Setting of plaster of paris involves

A Dehydration process
B Hydration to form other hydrates
C Oxidation process
D Reduction process

Correct Answer: Hydration to form other hydrates

The setting of plaster of Paris takes place by hydration due to the formation of a solid crystalline hydrate and hardening of Plaster of Paris is hydration reaction, which is reverse of the dehydration of gypsum. Plaster of Paris quickly sets to a hard mass when made into a thin paste with water. A slight expansion takes place in the process and heat is evolved. This process is exothermic.
Bissoy MCQ
#General Knowledge #Chemistry

Related Questions

The chemical name of 'Plaster of Paris' commonly used for setting broken bones is
A Calcium nitrate
B Calcium sulphate
C Calcium carbonate
D Calcium chloride
Setting of plaster of paris is accompanied with
A Hydration
B Dehydration
C Hydrolysis
D Loss of CO2
'Plaster of Paris' is made by partial dehydration of
A Epsom salt
B Gypsum salt
C Blue vitriol
D Green vitriol
What is plaster of paris made of?
A Limestone
B Quick lime
C Gypsum
D Hydrated lime
Plaster of Paris is obtained by calcining
A Bauxite
B Gypsum
C Lime stone
D None of these
What is the chemical formula of Plaster of Paris?
A CaSO4.H2O
B CaSO4.2H2O
C CaSO4
D CaSO4.$$\frac{1}{2}$$H2O
[Identify the most appropriate relationship between the two underlined sentences:] Paris is a city that has long been known as a center of artistic and cultural expression. Paris was home to many famous artists and writers from around the world. (What does the second sentence do?)
A It reinforces the first
B It states an effect
C It draws a conclusion
D It provides a contrast
'Plaster of peris' কোথায় ব্যবহৃত হয়
A হৃদরোগের চিকিৎসায়
B হাঁপানীর চিকিৎসা
C হাড়ভাঙ্গার চিকিৎসায়
D জায়রিয়ার চিকিৎসায়
The local swelling of a finished plaster, is termed
A Cracking
B Dubbing
C Blistering
D Hacking
(i)Participation involves more than the formal sharing of decisions. (ii)through anticipation , individuals . or organizations consider trends and make plans , shielding institutions from trauma of learning by shock. (iii) Innovative learning involves both anticipation and participation . (iv) It is an attitude characterized by cooperation. dialogue and empathy.
A (ii) + (iii) + (i) + (iv)
B (i) + (ii) + (iv) + (iii)
C (iv) + (i) + (iii) + (ii)
D (iii) + (ii) + (i) + (iv)

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