH2-CH2-CH2-CH3 undergoing aromatization

also mention how many moles of H2 will be release

Answer 12

benzene+ 4 H2

Question 13

Octane number

Answer 13

efficiency of a fuel

Question 14

BTX?

used?

Answer 14

Benzene
Toluene
Xylene
increases efficiency of a fuel/increases octane number

Question 15

non-terminal alkynes are 
(no hydrogen at end)
\_\_\_\_\_(reduced/non-reduced)
[BY LIQ.NH3/Na)
terminal alkynes are not \_\_\_\_(""""")

Answer 15

reduced

non-reduced

Question 16

terminal alkenes can be ____ by liq.NH3/Na

Answer 16

reduced

eg. CH3-CH=CH2—–> CH3-CH2-CH3

Question 17

DEHYDRATION USING CONC.____
WRITE MECHANISM

Intermediate formed?

Answer 17

H2So4
write reaction
A carbocation

Question 18

two charecterstics of dehydration by Al2O3

Answer 18

1) no carbocation formed
2) E2 rn
3) saytzeff major product

Question 19

Dehydration by ThO2

a) type of mechanism?
b) major product formed

Answer 19

a) E2

b) Hoffman

Question 20

CH3CH2CH(OH)CH3

• —————>
  a) reagent: ThO2/heat
  b) reagent: Al2O3

Answer 20

write it on your own

a) hoffman major
b) saytzeff major

Question 21

relation between attacking reagent in dehydration and basicity

Answer 21

chances of getting hoffman product increases as crowding increases

Question 22

pyrolysis of ester

Answer 22

heating of ester

Question 23

WITH MECHANISM

CH3-CH2-O-C=O-CH3————>
heat

Answer 23

solution

https://www.youtube.com/watch?v=AlA46WFt9HA

Question 24

VERY IMPORANT
HUGH PRIORITY

CO+H2+CH2=CH2——->?

Answer 24

step 1: from CO & H2 we get HCHO

and then prins reaction goes on