JEE Advanced levelSingle correct optionDifficulty 3 of 3ph035
Sodium hypochlorite on warming disproportionates as 3NaOCl2NaCl+NaClOX3. The number of electrons transferred per formula unit of NaClOX3 formed is
A6
B2
C4
D5
Answer: C
Chlorine changes from +1 to +5 in NaClOX3, a loss of 4 electrons. Two Cl atoms go from +1 to -1, each gaining 2, a total of 4. So 4 electrons are transferred.