$$ \therefore $$ IUPAC name is trans-2-chloro-3-iodo-2-pentene.
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
Which of the following compounds undergoes nucleophilic substitution reaction most easily?
A
B
C
D
Explanation
Electron withdrawing group like -NO2 facilitates nucleophilic substitution reaction in chlorobenzene.
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
The Lassaigne's extract is boiled with conc. HNO3 while testing for halogens. By doing so it
A
decomposes Na2S and NaCN, formed
B
helps in the precipitation of AgCl
C
increases the solubility product of AgCl
D
increases the concentration of N$$_3^ - $$ ions
Explanation
In case of Lassaigne’s test of halogens, it is
necessary to remove NaCN and Na2S from the
sodium extract, if nitrogen and sulphur are present.
This is done by boiling the sodium extract with
conc. HNO3.
Which one is a nucleophilic substitution reaction among the following ?
A
B
C
D
Explanation
Because of high electronegativities of the
halogen atom, the carbon halogen (C – X) is highly
polarised covalent bond. Thus, the carbon atom
of the C – X bond becomes a good site for attack
by nucleophiles (electron rich species).
Nucleophilic substitution reactions are the most
common reactions of alkyl halides.
Questions Asked from Some Basic Concepts of Organic Chemistry
On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
