Redox Reactions Test

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Redox Reactions Test - 5

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Weekly Quiz Competition

Question 1
4 / -1

The reaction, P₄ + 3NaOH + 3H₂O → 3NaH₂ PO₂ + PH₃ is an example of

A
disproportionation reaction

B
neutralisation reaction

C
double-decomposition reaction

D
pyrolytic reaction
Question 2
4 / -1

A
+10

B
+6

C
+3

D
+2

Solution
Question 3
4 / -1

The oxidation state of sulphur in sodium tetrathionate (Na₂S₄O₆ )is

A
2

B
0

C
2.5

D
3.5
Question 4
4 / -1

Oxidation states of X, Y, Z are + 2, + 5 and - 2 respectively. Formula of the compound formed by these will be

A
X₂YZ₆

B
XY₂Z₆

C
XY₅

D
X₃YZ₄
Question 5
4 / -1

Oxidation number of sulphur in Caro's acid is

A
+6

B
+4

C
+8

D
+7
Question 6
4 / -1

Oxidation state of sulphur in Na₂ S₂ O₃ and Na₂ S₄ O₆

A
4 and 6

B
3 and 5

C
2 and 2.5

D
6 and 6
Question 7
4 / -1

The oxidation states of iodine in HIO₄, H₃IO₅ and H₅IO₆ respectively, are

A
+1, +3, +7

B
+ 7, +7, +3

C
+ 7, +7, +7

D
+ 7, +5, +3
Question 8
4 / -1

Which of the following acts as an oxidising as well as reducing agent ?

A
Na₂O

B
Na₂O₂

C
NaNO₃

D
NaNO₂
Question 9
4 / -1

In which of the following reactions, H₂O₂ acts as a reducing agent?
H₂O₂ + 2H⁺ + 2e^- → 2H₂O
H₂O₂ - 2e^- → O₂ + 2H⁺
H₂O₂ - 2e^- → O₂ + 2H^-
H₂O₂ + 2H⁺ + 2e^- → O₂ + 2H₂O

A
I and II

B
III and IV

C
I and III

D
II and III
Question 10
4 / -1

A
1, 4, 4, 1, 2

B
1, 4, 2, 1, 2

C
1, 4, 3, 1, 2

D
1, 4, 1, 1, 2

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Redox Reactions Test - 5

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Redox Reactions Test - 5

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Question 1

disproportionation reaction

neutralisation reaction

double-decomposition reaction

pyrolytic reaction

Question 2

+10

+6

+3

+2

Solution

Question 3

2

0

2.5

3.5

Question 4

X2YZ6

XY2Z6

XY5

X3YZ4

Question 5

+6

+4

+8

+7

Question 6

4 and 6

3 and 5

2 and 2.5

6 and 6

Question 7

+1, +3, +7

+ 7, +7, +3

+ 7, +7, +7

+ 7, +5, +3

Question 8

Na2O

Na2O2

NaNO3

NaNO2

Question 9

I and II

III and IV

I and III

II and III

Question 10

1, 4, 4, 1, 2

1, 4, 2, 1, 2

1, 4, 3, 1, 2

1, 4, 1, 1, 2

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X₂YZ₆

XY₂Z₆

XY₅

X₃YZ₄

Na₂O

Na₂O₂

NaNO₃

NaNO₂