KVPY SA Exam 19-Nov-2017 Question Paper

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Question : 40 of 80

Marks: +1, -0

Which of the following transformations can be carried out by using HI as a rducing agent, under acidic conditions ?
[Given :

I_2(s) → 2I– E^θ = 0.54 V]

(i)

Cu^{+ }→ Cu(s) E^θ = 0.52 V

(ii)

Cr^{3+} → Cr^{2+} E^θ = – 0.41 V

(iii)

Fe^{3+} → Fe^{2+} E^θ = 0.77 V

(iv)

Fe^{2+} →Fe(s) E^θ = – 0.44 V

(i) and (iii)
(ii) and (iv)
only (iii)
only (ii)

Solution:

Fe^{+3} →Fe ^{+2}

is having maximum SRP value.

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