Home » mcq » chemistry » ‘Plaster of Paris’ is made by partial dehydration of A. Epsom salt B. Gypsum salt C. Blue vitriol D. Green vitriol
Epsom salt
Gypsum salt
Blue vitriol
Green vitriol
Answer is Wrong!
Answer is Right!
The correct answer is B. Gypsum salt.
Plaster of Paris is a white powder
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that is made by heating gypsum to 120â130 °C. This process drives off water molecules from the gypsum, leaving behind a calcium sulfate hemihydrate powder. When water is added to plaster of Paris, it rehydrates to form gypsum again. This process is reversible, and can be repeated multiple times.
Epsom salt is a naturally occurring mineral that is composed of magnesium sulfate. It is often used as a laxative, and is also found in some bath salts.
Blue vitriol is a common name for copper sulfate. It is a blue crystalline solid that is used in a variety of applications, including as a fungicide, wood preservative, and in the production of other chemicals.
Green vitriol is a common name for ferrous sulfate. It is a green crystalline solid that is used in a variety of applications, including as a mordant in dyeing, in the production of other chemicals, and as a fertilizer.
In conclusion, the correct answer is B. Gypsum salt.