1.

X_2 is a greenish yellow gas with an offensive smell used in water purification. It partially dissolves in water to give a solution which turns blue litmus red. When X_2 is passed through NaBr solution, Br_2 is obtained. Identify X_2.

Answer»

SOLUTION :`X_2` is chlorine which is a YELLOWISH green gas. It DISSOLVES in WATER forming HCl and HClO
`Cl_2+ H_2O to HCl + HClO`
HCl turns blue litmus to red .
`Cl_2 + 2NaBr to 2NaCl + Br_2`
`X_2` is chlorine


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