Multiple choice Which of the following retards the reaction between HNO3 and Sn? High concentration of TiCl3 Small amount of C6H12 O6 FeSO4 NH4Cl Reveal answer Fill a bubble to check yourself C Correct answer Explanation FeSO4 and FeCl3 retard the reaction between tin and HNO3 and cause an increase in the yield of NH3 and a decrease in the hydroxylamine formed.