Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The dark purple colour of  disappears in the titration with oxalic acid in acidic medium.

The dark purple colour of \mathrm{\mathrm{KMnO}_{4}} disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese in the reaction is :

Option: 1

5


Option: 2

1


Option: 3

7


Option: 4

2


Answers (1)

best_answer

In Acidic medium permagnate ion \mathrm{(MnO_{4}^{-})} act as oxidizing agent reducing itself to \mathrm{Mn^{2+}} ion.

Balanced reaction is

\mathrm{\begin{array}{r} \mathrm{MnO}_4^{-}+8 \mathrm{H}^{+}+5 e^{-} \longrightarrow \mathrm{Mm}^{2+}+4 \mathrm{H}_2 \mathrm{O} \\ \end{array}}

\mathrm{2 \mathrm{MnO}_4^{-}+5 \mathrm{C}_2 \mathrm{O}_4^{2-}+16 \mathrm{H}^{+} \longrightarrow 2 \mathrm{Mm}^{2+}+10 \mathrm{CO}_2+8 \mathrm{H}_2 \mathrm{O}}

Hence, the correct answer is Option (1).

Posted by

mansi

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

BTech aspirant from north-east or UT? Apply for CSAB NEUT counselling 2025 today
anam-khan

JoSAA round 2 cut-off 2025 out; BTech closing ranks for top engineering courses at IITs
anam-khan

Goa Engineering Admission 2025: 1,415 eligible for BE seats; merit list on June 27

Latest Question