1.

Indentigy the set of reagents/reacatns conditins (X) and (Y) in the followingset of transforamtion: CH_(3) - CH_(2) - CH_(2) Br overset((Br))(rarr) underset(Br)underset(|)underset(CH_(3)-CH-CH_(3))underset(darr (Y))("Product")

Answer»

`(X)` = Dilute aqueosu`NaOH, 20^(@)C`
`(Y) = HBr//"acetic"` acid, `20^(@)C`
`(X)` = CONCENTRATED alcholic `NaOH, 80^(@)C`
`(Y) = HBr//"acetic"` acid, `20^(@)C`
`(X)` =Dilue aqueous`NaOH, 20^(@)C`
`(Y) = Br_(2)//CHCl_(3), 0^()c`
`(X)` = Concentrateed alcoholic `NaOH, 80^(@)C`
`(Y) = Br_(2)//CHCl_(3), 0^()c`

Solution :`RX overset(X)(rarr) "Alkene" overset(Y)(rarr) "Isomer of RX"`
For `X`, the conditions given are:
`{:(a,b,c,d),(Dil.aq.,CONC. Alcoholic,Dil.aq.,Conc. Alcoholic),(NaOH,NaOH,NaOH,NaOH),(20^@C,80^@C,20^@C,80^@):}`
So conditions (a) and (c) are same and not required becuase in aq. `NAOH. SN^(2)` reaction will OCCUR to give `ROH`.
[So condtions for `E2`ELIMINATION is conc. alcoholic
`NaOH` at `80^(@)C` (Conditions (b) and (d) are same.)]
For `Y` conditions given are:
`{:(a,b,c,d),(HBr//"acetic".,HBr//"acetic",Br_(2)//CHCl_(3),Br_(2)//CHCl_(3)),("acid","acid",,),(at20^@C,at20^@C,at0^@C,at0^@):}`
Conditions (c) and (d) are not required becuase they do not give the desiredproduct.
Only condition for `(Y)` is `(a)` or `(b)`
But for `(X)` is as in `(b)`, and conditionfor `(Y)` as in `(b)`.


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