Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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51.

R-X Reagent R-NO3 , for the completion of the reaction suitable reagent is :

  • NO2

  • NaNO2

  • AgNO2

  • NaNO2 + dil. HCl


C.

AgNO2

R-X + AgNO2  RNO2 + NaX

Note When NaNO2 is used , the major product is RONO or R-ON=O


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52.

The use of CCl4 as fire extinguisher depends on the fact that :

  • it is an inorganic compound

  • it is an organic compound

  • its vapour is much heavier than air and non-combustible

  • it is a compound of chlorine


53.

Ether on carbonylation gives :

  • alkanoic acid

  • alkanone

  • alkyl alkanoate

  • alkanal


54.

CH3CHO + CH3CHO Dil OH- CH3CH(OH)CH2CHO , the intermediate in the above reaction is :

  • carbanion

  • carbonium ion

  • carbene

  • None of these


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55.

Ethanol shows intermolecular H-bonding .Which of the following property is affected by H-bonding ?

  • Volatility

  • Boiling point

  • Solubility

  • All of these


56.

How many α-hydrogens are diethyl ether ?

  • 10

  • 6

  • 4

  • 2


57.

Which one of the following types of drugs reduces fever ?

  • Tranquiliser

  • Antibiotic

  • Antipyretic

  • Analgesic


58.

Which of the following is a polyamide ?

  • Bakelite

  • Terylene

  • Nylon - 66

  • Teflon


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59.

Tertiary alkyl halides are practically inert towards substitution by SN2 mechanism because of :

  • steric hindrance

  • inductive effect

  • instability

  • insolubility


60.

Select the statement which is not true ?

  • Nylon fibres are elastic .

  • Nylon fibres are not crease resistant .

  • Nylon fibres are used in parachute .

  • Both (b) and (c) .


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