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Consider two chemical reactions $(A)$ and $(B)$ that take place during metallurgical process:
$(A)$ $\mathrm{ZnCO}_{3(\mathrm{~s})} \longrightarrow \mathrm{A}{\longrightarrow} \mathrm{ZnO}_{(\mathrm{s})}+\mathrm{CO}_{2(\mathrm{~g})}$
$(B)$ $2 \mathrm{ZnS}_{(\mathrm{s})}+3 \mathrm{O}_{2(\mathrm{~g})} \longrightarrow \mathrm{ZnO}_{(\mathrm{s})}+2 \mathrm{SO}_{2(\mathrm{~g})}$
The correct option of names given to them respectively is:
$(A)$ is calcination and $(B)$ is roasting
$(A)$ is roasting and $(B)$ is calcination
Both $(A)$ and $(B)$ are producing same product so both are calcination
Both $(A)$ and $(B)$ are producing same product so both are roasting
Solution
$(A)$ $\mathrm{ZnCO}_{3}(\mathrm{~S}) \stackrel{\Delta}{\longrightarrow} \mathrm{ZnO}(\mathrm{s})+\mathrm{CO}_{2}(\mathrm{~g})$
Heating in absence of oxygen in calcination.
$(B)$ $2 \mathrm{ZNs}(\mathrm{s})+3 \mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{ZnO}(\mathrm{g})+2 \mathrm{SO}_{2}(\mathrm{~g})$
heating in presence of oxygen in roasting
Hence $(A)$ is calcination while $(B)$ in roasting
Similar Questions
Match List$-I$ and List$-II :$
| List$-I$ | List$-II $ | ||
| $(a)$ | Haematite |
$(i)$ |
$Al _{2} O _{3} \cdot xH _{2} O$ |
| $(b)$ | Bauxite | $(ii)$ |
$Fe _{2} O _{3}$ |
| $(c)$ | Magnetite | $(iii)$ | $CuCO _{3} \cdot Cu ( OH )_{2}$ |
| $(d)$ | Malachite | $(iv)$ | $Fe _{3} O _{4}$ |
Choose the correct answer from the options given below :
