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OpenStudy (anonymous):
Which metal will displace hydrogen form aqueous solutions of acids but not from cold water? a)calcium b)copper c)sodium d)zinc
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OpenStudy (anonymous):
I think it is Zinc.
OpenStudy (chmvijay):
its based on electrochemical series :) Metals which are above Hydrogen in the reactivity series can displace Hydrogen from Hydrochloric acid
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