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

8.2. What is the oxidation number of the underlined elements in each of the following and how do you rationalise your results?

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Vishal Baghel | Contributor-Level 10

10 months ago

(a) In Kl₃, since the oxidation number of K is +1, therefore, the average oxidation number of iodine = -1/3. But the oxidation number cannot be fractional. Therefore, we must consider its structure, K⁺ [I —I <— I]^–. Here, a coordinate bond is formed between I₂molecule and I^– ion. The oxidation number o

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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)

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