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 Multiple Choice QuestionsMultiple Choice Questions

131.

A mixture of benzaldehyde and formaldehyde when treated with 50% NaOH yields

  • sodium benzoate and sodium formate

  • sodium formate and benzyl alcohol

  • sodium benzoate and methyl alcohol

  • benzyl alcohol and methyl alcohol


132.

The correct order of reactivity of aldehydes and ketones towards hydrogen cyanide is

  • CH3COCH3 > CH3CHO > HCHO

  • CH3COCH3 > HCHO > CH3CHO

  • CH3CHO > CH3COCH3 > HCHO

  • HCHO > CH3CHO > CH3COCH3


133.

The acid, which contains both -OH and -COOH groups is

  • phthalic acid

  • adipic acid

  • glutaric acid

  • salicylic acid


134.

Butylated hydroxy anisole is a/an

  • antioxidant

  • cleansing agent

  • disinfectant

  • antihistamine


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135.

Nitration of which among the following compounds yields cyclonite?

  • Formaldehyde

  • Benzaldehyde

  • Urotropine

  • Acetaldehyde ammonia


136.

Aldehyde or ketones when treated with C6H- NH - NH2, the product formed is

  • semicarbazone

  • phenlhydrazone

  • hydrazone

  • oxime


137.

Which of the following in Baeyer's reagent?

  • Alkaline KMnO4

  • Acidic K2Cr2O7

  • Alkaline Na2Cr2O7

  • MnO2


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138.

The correct increasing order of the acidic strength of acids, butyric acid (I), 2-chlorobutyric acid (II), 3-chlorobutyric acid (III) and 2, 2-dichlorobutyric acid (IV) is 

  • I < II < III < IV

  • III < II < IV < I

  • I < III < II < IV

  • III < I < II < IV


C.

I < III < II < IV

Among the given list of acids, the acidic strength increases on-

(i) Presence of electron with drawing group (i.e. - I group)

(ii) Closeness of electron withdrawing group from the -COOH group.

(iii) Number of electron with drawing groups (i.e. -I group)

Hence, the correct order among the given options will be I < III < II < IV


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139.

The condensation reaction between one equivalent of acetone and two equivalents of benzaldehyde in presence of dilute alkali leads to the formation of

  • Benzalacetophenone

  • Benzylideneacetone

  • Dibenzylideneacetone

  • Benzoic acid and acetic acid


140.

Which one of the following involves nucleophilic addition?

  • Kolbe's reaction of phenol

  • Williamson synthesis of ethers

  • Aldol formation from ethanol

  • Reimer-Tiemann reaction of phenol


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