Two metals which will displace hydrogen and two metals which will not displace hydrogen from dilute acids, respectively are

potassium, calcium, aluminium and zinc

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sodium, calcium, zinc and iron

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zinc, iron, copper and mercury

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copper, mercury, silver and gold

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Solution

The correct option is C zinc, iron, copper and mercury
In electrochemical series, position of Zn and iron is above hydrogen where as copper and mercury are placed below hydrogen. Hence, Zn and Fe can replace hydrogen from dilute acids whereas copper and mercury do not.

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Similar questions

Name two metals which will displace hydrogen from dilute acids, and two metals which will not.

The figure represents the reactivity of metals then which of the following are correct?

(i) Sodium is more reactive than magnesium.

(ii) Magnesium ad aluminium metals displace lead.

(iii) Magnesium and aluminium metals displace calcium.

(iv) Iron and tin metals can displace magnesium.

(v) Most reactive metal is sodium.

(vi) Gold is least reactive.

(vii) Calcium and zinc metals displace iron.

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