Introduction of halogen conatining organic compounds

In Carius method, halogen containing organic compound is heated with funning nitric acid in the presence of:

Assertion (A) Appearance of blue or green colour in the name in Beilstein test indicates the presence of halogen in the given organic compound. Reason (R ) Certain compounds such as urea or thio urea respond to Beilstein test even in the absence of halogen.

The presence of halogen, in an organic compounds, is detected by

In Carcuc method for the estimation of halogens. 250 mg of organic compound gave 141 mg of AgBr . The percentage of bromine in the compound is :

Write the structure of the following organic halogen compounds: (i) p-Bromochlorobenzene (ii) 1-Chloro-4-ethylcyclohexane