Which of the following salts does not contain any water of crystallisation?Only one correct answerA.Baking sodaB.Washing sodaC.GypsumD.Plaster of paris
Question
Which of the following salts does not contain any water of crystallisation?Only one correct answerA.Baking sodaB.Washing sodaC.GypsumD.Plaster of paris
Solution
The correct answer is A. Baking soda. Baking soda, also known as sodium bicarbonate (NaHCO3), does not contain any water of crystallisation. On the other hand, washing soda (sodium carbonate decahydrate, Na2CO3.10H2O), gypsum (calcium sulfate dihydrate, CaSO4.2H2O), and plaster of paris (calcium sulfate hemihydrate, CaSO4.0.5H2O) all contain water of crystallisation.
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