Draw cis and trans- isomers of 1,3-cyclobutanedicarboxylic acid. Comment on the dipole moment of these isomers.
cis
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Write the mechanism for the Haloform reaction.
What is aci form of nitroethane? Discuss.
Suggest the reaction that can best be used to prepare following ethers by Williamson ether synthesis
(a) CH3CH 2— O— CH= CH2
(b) 
Explain the following in one to two lines.
(i) Alkenes are more soluble in water than corresponding alkanes.
(ii) Addition reactions of alkenes are exothermic processes.
(iii) Hydroboration appear as anti-Markownikoff’s addition.
write the chemical equation for following named reactions:
(a) Reimer-Tiemann reaction
(b) Kolbe reaction
(c) Claisen reaction
(d) Knoevenagel reaction
(e) Willgerodt reaction
Discuss various methods of reduction of esters giving the products formed.
What is resonance energy? Explain taking the example of benzene.