JEE Main202227 Jul 2022Morning ShiftChemistryd and f Block ElementsActual
Given below are two statements: Statement I : Iron (III) catalyst, acidified K 2 Cr 2 O 7 and neutral KMnO 4 have the ability to oxidise I - to I 2 independently. Statement II: Manganate ion is paramagnetic in nature and involves pπ - pπ bonding. In the light of the above statements, choose the correct answer from the options.
Options
- ABoth statement I and Statement II are ture
- BBoth statement I and Statement II are false
- CStatement I is true but Statement II is false
- DStatement I is false but Statement II is true
Correct answer
B. Both statement I and Statement II are false
Step-by-step solution
Iodine is liberated from potassium iodide. 10 I − + 2 MnO 4 − + 16 H + → 2 Mn 2 + + 8 H 2 O + 5 I 2 K 2 Cr 2 O 7 Potassium   dichromate + 7 H 2 SO 4 + 6 KI → Cr 2 SO 4 3 + 3 I 2 + 4 K 2 SO 4 + 7 H 2 O 2 Fe 3 + + 2 KI → 2 Fe 2 + + I 2 + 2 K +