Which of the following compounds is obtained when gypsum is heated at 373 K?
CaSO4.(1/2H2O)
The correct answer is option 2 I.e. CaSO4 .(1/2H2O).
When gypsum (CaSO₄ · 2H₂O) is heated at 373 K (100°C), it loses water and forms calcium sulfate hemihydrate (CaSO₄ · ½H₂O), commonly known as Plaster of Paris.
Reaction: CaSO₄·2H₂O (gypsum) → CaSO₄·½H₂O (Plaster of Paris) + 1½H₂O (steam)
Similar Questions
Which of the following statements is correct according to the law of conservation of mass?
Which of the following is formed when carbon dioxide reacts with calcium hydroxide?
Which of the following types of reaction represents formation of slaked lime from calcium oxide and water?
What is used in the preparation of calcium sulphate hemihydrate?
What is used to remove permanent hardness of water?
- Which of the following statements is/are true or false?
Statements:
A) H$_2$SO$_4$ is used in the refining of petroleum to remove sulphur and other compounds.
B) The basic nature of Sodium Hydroxide (NaOH) is due to the presence of Hydrogen ions in the solution. - Which of the following salts is acidic in nature?
- The pH value increase from 7 to 14 represents a:
Which of the following is NOT an example of homogenoud mixture ?
For preparation of which of the following compounds is the chlor -alkali process used?
Important Questions from Acids, Bases & Salts
- Name the gas used in preparation of bleaching powder.
Which of the following statements is correct according to the law of conservation of mass?
Which of the following is formed when carbon dioxide reacts with calcium hydroxide?
Which of the following types of reaction represents formation of slaked lime from calcium oxide and water?
Which of the following has a pH value of 7?
