1.

Estimation of halogens: CarisuMethod: A known mass of compound is heated with conc. HNO_(3) in the presence of AgNO_(3) contained in a hard glass tube known as carius tube in a furnce. C and H are oxidised to CO_(2) and H_(2)O . The halogen forms the corresponding AgX. It is filtered , dried , and weighed. Estimation 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 precipitated as BaSO_(4) . It is filerted, dried and weighed. 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. (Ag=108, Br=80)

Answer»

`34.0`
`46.0`
`80.0`
`50.0`

ANSWER :A


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