When the gases Sulphur dioxide and hydrogen sulphide mix in the presence of water the reaction is s02 + 2H2S 2H2O + 35 Here
hydrogen sulphide is acting as :-

It has to be b i hope this

18

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium