KCET · Chemistry · General Principles and Processes of Isolation of Metals
Select the correct statement :
- A Roasting involves heating the ore in the absence of air.
- B Calcination involves heating the ore above its melting point.
- C Smelting involves heating the ore with suitable reducing agent and flux below its melting point.
- D Calcination of calcium carbonate is endothermic.
Answer & Solution
Correct Answer
(D) Calcination of calcium carbonate is endothermic.
Step-by-step Solution
Detailed explanation
Among the given statements, correct statement is given in option (4). While statement given in options (1), (2) and (3) are incorrect.
Their correct form are as follows
- Roasting involves heating the ore is the regular supply of air.
- Calcination involves heating the ore below its melting point.
- Smelting is the process by which a metal is obtained at temperature beyond the melting
Their correct form are as follows
- Roasting involves heating the ore is the regular supply of air.
- Calcination involves heating the ore below its melting point.
- Smelting is the process by which a metal is obtained at temperature beyond the melting
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