When a binary salt ofiron reactsw ith hydrochloric acid it gives out a gas which can be used for identification of many metal ions. Identify the salt, the gas and explain how it is usefill in detecting metal ions.

When a binary salt ofiron reactsw ith hydrochloric acid it gives out a

1.	When a binary salt ofiron reactsw ith hydrochloric acid it gives out a gas which can be used for identification of many metal ions. Identify the salt, the gas and explain how it is usefill in detecting metal ions.
Answer» Solution :Gas used for DETECTION of IONS Identification of the gas, Balanced chemical equation. (iv) Identification of binary salt from the balanced chemical equation. (V) Reactivity ofmetal ions with the gas. (VI) PRODUCTS OBTAINED Colour of the product found