Solved Organic Chemistry Problems PDF

### Solved Problems #### Based on Estimation of C and H - Example 8.31. An organic compound contains 69% C and 4.8% hydrogen the remainder being oxygen. Calculate the masses of carbon dioxide and water formed by the complete combustion of 0.20 g of the substance. ### Based on Kjeldahl's Method - E...

### Solved Problems #### Based on Estimation of C and H - Example 8.31. An organic compound contains 69% C and 4.8% hydrogen the remainder being oxygen. Calculate the masses of carbon dioxide and water formed by the complete combustion of 0.20 g of the substance. ### Based on Kjeldahl's Method - Example 8.34. 0.50 g of an organic substance was Kjeldahlised and the ammonia obtained was passed into 100 cm³ of M/10-H2SO4. The excess of acid required 154 cm³ of M/10-NaOH of neutralisation. Calculate the percentage of nitrogen in the compound. ### Based on Dumas' Method - Example 8.33. 0.25 g of an organic compound gave 30 cm³ of moist dinitrogen at 288 K and 745 mm pressure. Calculate the percentage of nitrogen. (Aq tension at 288 K = 8.7 mm). ### Example Problems - Example 8.35. During nitrogen estimation in an organic compound by Kjeldahl's method, the ammonia evolved from 0.5 g of the compound neutralized 10 mL of 1 M H2SO4. What is the % of N in the organic compound? - Example 8.37. (i) In sulphur estimation, 0.157 g of organic compound gave 0.4813 g of BaSO4. What is the percentage of sulphur in organic compound? (NCERT Textbook Solved Problem) (ii) 0.092 g of organic compound on heating in carius tube and subsequent ignition gave 0.111 g of Mg2P2O7. Calculate the percentage of phosphorus in organic compound. - Example 8.32. 0.246 g of an organic acid gave on combustion 0.198 g of carbon dioxide and 0.1014 g of water vapours. Calculate the percentage of C and H. - Example 8.36. 0.40 g of an organic compound gave 0.3 g of silver bromide by Carius method. Find the percentage of bromine in the compound.