Portland cement contains '$X$' to enhance the setting time. What is '$X$'?
- A$CaSO_{4} \cdot \frac{1}{2} H_{2}O$
- B$CaSO_{4} \cdot 2 H_{2}O$
- C$CaSO_{4}$
- D$CaCO_{3}$
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An alkaline earth metal $(M)$ gives a salt with chlorine,which is insoluble in water at room temperature but soluble in boiling water. It also forms an insoluble sulphate whose mixture with a sulphide of a transition metal is called 'lithopone' - a white pigment. Metal $M$ is
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View Solution$Be(OH)_2$ is insoluble in water while $Ba(OH)_2$ is highly soluble due to:
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View SolutionAssertion : Of the various chlorides of alkaline earth metals $BeCl_2$ is covalent in nature,whereas $MgCl_2$ and $CaCl_2$ are ionic compounds.
Reason : $Be$ is the first member of group $2$.
Reason : $Be$ is the first member of group $2$.
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