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In Carius tube the compound ClCH(2)-COOH...

In Carius tube the compound `ClCH_(2)-COOH ` was heated with fuming ` HNO_(3) " and " AgNO_(3)`.After filtration and washing,a white ppt.was formed
The ppt. is

A

AgCl

B

`AgNO_(3)`

C

`Ag_(2)SO_(4)`

D

`CH_(2)(Cl)COOAg`

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The correct Answer is:
A
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In Carius tube, the compound ClCH_(2)COOH was heated with fuming HNO_(3) and AgNO_(3) . After filtration and washing, a white precipitate was formed. The precipitate is of

Estimation of halogens: Carius method: A known mass of compound is heated with conc. HNO_(3) in the pressure of AgNO_(3) contained in a hard glass tube known as Carius tube in a furance . C and H are oxidised to CO_(2) and H_(2)O . The halogen forms the corresponding AgX. It si filtered m dried and weighted . Extimation of sulphur: A known mass of compound is heated with fuming HNO_(3) or sodium peroxide (Na_(2)O_(2)) in the presence of BaCl_(2) solution in Carius tube. Sulphur is oxidised to H_(2)SO_(4) and percipipated as BaSO_(4) .It is filtered , dried and weighed. Percentage of S =("Atomic mass of S")/("Molecular mas of" BaSO_(4)) xx ("Mass of" BaSO_(4) xx 100)/("Mass of compound") 0.15 gm of an organic compound gave 0.12 gm of silver bromide by the Carius method. Find the percentage of bromine in the compound.

Estimation of halogens: Carius method: A known mass of compound is heated with conc. HNO_(3) in the pressure of AgNO_(3) contained in a hard glass tube known as Carius tube in a furance . C and H are oxidised to CO_(2) and H_(2)O . The halogen forms the corresponding AgX. It si filtered m dried and weighted . Extimation of sulphur: A known mass of compound is heated with fuming HNO_(3) or sodium peroxide (Na_(2)O_(2)) in the presence of BaCl_(2) solution in Carius tube. Sulphur is oxidised to H_(2)SO_(4) and percipipated as BaSO_(4) .It is filtered , dried and weighed. Percentage of S =("Atomic mass of S")/("Molecular mas of" BaSO_(4)) xx ("Mass of" BaSO_(4) xx 100)/("Mass of compound") 0.2595 gm of an organic substance when treated by Carius method gave 0.35 gm of BaSo_(4) . Calculate the percentage of sulphur in the compound.

DINESH PUBLICATION-PURIFICATION & CHARACTERISATION OF ORGANIC COMPOUND -Revision Q.F.Competitive exams
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  2. Anthracene is purified by

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  3. In Carius tube the compound ClCH(2)-COOH was heated with fuming HNO...

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  5. If on adding FeCl(3) solution to acidified Lassaigne solution ,a blood...

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  6. If 0.32 g of an organic compound containing sulphur produces 0.233 g o...

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  7. 0.2 g of an organic compound on comptete combustion produces 0.18 g of...

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  9. Distillation is used to separate liquids which differ in their b.pt by

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  10. Impure glycerine is purified by

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  11. Absolute alcohol is prepared by

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  12. Duma's method involves the determination of content of nitrogen in the...

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  13. A dibasic acid containing C,H and O was found to contain C=26.7% and H...

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  14. Leibing method is used for the estimation of

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  15. In Lassaigne's test for nitrogen,the blue colour is due to the formati...

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  16. Nitrogen in an organic compound can be estimated by

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  17. Distillation is used to separate liquids which differ in their boiling...

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  18. Which of the following organic compounds contains about 52 % carbon ?

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  19. The purity of an organic compound is determined by

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  20. During Lassaigne's test N and S present in an organic compound changes...

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