Ethylidene dichloride is obtained by the reaction of excess of HC

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 Multiple Choice QuestionsMultiple Choice Questions

41.

In which of the below reaction do we find α,β-unsaturated carbonyl compounds undergoing a ring closure reaction with conjugated dienes?

  • Perkin reaction

  • Diels-Alder reaction

  • Claisen rearrangement

  • Hofmann reaction


42.

IUPAC name of the compound

  • 5-methyl-4-iso propyl-6, 6' diethyloctane

  • 3,3-dimethyl, 3-ethyl-5-isopropyl octane

  • 3,3-diethyl-4-methyl-5-(1,1-dimethyl) octane

  • 3,3-diethyl-4-methyl-5-(1'-methylethyl) octane


43.

Consider the following carbocations,

(I) C6H5C+H2                        (II) C6H5CH2C+H2(III) C6H5C+HCH3                (IV) C6H5C+(CH3)2

The correct sequence of the stability of these is

  • II < I < III < IV

  • II < III < I < IV

  • III < I < II < IV

  • IV < III < I < II


44.

2 2-dichloro propane on hydrolysis yields

  • acetone

  • 2, 2-propane diol

  • isopropyl alcohol

  • acetaldehyde


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45.

For synthesis of 1-butene, CH3MgI should be treated with

  • propene

  • 2-chloropropene

  • allyl chloride

  • ethyl chloride


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46.

Ethylidene dichloride is obtained by the reaction of excess of HCl with

  • ethylene

  • acetylene

  • propene

  • methane


B.

acetylene

Alkenes due to presence of only 1° of unsaturation, form only monochloro derivative.

CHCHAcetylene + HCl  CH2=CHClVinyl chloride HCl CH3CHCl2Ethylidene dichloride


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47.

Hardening of oil is done by

  • dehydrogenation

  • hydrogenation

  • dehydrohalogenation

  • dehydration


48.

Which one of the following compounds will react with methyl magnesium iodide ?

  • CH3CH2CH2CH2CH3

  • CH3CH=CH-CH=CH2

  • CH3-CC-CH2CH3

  • CH3CH2CH2CCH


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49.


50.

Which of the following compounds do not give different isomers on monochlorination?

  • Neo-pentane

  • n-butane

  • Iso-butane

  • Iso-pentane


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