1. Select the correct answer: 1x5-5
(a) SN1 reaction undergoes in
(i) polar aprotic solvent
(ii) polar protic solvent
(iii) non-polar solvent
(iv) None of the above
(b) Aldol condensation between which of the following followed by dehydration gives mesityl oxide?
(i) Two moles of acetaldehyde Two moles of acetone
(iii) CH3CHO and HCHO
(iv) CH3CHO and CH3COCH3
(c) An unknown compound gives a positive haloform test and positive Fehling's test. The compound is
(i) formaldehyde
(ii) acetone
(iii) benzaldehyde
iv) acetaldehyde
(d) Which of the following phenols is most acidic?
(i) o-Nitrophenol
(i) p-Nitrophenol
(iii) 2,4-Dinitrophenol
(iu) 2,4,6-Trinitrophenol
7. Answer any two of the following questions:2x2=4
(a) Mention synthetic applications of the following reagents (any two) :1x2=2
(i) PCC (Pyridinium chlorochromate)
(ii) HIO4 (Periodic acid)
(iii) SeO₂ (Selenium dioxide)
What is Clemmensen reduction? Explain with a suitable reaction. 1+1=2
(c)What is active methylene compound? Show the keto-enol tautomerism in ethylacetoacetate. 1+1=2
8. Mention a diethylmalonate. synthetic
Or
1.Synthesize methyl vinyl ketone from acetone. Answer either Q. No. 9 or Q. No. 10
UNIT-IV
9(a)How will you convert a carboxylic acid into an ester without using an alcohol? Convert acetone to 3-methyl butanoic acid using Reformatsky reaction.
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