Home
Class 11
CHEMISTRY
Complete the following reactions: (a) Mn...

Complete the following reactions: `(a) MnO_2+KOH +O_2 rarr`
(b)`I^-+MnO_4^-+H^+ rarr`
( c) `Cr_2O_7^(2-)+Sn^(2+)+H^+rarr`

A

x = 4, y = 6

B

x = 3, y = 8

C

x = 8, y = 6

D

x = 8, y = 3

Text Solution

Verified by Experts

The correct Answer is:
D
`overset(+7)(KMnO_4)rarroverset(+4)(MnO_2)" "...(i)` (Reduction)
`overset(-3)(NH_3)rarroverset(+5)(KNO_3)" "....(ii)` (Oxidation)
There is change in oxidation no. of 3 units in eq. (i) and 8 units in equation (ii). So multiplying eq. (i) by 8 and eq. (ii) by 3 and adding:
`8KMnO_(4) +3NH_3 rarr 8MnO_(2) + 3KNO_3`
Adding KOH molecule to balance K – atoms and `H_2O` molecule to balance H and O atoms:
`8KMnO_(4) +3NH_3 rarr 8MnO_(2) + 3KNO_3 + 5KOH + 2H_2O`
Hence x 8 , y = 3
Promotional Banner

Similar Questions

Explore conceptually related problems

Complete the following reactions (i) O_(2)^(2-)+H_(2)O rarr (ii) O_(2)^(-) +H_(2)O rarr

Complete the following reaction: (i) Cl_(2) + H_(2)O rarr (ii) XeF_(6) + 3H_(2)O rarr

Complete the following chemical reactions: (a) MnO_2+4HCL rarr (b) XeF_6+KF rarr (c) I^(-)(aq)+ H^(+)(aq)+O_2(g) rarr

Complete the reactions : SO_(2) + MnO_(4)^(−) + H_(2)O →

Complete the following reactions (a) XeF_(4) + H_(2)O rarr (b) XeF_(6) + SiO_(2) rarr (c ) XeF_(6) + H_(2) rarr (d) XeF_(6) + H_(2)O rarr (e ) XeF_(6) + SbF_(5) rarr (f) XeF_(6) + NH_(3) rarr

Consider the following reactions : (i) C_(2)O_(4)^(2-) rarr CO_(2) (ii) SO_(4)^(2-) rarr SO_(3)^(2-) (iii) MnO_(4)^(2-) rarr MnO_(4)^(-) (iv) Fe^(3+) rarr Fe^(2+) Choose the correct answer -

Complete the following reactions : (a) AI(OH)_(4)^(-) + CO_(2) rarr ? + ? + ? (b) Ag^(+) + Na_(2)S_(2)O_(3) rarr ? + ? (c) MnO_(4)^(-) + H_(2)S overset(Delta)rarr ? + ?

Complete and balance the following reactions (i) Zn+NO_(3)^(-)rarr Zn^(2+)+NH_(4)^(+) (ii) Cr_(2)O_(7)^(2-)+C_(2)H_(4)O rarrC_(2)H_(4)O_(2)+Cr^(3+)

Complete the chemical reactions : (i) MnO_4^(-) + SO_2 + H^(+) to (ii) S_2O_3^(2-) + Cr_2O_7^(2-) + H^(+) to