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 Multiple Choice QuestionsMultiple Choice Questions

41.

By passing excess Cl2 (g) in boiling toluene, which one of the following compounds is exclusively formed?


42.

Reaction of formaldehyde and ammonia gives

  • hexamethylene tetramine

  • bakelite

  • urea

  • triethylene tetramine


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43.

Which of the following compounds is not formed in iodoform reaction of acetone?

  • CH3COCH2I

  • ICH2COCH2I

  • CH3COCHI2

  • CH3COCI3


B.

ICH2COCH2I

Mechanism of iodoform reaction takes place by two steps

(i) Iodonation of  group to form 

CH3-CO-CH3 OI- CH3-CO-CH2I + OH-

CH3-CO-CH2OI- CH3-CO-CHI2 + OH-

CH3-CO-CHI2 OI- CH3-CO-CI3 + OH-

(ii) Elimination of -CI3 as :CI3 anion


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44.

A compound (A) C4H8Cl2 on alkaline hydrolysis to give compound (B) C4H8O which gives an oxime and positive Tollen's reagent test. What is the structure of (A)?

  • CH3CH2CH2CHCl2

  • CH3CCl2CH2CH3

  • CH3CH(Cl)CH(Cl)CH3

  • CH2ClCH2CH2CH2Cl


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45.

Which of the following is highly acidic in nature?


46.

In the reaction,

CH3-CH2-Cl KCN (A) Complete hydrolysis(B), end product (B) is

  • CH3 - CH2 - CN

  • CH3 - CH2 - CONH2

  • CH3 - CH2 - COOH

  • CH3 - CH2 - CH2 - CH2 - CN


47.

A colourless water soluble organic liquid decomposes sodium carbonate and liberates CO2. It produces black ppt with Tollen's reagent. The liquid is

  • acetaldehyde

  • acetamide

  • formic acid

  • acetone


48.

Order of ease of decarboxylation of the following acids is

(i) CH3COOH

(ii) CH2=CH-CH2.COOH

(iii) CH2(COOH)2

(iv) 

  • i > ii > iii > iv

  • iii > iv > ii > i

  • iv > iii > ii > i

  • i > iii > ii > iv


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49.

The final product of the following sequence of reaction is

CH2=CH2 CCl4Br2 (A) KCN (B) H+ / H2O (C)


50.

The enol form of acetone, after treatment with D2O gives


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