1.

CompoundsA (molecularformulaC_(3) H_(8) O) is treatedwith acidifiedpotassiumdichromate toforma product B( molecularformulaC_(3) H_(6) O) B.Formaa shiningsilvermirroron warmingwith ammonicalsilver nitrateB whentreatedwith aqueoussolutionof H_(2) NCONHNH_(2) HCI and sodiumacetategivesa product C. Identifythe structureof C.

Answer»

`CH_(3) CH_(2) CH- NNHCONH_(2)`
`CH_(3)- underset(CH_(3))underset(|)(C ) = NNHCONH_(2)`
`CH_(3) - underset(CH_(3)underset(|)(C ) =NCONHNH_(2)`
`CH_(3) CH_(2) CH= NCONHNH_(2)`

Solution :
Reactionof Bindicatesthat BIS analdehydethus Bshouldbe `C_(2) H_(5) CHO` or `CH_(3) CH_(2)CHO`and thereforeC shouldbe `CH_(3) CH_(2) CH=NNHCONH_(2)`
`CH_(3) CH_(2) CH_(2) OHoverset([O])(to) CH_(3) CH_(2)CHO`
`overset( "Silver mirror test ") (to)CH_(3) CH_(2) COOH+ 2 AG `
`CH_(3) CH_(2) CHO + H_(2) NNHCONH_(2)`
SEMICARBAZIDE
`to CH_(3) CH_(2) CH=NNHCONH_(2)`
semicarbazone [C]


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