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The ammonia evolved from the treatment of 0.03 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The axcess of the acid required 20 mL of 0,5 M solution hydroxide solution for complete neutralisation. the organic compound is :A. acetamideB. benzamideC. ureaD. thiourea. |
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Answer» Correct Answer - C Volume of unused `H_(2)SO_(4)` `{:(N_(1)V_(1),equiv,N_(2)V_(2)),("(acid)",,"(base)"):}` `0.2xxV_(1)=0.5xx20` `V_(1)=(0.5xx2.0)/(0.2)=50 mL` (b) Volume of `H_(2)SO_(4)` used `=100-50=50 mL` `%` of nitrogen in the compound `=(1.4xxVxxN)/(W)` `=(1.4xx50xx0.2)/(6.30)=46.60 %` The percentage of nitrogen is the same as in urea `(NH_(2)CONH_(2))` `=("Mass of N")/("Mass of Urea")xx100` `=28/60xx10=46.6 %` |
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