NEET Chemistry - New - Haloalkanes and Haloarenes

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Question - 1

Identify the major products P, Q and R in the following sequence of reactions :

  • A
  • B
  • C
  • D

Question - 2

The compound C7H8 undergoes the following reactions:
\({ C }_{ 7 }{ H }_{ 8 }\overset { 3{ CL }_{ 2 }/\triangle }{ \longrightarrow } A\overset { { Br }_{ 2 }/Fe }{ \longrightarrow } B\overset { Zn/HCl }{ \longrightarrow } C\) The product 'C' is 

  • A m-bromotoluene
  • B o-bromotoluene
  • C 3-bromo-2,4,6-trichlorotoluene
  • D p-bromotoluene

Question - 3

Which of the following biphenyl is optically active?

  • A
  • B
  • C
  • D

Question - 4

Consider the reaction, CH3CH2CH2Br+ NaCN ⟶ CH3CH2CH2CN + NaBr 
This reaction will be the fastest in :

  • A ethanol
  • B methanol
  • C N, N'-dimethylformamide (DMF)
  • D water

Question - 5

In an SNreaction on chiral centres, there is:

  • A inversion more than retention leading to partial racemisation
  • B 100% retention
  • C 100% inversion
  • D 100% racemisation

Question - 6

Twopossible stereo-structures of CH3CHOHCOOH, which are optically active, are called:

  • A atropisomers
  • B enantiomers
  • C mesomers
  • D diastereomers

Question - 7

The reaction of C6H5CHCH=CH3 with HBr produces:

  • A C6H5CH2CH2CH2Br
  • B
  • C C6H5 \(\underset { \overset { | }{ Br } }{ CH } \) CH2CH3
  • D C6H5CH2 \(\underset { \overset { | }{ Br } }{ CH } \) CH3

Question - 8

Which of the following compounds will undergo racemisation when solution of KOH hydrolyses?

  • A (i) and (ii)
  • B (ii) and (iv)
  • C (iii) and (iv)
  • D (i) and (iv)

Question - 9

Which of the following acid does not exhibit optical isomerism?

  • A Maleic acid
  • B \(\alpha \)-amino acid
  • C Lactic acid
  • D Tartaric acid

Question - 10

In the replacement reaction

The reaction will be most favorable if M happens to be :

  • A Na
  • B K
  • C Rb
  • D Li