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Class 12 Tuition > Learn Unit 10-s -Block Elements (Alkali and Alkaline Earth Metals) > What is dead burnt plaster?
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What is dead burnt plaster?

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Learn Unit 10-s -Block Elements (Alkali and Alkaline Earth Metals) +1 Chemistry

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Ahead burnt plaster is defined as Plaster of paris CaSo4.½ H2O is heated above 393k, water of crystallization is lost and anhydrous calcium sulphate is left.
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Related Questions

Name the alkali metal which shows diagonal relationship with magnesium?

Alkali Metal LITHIUM shows diagonal relationship with Alkaline Earth Metal MAGNESIUM
Vibha
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State as to why
(a) Alkali metals show only +1 oxidation state. (b) Na and K impart colour to the flame but Mg does not.(c) Lithium on being heated in air mainly forms the monoxide and not the peroxide.(d) Li is the best reducing agent in aqueous solution.
a) There is only one valence electron in Alkali metals, on loosing one electron alkali metals achieve noble gas configuration which is most stable. Therefore, in order to achieve stability Alkali metals...
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Which of the following is used in photoelectric cells?
(a) Na (b) K (c) Li (d) Cs
Cs is used in the photoelectric cell due to the lowest ionization enthalpy among all alkali metals.
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Which one of the following alkaline earth metal carbonates is thermally most stable?
(a) MgCO3 (b) CaCO3 (c) SrCO3 (d) BaCO3
MgCO3 is most stable alkaline earth metal because it is present in first period.Due to this its nuclear charge is less as compare to other.Due to its less nuclear charge its bond length is small thus it is more stable.
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Which of the following is not a peroxide?
(a) KO2(b) CrO5(c) Na2O2 (d) BaO2
Correct answer is option (c). Because A peroxide is a compound containing oxygen oxygen single bond. The way you can identify it when it is in a compound is by using the valence electron of the partner...
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