Class 11th Redox Reactions Redox Reactions Chemistry Ncert Solutions Chemistry Class 11th

8.19. Balance the following equations in basic medium by ion-electron method and oxidation number methods and identify the oxidising agent and the reducing agent.
(a) P₄(s) + OH^–(aq) → PH₃(g) + H₂PO₂^–(aq)
(b) N₂H₄(l) + ClO^–(aq) → NO(g) + Cl^-(aq)
(c) Cl₂O₇(g) + H₂O₂(aq) → ClO₂^–(aq) + O₂(g) + H⁺

257 Views|Posted 10 months ago

Asked by Shiksha User

1 Answer

Sort by:

V

Answered by

Vishal Baghel | Contributor-Level 10

10 months ago

(a) Oxidation number method:
The oxidation number of P decreases from 0 to -3 and increases from 0 to +2. Hence, P₄? is oxidizing as well as reducing agent.
During reduction, the total decrease in the oxidation number for 4 P atoms is 12.
During oxidation, total increase in the oxidation number for

Upvote

Thumbs Down Icon

Similar Questions for you

How many of these compounds will undergo disproportionation on hydrolysis? CO?, NO?, Cl?, F?, ClO?, Cl?O?, N?O?, SO?, P?O??

$\overset{\overset{+ 4}{{N O}_{2}}}{2} + H_{2} O \to \overset{+ 3}{{H N O}_{2}} + \overset{+ 5}{H N O}_{3}$

$\overset{0}{{C l}_{2}} + H_{2} O \to \overset{- 1}{H C l} + H O C l$

$2 \overset{+ 4}{{C l O}_{2}} + H_{2} O \to \overset{+ 3}{{H C l O}_{2}} + \overset{+ 5}{{H C l O}_{3}}$

$\overset{+ 6}{{C l}_{2}} O_{6} + H_{2} O \to \overset{+ 5}{{H C l O}_{3}} + \overset{+ +^{+}}{{C l O}_{4}}$

40. Best reducing agent is:
(a) He (b) Be (c) Li (d) Al

Kindly go through the solution

(c) Li

37. Which element is considered to have oxidation number of +3 in all its compounds?

(a) Be (b) Li (c) Al (d) Sc

Kindly go through the solution

(c) Al

36. Oxidation number ofS in S₂O₈^-2is

(a) -2 (b) -6 (c) +2 (d) +6

Kindly go through the solution

(d) +6

32. Assertion: Na⁺ ion has an oxidation number of +1, Mg²⁺ ion, +2, Fe³⁺ion, +3, Cl^– ion, –1, O^2– ion, –2; and so on.

Reason: For ions composed of only one atom, the oxidation number is equal to the charge on the ion.

Kindly go through the solution

(a)

Taking an Exam? Selecting a College?

Get authentic answers from experts, students and alumni that you won't find anywhere else.

On Shiksha, get access to

66K

Colleges

|

1.2K

Exams

|

6.9L

Reviews

|

1.8M

Answers

Learn more about...

Chemistry Redox Reactions 2025

Chemistry Redox Reactions 2025

View Exam Details

Most viewed information

Share Your College Life Experience

Didn't find the answer you were looking for?

Search from Shiksha's 1 lakh+ Topics

or

Ask Current Students, Alumni & our Experts

Quick Actions

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Have a question related to your career & education?

or

See what others like you are asking & answering