pBlock ElementsII - Result Question 83
####78. The Haber’s process can be represented by the following scheme.
Identify $A, B, C, D$ and $E$.
$(1999,5 M)$
79 (a) In the following equation
$$ \begin{aligned} & \qquad A+2 B+H _2 O \longrightarrow C+2 D \ & \left(A=HNO _2, B=H _2 SO _3, C=NH _2 OH\right) \ & \text { Identify } D \text {. Draw the structures of } A, B, C \text { and } D \text {. } \end{aligned} $$
(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 of $SO _2$ ?
(1999, 10M)
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Solution:
- In given scheme : $A=Ca(OH) _2$
$B=NH _4 HCO _3, C=Na _2 CO _3$
$D=NH _4 Cl$ and $E=CaCl _2$
