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Reena has arranged the following experimental set-up to observe the reactivity of different metals.
In which beaker(s) will there be no reaction?

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An Intiative by Sri Chaitanya

I and III

All of these

IV only

II and IV

answer is B.

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Detailed Solution

In test tube II copper can not displace $H_{2}$ from HCl

In a test tube, IV copper cannot displace Al from $A l_{2} {(S O_{4})}_{3}$ .

In both cases, copper is less reactive than $H_{2} a n d A l$

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