MCQ
Calcium oxide is prepared by heating :
- A$\ce{CaCO_3}$ in Castner$-$Kellner cell.
- ✓$\ce{CaCO_3}$ in rotary kiln.
- C$\ce{Ca(HCO_3)_2}$ in rotary kiln.
- D$\ce{Ca(HCO_3)_2}$ in Castner$-$Kellner cell.
✓
Answer
Correct option: B.
$\ce{CaCO_3}$ in rotary kiln.
Calcium oxide is prepared on a commercial scale by heating $\ce{CaCO_3}$ in a rotary kiln at $1070$ to $1270K.$
$\text{CaCO}_3\xrightarrow[1070-1270^\circ\text{C}]{ \ \ \ \ \text{Heat} \ \ \ \ }\text{CaO}+\text{CO}_2$
$\text{CaCO}_3\xrightarrow[1070-1270^\circ\text{C}]{ \ \ \ \ \text{Heat} \ \ \ \ }\text{CaO}+\text{CO}_2$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Match List$-I$ with List$-II$
→| List$-I$ | List$-II$ |
| $(A)$ Spontaneous process | $(I)\,\Delta H < 0$ |
| $(B)$ Process with $\Delta P =0 \;\Delta T =0$ | $(II)\,\Delta G _{ T , P } < 0$ |
| $(C)\,\Delta H _{reaction}$ | $(III)$ Isothermal and isobaric process |
| $(D)$ Exothermic process | $(IV)$ [Bond energies of molecules in reactants] - [Bond energies of product molecules] |
Choose the correct answer from the options given below:
Which has the least bond angle
The correct order of boiling point is
According to the kinetic theory of gases, in an ideal gas, between two successive collisions, a gas molecule travels :
The following data are obtained when dinitrogen and dioxygen react together to form different compounds
→| Mass of dinitrogen | Mass of dioxygen |
| $14\, g$ | $16\, g$ |
| $14\, g$ | $32\, g$ |
| $28\, g$ | $32\, g$ |
| $28\, g$ | $80\, g$ |
Which law of chemical combination is obeyed by the above experimental data ?
Milk of magnesia used as a medicine for treating indigestion is a substance that $-$
→For the reaction, $X_2O_{4(l)} \to 2XO_{2(g)}$
→$\Delta U = 2.1\ kcal, \, \Delta S = 20\, cal\, K^{-1}$ at $300\, K$ Hence, $\Delta G$ is ............ $\mathrm{kcal}$
In which of the following compounds, the $C-Cl$ bond ionisation shall give most stable carbonium ion?
→Predict the product $(A)$ of the following reaction
→For the given compound $X$, the total number of optically active stereoisomers is. . . . . . .
→