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In Duma's method for estimation of nitro...

In Duma's method for estimation of nitrogen. `0.25 g `of an organic compound gave `40mL` of nitrogen collected at `300K` temperature of `725 mm` pressure. If the aqueous tension at `300K` is `25 mm`, the percentage of nitrogen in the compound is

A

`15.76`

B

`16.76`

C

`17.36`

D

`18.20`

Text Solution

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The correct Answer is:
B
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In Dumas’ method for estimation of nitrogen, 0.3g of an organic compound gave 50mL of nitrogen collected at 300K temperature and 715mm pressure. Calculate the percentage composition of nitrogen in the compound. (Aqueous tension at 300K=15 mm)

In Dumas' method for estimation of nitrogen, 0.3 g of an organic compound released 50 mL of nitrgen gas collected under 715 mm Hg and at 300 K . If aqueous tension at 300 K is 15 mm Hg , calculate the percentage composition of nitrogen in the organic compound. Strategy: Step 1 . Calculate the volume of N_(2) gas at STP//NTP using combined gas equation. Step 2 . Find the munber of moles of N_(2) gas: n_(N_(2)) = ("Volume of "N_(2) "gas at" NTP)/(22400 mL mol^(-1)) Step 3 . Find the mass of N_(2) gas: m_(N_(2)) = n_(N_(2)) xx Molar mass of N_(2) Step 4 . Find the % of N_(2) gas % N = ("Mass of nitrogen")/("Mass of organic compound") xx 100% or use Eq. (13.7) where steps (2) to (4) are combined.

OP TANDON-CHARACTERISATION OF ORGANIC COMPOUNDS -OBJECTIVE QUESTIONS Level-A
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  2. In the estimation of carbon and hydrogen, if the substance also contai...

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  3. In Duma's method for estimation of nitrogen. 0.25 g of an organic comp...

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  4. 0.30g of an organic compound containing C, H, and O an combustion yiel...

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  5. In Carius method of estimation of halogens 250 mg of an organic compou...

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  6. In Dumas' method of estimation of nitrogen 0.35 g of an organic compou...

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  7. An organic compound 'A', containing C,H,N and O, on analysis gives 49....

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  8. An alkaloid contains 17.28% of nitrogen and its molecular mass is 162....

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  9. 1.2g of organic compound on kjeldahlization librates ammonia which con...

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  10. Which of the following reagents is used for the separation of acetalde...

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  11. In the estimation of sulphur by carius method, 0.468 gm of an organic ...

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  12. The ammonia evolved from the treatment of 0.30g of an organic compoun...

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  13. In the Kjeldahl's method for estimation of nitrogen present in a soil ...

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  14. An organic compound having molecular mass 60 is found to contain C = 2...

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  15. A compound containing only carbon, hydrogen and oxygen has molecular m...

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  16. 29.5 mg of an organic compound containing nitrogen was digested accord...

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  17. An aromatic hydrocarbon with empirical formula C(5)H(4) on sulphonatio...

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  18. When 20 g of naphthoic acid (C(11)H(8)O(2)) is dissolved in 50 g of be...

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  19. Sodium fusion extract, obtained from aniline, a treatment with iron (I...

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  20. Match the following: {:((A)"Duma's method",(i)AgNO(3)),((B)"Kjeldahl...

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