When acidified K2Cr2O7 the solution is added to Sn++ salt then Sn++ changes to

1. Sn 2. Sn3+
3. Sn4+ 4. Sn+
 
 



Hint: K2Cr2O7 is a strong oxidising agent

When the acidified K2Cr2O7 solution is added to Sn2+ salts then Sn2+ changes to Sn4+
The reaction is given below