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Hydrocarbons · Question 41

AIPMT 2010 (Prelims)MCQEasy📈 Topic in 12% papers+4−1
1

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

  1. oxidation
  2. cracking
  3. distillation under reduced pressure
  4. hydrolysis

Answer

(2) cracking

Solution

As per NCERT, higher alkanes on heating to high temperature decompose into lower alkanes, alkenes etc. This is called pyrolysis or cracking.

e.g. C6H14 773 K C4H8 + C2H6

Cracking converts liquid hydrocarbons into a mixture of gaseous hydrocarbons.

Answer: (2)

AIPMT 2010 (Prelims)

Keep practising — Hydrocarbons

2

Benzene reacts with CH3Cl in the presence of anhydrous AlCl3 to form

  1. chlorobenzene
  2. benzyl chloride
  3. xylene
  4. toluene.
AIPMT 2009
3

Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4. In the mixture, nitric acid acts as a/an

  1. acid
  2. base
  3. catalyst
  4. reducing agent
AIPMT 2009
4

H3C- CH3 |CH-CH=CH2 + HBr A A (predominantly) is

  1. CH3- Br |CH- CH3 |CH-CH3
  2. CH3- CH3 |CH- Br |CH-CH3
  3. CH3- CH3 |CH-CH2-CH2Br
  4. CH3- Br | CH3 |C-CH2CH3
AIPMT 2008
5

The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) toluene (iii) chlorobenzene (iv) phenol

  1. (ii) > (iv) > (i) > (iii)
  2. (iv) > (iii) > (ii) > (i)
  3. (iv) > (ii) > (i) > (iii)
  4. (i) > (ii) > (iii) > (iv)
AIPMT 2007
6

Predict the product C obtained in the following reaction of 1-butyne. CH3CH2-C CH + HCl B HI C

  1. CH3-CH2-CH2- Cl | I |C-H
  2. CH3-CH2- I |CH-CH2Cl
  3. CH3CH2- Cl | I |C-CH3
  4. CH3- Cl |CH-CH2CH2I
AIPMT 2007
7

Which of the compound with molecular formula C5H10 yields acetone on ozonolysis?

  1. 3-Methyl-1-butene
  2. Cyclopentane
  3. 2-Methyl-1-butene
  4. 2-Methyl-2-butene
AIPMT 2007
8

The correct order regarding the electronegativity of hybrid orbitals of carbon is

  1. sp < sp2 < sp3
  2. sp > sp2 < sp3
  3. sp > sp2 > sp3
  4. sp < sp2 > sp3
AIPMT 2006
9

Which one of the following alkenes will react faster with H2 under catalytic hydrogenation conditions ?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2005
10

Products of the following reaction : CH3C CCH2CH3 [(ii) hydrolysis](i) O3 are

  1. CH3COOH + CO2
  2. CH3COOH + HOOC.CH2CH3
  3. CH3CHO + CH3CH2CHO
  4. CH3COOH + CH3COCH3
AIPMT 2005
11

Using anhydrous AlCl3 as catalyst, which one of the following reactions produces ethylbenzene (PhEt)?

  1. H3C-CH2OH + C6H6
  2. CH3-CH=CH2 + C6H6
  3. H2C=CH2 + C6H6
  4. H3C-CH3 + C6H6
AIPMT 2004

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