The elements with atomic numbers $9, 17, 35, 53, 85$ are all

Identify the products obtained when chlorine reacts with hot and concentrated $NaOH$.

Aqua regia is a mixture of

Which is used for sterilization of water in the water supply system of cities?

Which statement is correct about halogens?

When a mixture of solid $NaCl$ and solid $K_2Cr_2O_7$ is heated with concentrated $H_2SO_4$,orange-red vapours are obtained of the compound: