When an aromatic amine A was treated with alcoholic potash and another compound Y, a foul-smelling gas was formed with formula C6H5NC. Y was formed by reacting a compound Z with Cl2 in presence of slaked lime. The compound Z is:
A
C6H5NH2
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B
CH3OH
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C
CH3CH2OH
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D
CHCl3
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Solution
The correct option is CCH3CH2OH In Hoffmann's carbylamine test (also known as Isocyanide test), aliphatic or aromatic primary amine (A) is heated with chloroform (compound Y) in presence of alcoholic potassium hydroxide to give foul smelling alkyl/aryl isocyanide or carbylamine. Compound Y (chloroform) is obtained by reaction of compound Z(CH3CH2OH) with chlorine in presence of slaked lime. C6H5−NH2A+CHCl3+3KOHheat−−→C6H5−NC+3KCl+3H2O CH3CH2OHZ+3Cl2→CCl3CHO+3HCl 2CCl3CHO+Ca(OH)2→2CHCl3Y+(HCOO)2Ca