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Amphoteric Metals Reaction

An element X ...

Question

An element X reacts fairly vigorously with cold water to form Y but hydrogen does not ignite

X,Y and Z are Cu, Cu(OH)₂ and CuCl₂ respectively.

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X,Y and Z are Ca, Ca(OH)₂ and CaCl₂respectively

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X,Y and Z are Na, NaOH and NaCl respectively

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X,Y and Z are K, KOH and KCl respectively

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Solution

The correct option is B
X,Y and Z are Ca, Ca(OH)₂ and CaCl₂respectively

Ca reacts fairly vigorously with cold water to form Y but hydrogen does not ignite.
$C a + 2 H_{2} O \to C a (O H)_{2} + H_{2}$
$C a (O H)_{2}$ then react with dil.HCl to form $C a C l_{2}$

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