Which of the following reactions is/are redox reactions? You may select more tha
ID: 904752 • Letter: W
Question
Which of the following reactions is/are redox reactions? You may select more than one reaction.
Pb(NO3)2(aq) + Ni(s) = Pb(s) + Ni(NO3)(aq)
Ag+(aq) + e = Ag(s)
HNO2(aq) + O3(g) = HNO3(aq) + O2(g)
NiCl2(aq) + K2S(aq) = 2KCl(aq) + NiS(s)
2HF(aq) + Na2CO3(aq) = 2NaF(aq) + H2O(l) + CO2(g)
HCl(aq) + AgNO3 (aq) = AgCl(s) + HNO3(aq)
Pb(NO3)2(aq) + Ni(s) = Pb(s) + Ni(NO3)(aq)
Ag+(aq) + e = Ag(s)
HNO2(aq) + O3(g) = HNO3(aq) + O2(g)
NiCl2(aq) + K2S(aq) = 2KCl(aq) + NiS(s)
2HF(aq) + Na2CO3(aq) = 2NaF(aq) + H2O(l) + CO2(g)
HCl(aq) + AgNO3 (aq) = AgCl(s) + HNO3(aq)
Explanation / Answer
1. Pb before is +2 and after is 0. Similarly Ni before 0 state and after +2. So, REDOX
2. Ag before +1 and after 0. REDOX
3. N changing satae so, REDOX
4. No change in oxidation state of any element. NOT REDOX
5. No change in oxidation state of any element. NOT REDOX