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General Principles and processes of Isolation of Elements
easy
The metal $X$ is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from which hydrogen gas is released on treatment with water. The metal is
A
$Al$
B
$Ca$
C
$Cu$
D
$Zn$
Solution
Calcium is obtained by electrolysis of $CaCl _2$. $Ca$ reacts with hydrogen to form calcium hydride $\left( CaH _2\right)$ which is a colourless solid. Calcium hydride reacts with water to form calcium hydroxide and dihydrogen gas.
Standard 12
Chemistry
