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0. Two metals which will displace hydrogen and two metals which will not displace hydrogen from dilute acids, respectively are (NTSE Panch kula, Chandigarh, Stage-I, 2012-13)
Potassium, Calcium, Aluminium and Zinc
Sodium, Calcium, Zinc and Iron
Zinc, Iron, Copper, and Mercury
Copper, Mercury, Silver and Gold
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