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Q 2677056886.     (a) In the following equation
`A+2B+H_2O -> C+ 2D`
`(A = HNO_2 , B=H_2SO_3 , C=NH_2OH)`
Identify `D`. Draw the structures of `A, B,C` and `D`.
(b) In the contact process for industrial manufacture of sulphuric acid. some amount of sulphuric acid is used as a starting material.
Explain briefly. What is the catalyst used in the oxidation.
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)