In the hardening stage of Plaster of Paris, the compound formed is:
- A$CaSO_4$
- B$Orthorhombic \ CaSO_4 \cdot 2H_2O$
- C$CaSO_4 \cdot H_2O$
- D$Monoclinic \ CaSO_4 \cdot 2H_2O$
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Which of the following is an amphoteric hydroxide?
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Identify the correct statements from the following.
$(A)$ $BeSO_4$ is soluble in water.
$(B)$ $BeO$ is an amphoteric oxide.
$(C)$ $CO$ can be obtained by heating $CaCO_3$ at $1070-1270 \ K$.
$(A)$ $BeSO_4$ is soluble in water.
$(B)$ $BeO$ is an amphoteric oxide.
$(C)$ $CO$ can be obtained by heating $CaCO_3$ at $1070-1270 \ K$.
$CaCO_3$ $\xrightarrow[excess \ H_2O]{CO_2 \ in} A$ $\xrightarrow{\Delta} B$
Identify $A$ and $B$.
Identify $A$ and $B$.
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