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Q.

The standard reduction potentials of three electodes P, Q and R are respectively – 1.76 V, 0.34 V and 0.8 V. Then

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a

Metal Q will displace the cation of P from its aqueous solution and deposit the metal P

b

Both metals Q and R will displace the cation of P from its aqueous solution and deposit the metal P

c

Metal P will displace the cation of R from its aqueous solution and deposit the metal R

d

Metal R will displace the cation of Q and deposit the metal Q.

answer is C.

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Detailed Solution

Lower SRP metal displaces Higher SRP metals from their salt solutions.Since SRP of P is least it displaces Q and R from their salt solutions.SRP of Q is lesser than R displaces R from its salt solution but doesnot displace P because its SRP is higher than PR does not displace  any of the given because its SRP is higher among all the  given.
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The standard reduction potentials of three electodes P, Q and R are respectively – 1.76 V, 0.34 V and 0.8 V. Then