23. THE RIGHT ANSWER FOR THIS QUESTION IS D. PLEASE, EXPLAIN WHY. Thanks. if you

Question

23. THE RIGHT ANSWER FOR THIS QUESTION IS D. PLEASE, EXPLAIN WHY. Thanks. if you can analyze the other ones and say why they are wrong.

(if you cannot explain properly do not answer. let someone who knows answer it, thanks)

23) Which of the following reactions will occur spontaneously as written? A) 3Fe2. (aq) + Cr). (aq) Cr(s) +3Fe" (aq)1 B) 2Cr" (aq) + 3Sn" (aq)-> 3m" (aq) + 2Cr(s) C) Sn.. (aq) + Fe" (s)- Sn2. (aq) + Fe(s) D sn'. (aq) + Fe" (s) +5n'. (aq) + Fe" (aq) E) 2Cr(s) +3Fe2+(s) 3Fe(s) +2Cr" (aq)

Explanation / Answer

D

here is the simple logic

species that is having highest reduction potential value can act as strong oxidising agent

let me take th D

standard reduction potential values as follows

Sn+2 -----> Sn+4 = -0.14 v

Fe+3 ------> Fe+2 = + 0.77 v

here Fe is having highest value so this will oxidise the Sn from Sn+2 to Sn +3

let me take anothe example C

standared reduction potentioals are

Sn+4 ----> Sn +2 = + 0.14

Fe+2 ------> Fe = -0.14 V

Sn+4 is having highest reduction potential so this should oxidise the Sn+4 but there Sn+4 undergo reduction so

it is not spontanious

similarly other options also.

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