ClCH2COOH is heated with fuming HNO3 in the presence of AgNO3 in Carius tube. After filtration and washing the precipitate obtained is:
AgNO3
AgCl
Ag2SO4
ClCH2COOAg
0.99 g of an organic compound containing halogen when heated with fuming HNO3 in presence of AgNO3 in a carius tube gave 0.287 g of white precipitate. The percentage of halogen is?