Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

41.

The reagent in Friedel-Craft's reaction is :

  • pyridine

  • RCOCl

  • RCOOH

  • HCl


42.

Number of isomeric primary amines obtained from C4H11N are :

  • 3

  • 4

  • 5

  • 6


43.

In which of the following reactions carbon-carbon bond formation takes place ?

  • Cannizaro

  • Reimer - Tiemann

  • HVZ reaction

  • Schmidt reaction


44.

Which gives only mono - substituted product ?

  • o - dinitrobenzene

  • m - dinitrobenzene

  • p - dinitrobenzene

  • Nitrobenzene


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45.

Order of boiling point is :

  • HF > HI > HBr > HCl

  • HF > HBr > HI > HCl

  • HCl > HBr > HI > HF

  • HCl > HI > HBr > HF


46.

Order of hydrolysis for the following :

  • RCOCl

  • RCOOR

  • RCONH2

  • (RCO)2O


47.

If the enolate ion combines with carbonyl group of ester , we get :

  • aldol

  • α , β - unsaturated ester

  • β - keto aldehyde

  • acid


48.

Which of the following compounds will react with NaHCO3  solution to give sodium salt and carbon dioxide ?

  • Acetic acid

  • n - hexanol

  • Phenol

  • Both (b) and (c)


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49.

Which will give chiral molecule ?

  • CH3COCl LiAlH4

  • C2H5CHO H+/H2OCH3MgBr

  • (CH3)2CHC2H5 Cu

  • CH3-CH=C(CH3)2 Cl2


B.

C2H5CHO H+/H2OCH3MgBr

C2H5CHO + CH3MgBr  

Propionaldehyde give chiral molecule on reaction with Grignard reagent

In resulting product C* is an asymmetric carbon atom as all the four valencies are satisfied with four different atoms or groups .


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50.

Which is not a polymer?

  • Sucrose

  • Enzyme

  • Starch

  • Teflon


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