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Organic Chemistry – Some Basic Principles and Techniques · Question 50

AIPMT 2009MCQEasy📈 Topic in 12% papers+4−1
1

The IUPAC name of the compound having the formula CH C-CH=CH2 is

  1. 1-butyne-3-ene
  2. but-1-yne-3-ene
  3. but-1-en-3-yne
  4. 3-butene-1-yne.

Answer

(3) but-1-en-3-yne

Solution

Numbering from either end gives the multiple bonds the locants 1 and 3.

∵ When there is a choice, the double bond is given the lower number,

⇒ numbering starts from the CH2 end: 4CH 3C- 2CH= 1CH2

∴ IUPAC name: but-1-en-3-yne

Answer: (3)

AIPMT 2009

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2

The state of hybridisation of C2, C3, C5 and C6 of the hydrocarbon, [figure] is in the following sequence

  1. sp3, sp2, sp2 and sp
  2. sp, sp2, sp2 and sp3
  3. sp, sp2, sp3 and sp2
  4. sp, sp3, sp2 and sp3
AIPMT 2009
3

Base strength of [figure] is in the order of

  1. (i) > (iii) > (ii)
  2. (i) > (ii) > (iii)
  3. (ii) > (i) > (iii)
  4. (iii) > (ii) > (i)
AIPMT 2008
4

Which one of the following is most reactive towards electrophilic attack?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2008
5

The stability of carbanions in the following [figure] is in the order of

  1. (iv) > (ii) > (iii) > (i)
  2. (i) > (iii) > (ii) > (iv)
  3. (i) > (ii) > (iii) > (iv)
  4. (ii) > (iii) > (iv) > (i)
AIPMT 2008
6

In the hydrocarbon, 6CH3- 5CH= 4CH- 3CH2- 2C 1CH The states of hybridization of carbons 1, 3 and 5 are in the following sequence

  1. sp, sp2, sp3
  2. sp3, sp2, sp
  3. sp2, sp, sp3
  4. sp, sp3, sp2
AIPMT 2008
7

For (i) I-, (ii) Cl-, (iii) Br-, the increasing order of nucleophilicity would be

  1. Cl- < Br- < I-
  2. I- < Cl- < Br-
  3. Br- < Cl- < I-
  4. I- < Br- < Cl-
AIPMT 2007
8

Consider the following compounds (i) C6H5COCl (ii) [figure] (iii) [figure] (iv) [figure] The correct decreasing order of their reactivity towards hydrolysis is

  1. (i) > (ii) > (iii) > (iv)
  2. (iv) > (ii) > (i) > (iii)
  3. (ii) > (iv) > (i) > (iii)
  4. (ii) > (iv) > (iii) > (i)
AIPMT 2007
9

The general molecular formula, which represents the homologous series of alkanols is

  1. CnH2nO
  2. CnH2nO2
  3. CnH2n+2O
  4. CnH2n+1O
AIPMT 2006
10

The IUPAC name of [figure] is

  1. 1-chloro-1-oxo-2, 3-dimethylpentane
  2. 2-ethyl-3-methylbutanoyl chloride
  3. 2, 3-dimethylpentanoyl chloride
  4. 3, 4-dimethylpentanoyl chloride.
AIPMT 2006
11

The general molecular formula, which represents the homologous series of alkanols is

  1. CnH2n+2O
  2. CnH2nO2
  3. CnH2nO
  4. CnH2n+1O
AIPMT 2006

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