The cheap compound having a high melting point used in a furnace is
- A$PbO$
- B$CaO$
- C$HgO$
- D$ZnO$
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Which of the alkaline earth metal halides given below is essentially covalent in nature?
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$I$. All alkaline earth metals give hydrides on heating with hydrogen.
$II$. Calcium hydroxide is used to purify sugar.
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$II$. Calcium hydroxide is used to purify sugar.
$III$. $BeCl_2$ is a dimer in gaseous phase.
Which of the following properties of alkaline earth metals increases with an increase in their atomic number?
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