In the Carius method of estimation of halogen,$0.15 \ g$ of an organic compound gave $0.12 \ g$ of $AgBr$. Find out the percentage of bromine in the compound.

Match Column-$I$ and Column-$II$ with the correct relation:

Column-$I$	Column-$II$
$(i).$ Magnesium pyrophosphate	$(a).$ $I_2O_5$
$(ii).$ Barium sulphate	$(b).$ $AgX$
$(iii).$ Iodide pentoxide	$(c).$ $Mg_2P_2O_7$
$(iv).$ Silver halide	$(d).$ $BaSO_4$

In the $Kjeldahl$ method,when an organic compound containing nitrogen is heated with concentrated $H_2SO_4$,nitrogen is converted into which of the following?

Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?

When $1 \ g$ of compound $(X)$ is subjected to Kjeldahl's method for the estimation of nitrogen,$15 \ mL$ of $1 \ M$ $H_2SO_4$ was neutralized by the ammonia evolved. The percentage of nitrogen in compound $(X)$ is:

In Carius method of estimation of halogens,$250 \ mg$ of an organic compound gave $141 \ mg$ of $AgBr$. The percentage of bromine in the compound is: