Which of the following attacks glass?

The hydrolysis products of the $BrF_5$ molecule are given by the reaction: $BrF_5 + 3H_2O \rightarrow HBrO_3 + 5HF$. What are the products of this reaction?

Which of the following halogens has the highest bond dissociation energy?

$A$ mixture of concentrated $HCl$ and $HNO_3$ in a $3:1$ ratio contains ..........

$POCl_3$ is prepared by the reaction of:
$(I)$ $P_4 + SO_2Cl_2 \to$
$(II)$ $P_4 + SOCl_2 \to$
$(III)$ $PCl_5 + SO_2 \to$
$(IV)$ $PCl_5 + C_2H_5OH \to$

The bleaching action of bleaching powder is due to the formation of