JEE Main20231 Feb 2023Morning ShiftChemistryd and f Block ElementsActual
A solution of FeCl 3 when treated with K 4 Fe ( CN ) 6 gives a prussian blue precipitate due to the formation of
Options
- AK Fe 2 ( CN ) 6
- BFe Fe ( CN ) 6
- CFe 3 Fe ( CN ) 6 2
- DFe 4 Fe ( CN ) 6 3
Correct answer
D. Fe 4 Fe ( CN ) 6 3
Step-by-step solution
Addition of FeCl 3 to K 4 Fe CN 6 in dilute and cold solution gives a solution, prussian blue solution Fe 4 Fe CN 6 3 . The reaction is as follows: 4 FeCl 3   +   3 K 4 [ Fe ( CN ) 6 ]   →   Fe 4   [ Fe ( CN ) 6   ] 3   +   12 KCl