Redox Reactions class 11 chemistry chapter 6 exercise solutions

Redox Reactions class 11 chemistry chapter 6 exercise solutions

problems solved :

Oxidants/ Oxidising agent : A reagent/
substance which itself undergoes reduction and
causes oxidation of another species is called
oxidant /oxidising agent. Now consider some
more examples.
Mg(s) + F2
(g) Mg F2
(s) (6.5)
Mg (s) + S(s) MgS (s) (6.6)
The above reactions are also examples
of oxidation though no oxygen is involved
and thus scope of oxidation can be expanded.
Combination with electronegative element is
oxidation. Oxidation can also be looked upon
as the removal of electropositive element.
For example
Hg2
Cl2
(s) HgCl2
(s) + Hg(s) (6.7)
Now let us consider some examples of
reduction.
a. Removal of oxygen from mercuric oxide
2 HgO (s) 2 Hg (l) + O2
(g) (6.8)
b. Removal of electronegative element from
FeCl3 as in
2 FeCl3
+ H2
(g) 2FeCl2
(aq) + 2 HCl
(6.9)
c. Addition of hydrogen
CH2
= CH2
(g) + H2
(g) CH3 - CH3
(g)
(6.10)
2 HgCl2
(aq) + SnCl2 (aq) Hg2
Cl2
(s) +
SnCl4
(aq) (6.11)
In eq. (6.8) there is removal of oxygen
from mercuric oxide Eq (6.9) shows removal of
electronegative element from FeCl3
Eq (6.10)
involves addition of hydrogen. Equation (6.11)
involves addition of an electropositive element
Hg to HgCl2
. All these reactions represent
reduction.
Reductant / reducing agent : A reagent /
reducing agent is defined as a substance/
reagent which itself undergoes oxidation
bringing about the reduction of another
species. Now consider again equation (6.11).
The equation (6.11) involves simultaneous
oxidation and reduction. In this reaction HgCl2
is reduced to Hg2
Cl2
and SnCl2
is oxidized to
SnCl4
. Hence it is redox reaction.

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Redox Reactions class 11 chemistry chapter 6 exercise solutions
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class 11 chemistry chapter 6 redox reaction exercise solutions
chemistry class 11 chapter 6 redox reaction exercise
1. Choose the most correct option
A. Oxidction numbers of Cl atoms marked.

respectively are :
a. 1, 2, 6, 6
b. 6, 1, 2, 4
c. 1, 6, 2, 6
d. 1, 2, 4, 6
E. For the following redox reactions, find
the correct statement.
Sn2⊕ + 2Fe3⊕ Sn4⊕ + 2Fe2⊕
a. Sn2⊕ is undergoing oxidation
b. Fe3⊕ is undergoing oxidation
c. It is not a redox reaction
d. Both Sn2⊕ and Fe3⊕ are oxidised
F. Oxidation number of carbon in H2
CO3
is
a. +1 b. +2
c. +3 d. +4
G. Which is the correct stock notation for
magenese dioxide ?
a. Mn(I)O2 b. Mn(II)O2
c. Mn(III)O2 d. Mn(IV)O2
I. Oxidation number of oxygen in
superoxide is
a. -2 b. -1 c. -
1
2
d. 0
J. Which of the following halogens does
always show oxidation state -1 ?
a. F
b. Cl
c. Br
d. I
K. The process SO2 S2
Cl2
is
a. Reduction
b. Oxidation
c. Neither oxidation nor reduction
d. Oxidation and reduction.
2. Write the formula for the following
compounds :
A. Mercury(II) chloride
B. Thallium(I) sulphate
C. Tin(IV) oxide
D. Chromium(III) oxide
3. Answer the following questions
A. In which chemical reaction does carbon
exibit variation of oxidation state from
-4 to +4 ? Write balanced chemical
reaction.
B. In which reaction does nitrogen
exibitvariation of oxidation state from
-3 to +5 ?

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[Qasimkhan]

Sir Q4 ka full answer nhi ha 😢
Please upload full answers

[afzalgaming]

Thank you so much sir for uploading this video ❤❤

[priyankapawar]

Q 3, c, d and g is wrong.g is answer is -5 and d is answer is -15