Bleaching powder and bleach solution are produced on a large scale and used in several house hold products. The effectiveness of bleach solution is often measured by iodometry.
In the following reactions sequence, the compound J is an intermediate.
$$J(C_9H_8O_2)$$ gives effervescence on treatment with $$NaHCO_3$$ and positive baeyer's test
For the following questions answer them individually