The chemical formula of Plaster of Paris is:
1.
2.
3.
4. 3CaSO4.H2O
The incorrect equation for Solvay process is -
1.
2.
3.
4. None of the above.
Potassium carbonate cannot be prepared by the Solvay process because -
1. | Potassium carbonate is insoluble in water and does not precipitate out. |
2. | Potassium carbonate is soluble in water and does not precipitate out. |
3. | Potassium carbonate is soluble in water and does precipitate out. |
4. | Potassium carbonate is insoluble in water and does precipitate out. |
The incorrect reaction among the following is:
1. | Na2O2(s) + 2H2O(l) → 2NaOH(aq) + H2O2(g) |
2. | 2KO2(s) + 2H2O(l) → 2KOH(aq) + H2O2(aq) + O2(g) |
3. | Na2O(s) + CO2(g) → NaHCO3 (s) + H2O2(aq) |
4. | Na2O(s) + CO2(g) → Na2CO3 (s) |
Quick lime is heated with silica to give:
1. CaSiO3
2. CaSiO4
3. CaSiO
4. Ca(SiO)3
The correct statement(s) among the following options is/are:
1. | Sodium metal reacts violently with water. |
2. | Sodium metal is heated in a free supply of air to give sodium peroxide. |
3. | Sodium peroxide is dissolved in water to give sodium hydroxide. |
4. | All of the above. |