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 Multiple Choice QuestionsMultiple Choice Questions

221.

Which of the following is produced when acetylene is passed in dilute H2SO4 in the presence of HgSO4?

  • C2H5OH

  • CH3COCH3

  • CH3CHO

  • Mercury carbide


222.

Dehydration of glycerol gives

  • propane

  • propene

  • acrolein

  • benzene


223.

The acid present in vinegar is

  • CH3COOH

  • H2SO4

  • HCl

  • HNO3


224.

Which one of the following reagents can distinguish between an aldehyde and a ketone?

  • Fehling's solution

  • H2SO4 solution 

  • NaHSO4

  • NH3


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225.

Dry distillation of the mixture of calcium formate and calcium acetate gives

  • acetone

  • acetaldehyde

  • formaldehyde

  • formic acid


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226.

The general formula (RCO)2O represents

  • a ketone

  • an ether

  • an acid anhydride

  • an ester


C.

an acid anhydride

Elimination of one mole H2O from two moles of carboxylic acid gives an acid anhydride.

R-COOH + HO-CO-R -H2OP2O5  R-CO-O-CO-R


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227.

Reaction of dry HCl with acetone gives

  • aldol

  • chloritone

  • isopropyl alcohol

  • None of the above


228.

Trioxane has the formula , it is prepared from

  • formaldehyde

  • methanol

  • dichloromethane

  • vinyl alcohol


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229.

When methyl cyanide is hydrolysed in presence of alkali, the product is

  • acetamide

  • methane

  • CO2 + H2O

  • acetic acid


230.

The IUPAC name of crototonaldehyde is

  • prop-2-en-1-al

  • propenal

  • but-2-en-1-al

  • butenal


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