23. rite the structures of the following compounds:
24. (i) Methyl 3-methylbutanoate

2. 4-Hydroxy-4-methyl-2-pentanone

write the chemical equation for following named reactions:

(a) Reimer-Tiemann reaction

(b) Kolbe reaction

(c) Claisen reaction

(d) Knoevenagel reaction

(e) Willgerodt reaction

Explain the following:

(i) Alkanes with odd number of carbon atoms have low melting point than those with an even number.

(ii) Wurtz reaction is not very useful when two different alkyl halides are used.

What is aci form of nitroethane? Discuss.

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.

Arrange the following in the decreasing order of their basic strength:

alkanide anion; alkenide anion; alkynide anion

Justify your answer.