The standard reduction electrode potentials of the three electrodes $P, Q$ and $R$ are respectively $- 1.76 V, + 0.34 V$ and $+ 0.8 V$ , then

Metal

Q

will displace the cation of

P

from its aqueous solution and deposit the metal

P

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Both metals

Q

and

R

will displace the cation of

P

from its aqueous solution and deposit the metal

P

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Metal

R

will displace the cation of

P

from its aqueous solution and deposit the metal

P

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Metal

P

will displace the cation of

R

from its aqueous solution and deposit the metal

R

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Solution

The correct option is D Metal $P$ will displace the cation of $R$ from its aqueous solution and deposit the metal $R$
The metal that has less standard reduction electrode potential or more negative reduction potential, can displace the other metals (cations) from their aqueous solution. Among the given, $P$ has most negative standard reduction potential, so it will displace $Q$ and $R$ cations from the aqueous solution and deposit them.

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The standard reduction electrode potentials of the three electrodes P,Q and R are respectively −1.76 V,+0.34 V and +0.8 V, then

The standard reduction electrode potentials of the three electrodes $P, Q$ and $R$ are respectively $- 1.76 V, + 0.34 V$ and $+ 0.8 V$ , then