A basic volatile nitrogen compound give a foul smelling gas when treated with chaloroform and alcoholic potash. A0.295 gm sample of the substance dissolved in aqueous HCl and treated withNaNO_2 solution at0^@C libreated a colourless , odorless gas whose volume corresponded to112 ml atSTP. After the evoltion fo the gas was complte , the aqueous solution was distilled to give an orgfanic liquid which did not coniain nitrogen and wihic on watemiing with alkali and iodine gave a uellow preciptitate , Idntify the orginal substance assuming that it contains one (N) atom per molecule .

A basic volatile nitrogen compound give a foul smelling gas when treat

1.	A basic volatile nitrogen compound give a foul smelling gas when treated with chaloroform and alcoholic potash. A0.295 gm sample of the substance dissolved in aqueous HCl and treated withNaNO_2 solution at0^@C libreated a colourless , odorless gas whose volume corresponded to112 ml atSTP. After the evoltion fo the gas was complte , the aqueous solution was distilled to give an orgfanic liquid which did not coniain nitrogen and wihic on watemiing with alkali and iodine gave a uellow preciptitate , Idntify the orginal substance assuming that it contains one (N) atom per molecule .
Answer» Solution :A basic , volatile nitrogen compound is primary amine . `NaNO_2 HCl overset(0^@C) (rarr) NaCl + HNO_2` ` UNDERSET ("It contains one (N) atom")(RNH_2+NHO_2) overset (0^@C)(rarr) R-underset (("Coloruless gas")) (OH +N_2 + N_2O)` At `STP 112 ml` of colorless gas is evolved with ` 0. 295 gm` sample of substance after treatment with aqueous `HCl` and ` NaNO_2` at ` 0^2C`. So ,a t ` STP 22400 ml` coloruless fas will be evolved with ` (0. 295 xx 2224000)/( 112) = 59 gm` of sample of such substance after above treatment . Hence , the MOLECULAR weith of ` RNH_2 ` is 59. `:.` Weightor ` R+ 14 +2 = 59` Weith of ` R= 43` So (R ), is ` C_3 H_7 - ( :. "Weigth of"C_3 H_7 -= 43)`. Thus , the GIVE substance is i. ii. . .