Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

CH3COOH LiAlH4 X 300°CCu Y NaOHDilute Z

In the above reaction Z is

  • Butanol

  • Aldol

  • Ketol

  • Acetal


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52.

The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with

  • PCl3

  • PCl5

  • SOCl2 in presence of pyridine

  • dry HCl in the presence of anhydrous ZnCl2


C.

SOCl2 in presence of pyridine

The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with SOCl2in the presence of pyridine.

ROH + SOCl2 → RCl + HCl + SO2

The other products being gases escape leaving behing pure alkyl halide.


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53.

The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is

  • methanal

  • propanal

  • propanone

  • ethanal


54.

The reaction involved in the oil of winter green test is salicylic acid conc. H2SO4 product. The product is treated with Na2CO3 solution. The missing reagent in the above reaction is

  • phenol

  • NaOH

  • ethanol

  • methanol


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55.

The compound which forms acetaldehyde when heated with dilute NaOH, is

  • 1, 1-dichloroethane

  • 1, 1, 1-trichloroethane

  • 1-chloroethane

  • 1, 2-dichloroethane


56.

Arrange the following in the increasing order of their basic strengths CH3NH2, (CH3)2NH, (CH3)N, NH3

  • NH3 < (CH3)N < (CH3)2NH < CH3NH2

  • NH3 <  (CH3)N < CH3NH< (CH3)2NH

  • (CH3)N < NH< CH3NH< (CH3)2NH

  • CH3NH< (CH3)2NH < (CH3)N < NH3


57.

A diabetic person carries a packet of glucose with him always, because

  • glucose reduces the blood sugar level slowly

  • glucose increases the blood sugar level slowly

  • glucose reduces the blood sugar level

  • glucose increases the blood sugar level almost instantaneously


58.

There are 20 naturally occurring amino acids. The maximum number of tripeptides that can be obtained is

  • 8000

  • 6470

  • 7465

  • 5360


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59.

Lucas test is associated with

  • aldehydes

  • phenols

  • carboxylic acids

  • alcohols


60.

The condensation polymer among the following is

  • rubber

  • protein

  • PVC

  • polythene


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