An inorganic compound `(X)` shows the following reactions :  (a) It is white solid, exists as dimer
Channel: Doubtnut
Date: 2020-07-26

An inorganic compound `(X)` shows the following reactions :  (a) It is white solid, exists as dimer and fumes in moist air.  (b) It sublimes at `180^@ C` and forms monomer on heating to `400^@ C`.  ( c) Its aqueous solution turns blue litmus red and gives a white precipitate with `AgNO_(3)` solution which is soluble in excess of `NH_(4) OH`.  (d) Addition of `NaOH` to the solution of `(A)` gives a white gelatinous precipitate which is, however, soluble on excess of `NaOH`.  Identify the compound `(A)`.