Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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51.

Aniline with CHCl3 and KOH on heating gives :

  • isocyanide

  • cyanide

  • phenol

  • salicylic acid


A.

isocyanide

Aniline reacts with CHCl3 and KOH as follows ;

C6H5NH2Aniline + CHCl3 + 3KOH(alc.)  C6H5N=CPhenyl isocyanide + 3KCl + 3H2O


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52.

Most acidic is :


53.

PCl X alc. KOH Y conc. H2SO4 Z

Here Z is :

  • CH3-CH2-CH2-OH

  • (CH3)2-C-OH

  • CH3-CH(OH)-CH3

  • none of above


54.

Compound reacting with alkaline KMnO4 :

  • (CH3)3-C-OH

  • (CH3)2-CH-OH

  • (CH3)3-C-CH2OH

  • none of the above


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55.

Lucas reagent reacts fastest with :

  • butanol - 1

  • butanol - 2

  • 2 - methyl - propanol - 2

  • 2 - methyl - propanol - 1


56.

SN2 mechanism is involed in the following substitution :

  • CH3-CH2-Cl + OH-

  • (CH3)2-C(Cl)-CH3-OH-

  • (CH3)2-C-Cl + OH-

  • CH3-CH2-(CH3)C(Cl)-CH3 + OH-


57.

Phenol and benzoic acid may be distinguished by :

  • NaHCO3

  • NaOH

  • Na

  • PCl5


58.

Correct order of basic nature is :

  • NH3 > CH3NH2 > C6H5NH2

  • C6H5NH> NH3 > CH3NH2

  • CH3NH> NH3 > C6H5NH2

  • none of the above


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59.

HCHO reacts with NH3 togive :

  • urotropine

  • bakelite

  • teryline

  • gylaptal


60.

Arrange the hydra - acids of halogens in increasing order of acidity .

  • HF < HCl < HBr < HI

  • HI < HBr < HCl < HF

  • HF < HBr < HI <HCl

  • HF < HI < HBr < HCl


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