$A$ hydrated colorless solid $(A)$ is water soluble and finds use in medicine as a purgative. When a solution of $(A)$ is treated with ammonium phosphate,a white precipitate is formed. $(A)$ gives a pink mass in the cobalt nitrate cavity test. What is $(A)$?
- A$FeSO_{4} \cdot 7H_{2}O$
- B$Na_{2}SO_{4} \cdot 10H_{2}O$
- C$MgSO_{4} \cdot 7H_{2}O$
- D$CaSO_{4} \cdot 2H_{2}O$
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An element has an atomic number of $56$. To which of the following categories does it belong?
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$I$. Beryllium oxide is amphoteric in nature.
$II$. Beryllium hydride is formed by the reaction of beryllium with hydrogen.
$III$. Beryllium hydride is formed by the reaction of beryllium chloride with lithium aluminium hydride.
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$I$. Beryllium oxide is amphoteric in nature.
$II$. Beryllium hydride is formed by the reaction of beryllium with hydrogen.
$III$. Beryllium hydride is formed by the reaction of beryllium chloride with lithium aluminium hydride.
$IV$. Beryllium sulphate is the least soluble sulphate among the sulphates of alkaline earth metals.
The element having atomic number $56$ belongs to
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