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0. A silvery white metal X reacts with water at room temperature to produce a water soluble compound Y and a colourless gas Z. The reaction is highly exothermic and the Z catches fire immediately during the reaction. The solution of Y in water on reacting with stoichiometric amount of dilute solution of hydrochloric acid gives a solution of pH = 7.0. The compounds X, Y and Z respectively are (NTSE Stage-II,2014-15)
AI, AI(OH)3 and H2
Ag, AgOH and H2
K, KCI and H2
Na, NaOH and H2
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