Fill in the following blanks:
(i) In the UV spectrum, the ethylenic chromophore shows an absorption band below -------------- nm.
(ii) In the IR spectrum, the cis isomer of internal alkenes gives band at --------- cm-1.
(i) In the UV spectrum, the ethylenic chromophore shows an absorption
_________ ________ ___ ___ ______ ___ _______ _____ _______ _____ _____ ____.
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What are the limitations of Friedel-Crafts alkylation?
Suggest the reaction that can best be used to prepare following ethers by Williamson ether synthesis
(a) CH3CH 2— O— CH= CH2
(b) 
How will you prepare the following ?
(i) 10 -Hexyne from ethyne
(i) Ethanol from ethyne
(ii) 3-Hexanone from 3-hexyne.
| What are racemic mixtures? How are they obtained? Discuss one method of their |
| resolution. |
Give the IUPAC names of the following compounds:
(i) 
(ii) 
(iii) BCH 2CH2CH2OH
| Give reason for the following: |
|
|
|
2-Position of pyrrole is more reactive towards electrophilic substitution than
3-position. Explain giving all possible resonance structures of carbocations formed. Explain.