Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

RCON3heatRNCOH2ORNH2This reaction is known as:

  • Schmidt reaction

  • Wurtz reaction

  • Curtius reaction

  • Gabriel phthalimide reaction


52.

Indicate correct synthesis of carboxylic acid from organometallic compound :

  • All of the above


53.

Consider the following compounds:

Correct order of the basic nature of the above compounds:

 

  • I<II<III<IV

  • IV<II<III<I

  • I<III<IV<II

  • II<IV<III<I


54.

When addition polymerisation of ethene takes place in a hydrocarbon solvent in the presence of ziegler-Natta catalyst, it forms:

  • LDP

  • HDP

  • Polyacrylnitrile

  • Teflon


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55.

Amyl meta cresol (5-methyl-2-phentyl phenol) is an:

  • antiseptic

  • antibiotic

  • antimicrobial

  • antacid


56.

In the following reduction, reducing agent used is:

  • DIBAH

  • LiAlH4

  • NaAlH4

  • H2/PdBaSo4


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57.

The correct order of reactivity of phenyl Magnesium bromide with the following compound is:

  • (II)> (III)> (I)

  • (I)> (III)> (II)

  • (II)> (I)> (III)

  • (I)> (II)> (III)


C.

(II)> (I)> (III)

Among aldehyde and a ketone, aldehydes are more electrophilic as in ketones. If charge on carbonyl carbon is decreased by +I effect of both alkyl groups.

Moreover in the tetrahedral intermediate aldehydes have less steric repulsion than ketone and aldehydes increases the--ve charge on oxygen less in comparison to ketmes.

Based on the above the order of reactivity is:

(II) > (I) > (III)


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58.

Predict the product Bin the given reaction:


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59.

Under basic condition which one suffers elimination the most?

  • (CH3)3CCI

  • (CH3)2CHCH2CI

  • CH3CH2CHCICH3

  • CH3CH2CH2CH2CI


60.

The correct order of basicity of:

  • A> B > C > D

  • D > C>A> B

  • B > D > C > A

  • D>A> B > C


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