Why do nitro compounds dissolve in sodium hydroxide?
. Aliphatic primary and secondary nitro compounds dissolve in sodium hydroxide solution to give, in general, a yellow solution; on acidification with hydrochloric acid the nitro compound is regenerated. The nitro compounds show
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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) 
Discuss various methods of reduction of esters giving the products formed.
Give the IUPAC names of the following compounds:
(i) 
(ii) 
(iii) BCH 2CH2CH2OH
What is resonance energy? Explain taking the example of benzene.
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.
Predict the product(s) of the following reactions:
(i) Nitration of azole
(ii) Friedel-Crafts acylation of pyridine
(iii) Reduction of pyrrole with zinc and ethanoic acid.