Identify X and Y in the following reactions- from Chemistry Halo

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 Multiple Choice QuestionsMultiple Choice Questions

111.

Assertion (A) : Cyclohexane is the most stable cycloalkane.

Reason (R) : Cyclopropane and cyclobutane are less stable due to angle starin and torsional strain.

The correct answer is-

  • Both (A) and (R) are true but (R) is not the correct explanation of (A).

  • (A) is true but (R) is not true.

  • (A) is not true but (R) is true.

  • Both (A) and (R) are true and (R) is the correct explanation of (A).


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112.

Identify X and Y in the following reactions-


C.

i. On reduction in neutral media, using Zn dust and NH4Cl solution nitrobenzene gives phenyl hydroxylamine.

ii. While in alkaline medium, using Zn-NaOH, mononuclear intermediate products (nitrobenzene and phenylhydroxyl amine) interact to each other to give dinuclear product. Final product using Zn-NaOH is hydrazobenzene, which in a formed viz the
formation of azoxybenzene and azobenzene.


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113.

This reaction is known as

  • Wurtz-Fittig reaction

  • Wurtz reaction

  • Fittig reaction

  • Friedel-Crafts reaction


114.

Which one of the following is more reactive towards SN2 reaction ?

  • (CH3)3CX

  • (CH3)2CHX

  • CH3CH2X

  • CH3X


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115.

The reaction between an alkyl halide and sodium metal in dry ether is called

  • Clemmensen reduction

  • Kolbe's reaction

  • Wurtz 's reaction

  • Cannizaro's reaction


116.

DDT is related to

  • insecticide

  • fungicide

  • chlorination

  • florination


117.

Which one of the following notations shows product incorrectly?

  • Cm96242 (α, 2n) Bk97243

  • B510 (α, n) N713

  • N714 (n, p) C614

  • Si1428 (d, n) P1529


118.

Carbon-halogen bond is strongest among the following

  • CH3Cl

  • CH3Br

  • CH3F

  • CH3I


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119.

In which of the following compounds, the chlorine atom is most easily substituted?

  • Chlorobenzene 

  • Vinyl chloride

  • Allyl chloride

  • p-chlorotoluene


120.

Most stable ion is

  • C6H5CH2+

  • (CH3)3-C+

  • (CH3)2CH+

  • CH3CH2+


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