Question

identify the redox reaction out of the following reactions and identify the oxidising and reducing agents in them.​
please answer, it's very urgent

Answer 1

(i) Writing the O.N. of on each atom, 

3HCl+ HNO3 ➡️ CL2+ NOCL+ 2H2O

Here, O.N. of Cl increases from -1 (in HCl) to 0 (in Cl2). Therefore, Cl– is oxidized and hence HCl acts as a reducing agent.

The O.N. of N decreases from +5 (in HNO3) to +3 (in NOCl) and therefore, HNO3 acts as an oxidizing agent.

Thus, reaction (i) is a redox reaction.  

(¡¡) HgCl2+ 2Kl➡️ Hgl+2KCl

Here O.N. of none of the atoms undergo a change and therefore, this is not a redox reaction

(¡¡¡) Fe2O3+ 3CO➡️2Fe +3CO2

Here, O.N. of Fe decreases from +3 (in Fe2O3) to 0 (in Fe) and therefore, Fe2O3 acts as an oxidizing agent.

O.N. of C increases from +2 (in CO) to +4 (in CO2) and therefore, CO acts as a reducing agent. Thus, this is a redox reaction. 

(iv) PCl3+3H2O➡️ 3HCl + H2PO3

Here O.N. of none of the atoms undergo a change and therefore, it is not a redox reaction.

hope it will help u... if u r comfortable with the answer then plz mark me as brainliest......thank u...