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 Multiple Choice QuestionsMultiple Choice Questions

231.

Which of the following reacts with phenol to give salicylaldehyde after hydrolysis?

  • Dichloro methane

  • Trichloro methane

  • Methyl chloride

  • None of these


232.

The reaction CH3CH2ONa + BrCH2CH3 -NaBr CH3CH2OCH2CH3 is called

  • Frankland reaction

  • Wurtz reaction

  • Williamson's synthesis

  • Cannizaro's reaction


233.

Schiff's reagent is

  • p-rosaniline hydrochloride solution decolourised with sulphurous acid

  • magenta solution decolourised with Cl2

  • ammoniacal silver nitrate solution

  • alkaline KMnO4 solution


234.

Reduction of acetyl chloride with H2 in presence of Pd gives

  • CH3COCH3

  • C2H5OH

  • CH3COOH

  • CH3CHO


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235.

In which of the following compounds carboxylic group (-COOH) is not present?

  • Acetic acid

  • Lactic acid

  • Benzoic acid

  • Picric acid


236.

When calcium acetate mixed with calcium formate is distilled, which of the following is not obtained?

  • Acetone

  • Formaldehyde

  • Acetaldehyde

  • Propionaldehyde


237.

Glucose response to silver mirror test due to the presence of

  • -COOH group

  • an alkaline group

  • a ketonic group

  • an aldehydic group


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238.

The reaction of benzaldehyde with alkali gives

  • phenol+ sodium benzoate

  • benzene + benzyl alcohol

  • benzyl alcohol + sodium benzoate

  • phenol+ benzene


C.

benzyl alcohol + sodium benzoate

Aldehydes which do not contain an α-hydrogen atom, treated with concentrated alkali solution to give alcohol and salt of carboxylic acid is called Cannizaro reaction. Example - Benzaldehyde reacts with alkali (NaOH) to give benzyl alcohol and sodium benzoate.


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239.

Positive Fehling test is shown by

  • acetaldehyde

  • acetone

  • benzaldehyde

  • acetophenone


240.

Reduction of an aldehyde gives

  • primary alcohol

  • monocarboxylic acid

  • secondary alcohol

  • tertiary alcohol


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