Redox Reactions Test

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Redox Reactions Test - 71

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Weekly Quiz Competition

Question 1
1 / -0

Oxidation states of $$P$$ in $$H_4P_2O_5, \ H_4P_2O_6, \ H_4P_2O_7$$ are respectively

A
$$+3, \ +5, \ +4$$

B
$$+5, \ +3, \ +4$$

C
$$+5, \ +4, \ +3$$

D
$$+3, \ +4, \ +5$$

Solution
Question 2
1 / -0

The pair of compounds in which both the metals are in the highest possible oxidation state is

A
$$FeSO_{4},CuS_{2}$$

B
$$CrO_{2}Cl_{2}, MnO_{4}^{-}$$

C
$$TiO_{2},MnO_{2}$$

D
$$[Co(CN_{3})]^{3-}, MnO_{3}$$

Solution
Question 3
1 / -0

The number of electrons involved when 1 mole of $$H_2O_2$$decomposes as
$$H_2O_2 \longrightarrow H_2O + O_2$$ is?

A
1

B
6

C
2

D
4
Question 4
1 / -0

On the basis of the following $$E^0$$ the strongest oxidising agent is:
$$\begin{array}{l}{\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{4 - }} \to {\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{3 - }} + {e^ - };{E^0} = - 0.35V\\F{e^{2 + }} \to F{e^{3 + }} + {e^ - };{E^0} = - 0.77V\end{array}$$

A
$$F{e^{3 + }}$$

B
$${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{3 - }}$$

C
$${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{4 - }}$$

D
$$F{e^{2 + }}$$
Question 5
1 / -0

Which is a redox reaction ?

A
$${ 2CuI }_{ 2 }\rightarrow CuI+{ I }_{ 2 }$$

B
$$NaCl+AgNO_{ 3 }\rightarrow AgCl+NaNO_{ 3 }$$

C
$${ NH }_{ 4 }Cl+NaOH\rightarrow { NH }_{ 3 }+NaCl+H_{ 2 }O$$

D
$${ Cr }_{ 2 }{ \left( { SO }_{ 4 } \right) }_{ 3 }+6KOH\rightarrow 2Cr{ \left( OH \right) }_{ 3 }+{ 3K }_{ 2 }{ SO }_{ 4 }$$
Question 6
1 / -0

The compound $$YBa_2Cu_3O_7$$, which shows super conductivity, has copper in the oxidation state:

A
$$+\dfrac{7}{3}$$

B
$$+\dfrac{3}{7}$$

C
$$3$$

D
$$7$$
Question 7
1 / -0

The oxidation number of carbon in $$CH_2F_2$$ is:

A
$$0$$

B
$$1$$

C
$$4$$

D
$$6$$
Question 8
1 / -0

The sum of oxidation states of all atoms in $$ClO_4^-$$ is:

A
0

B
-4

C
-1

D
+2

Solution
Question 9
1 / -0

Which of the following arrangement represents increasing O.N. of central atom.

A
$${ CrO }_{ 2 }^{ - },{ ClO }_{ 3 }^{ - },{ CrO }_{ 4 }^{ 2- },{ MnO }_{ 4 }^{ - }$$

B
$${ ClO }_{ 3 }^{ - },{ CrO }_{ 4 }^{ 2- },{ MnO }_{ 4 }^{ - },{ CrO }_{ 2 }^{ - }$$

C
$${ CrO }_{ 2 }^{ - },{ ClO }_{ 3 }^{ - },{ MnO }_{ 4 }^{ - },{ CrO }_{ 4 }^{ 2- }$$

D
$${ CrO }_{ 4 }^{ 2- },{ MnO }_{ 4 }^{ - },{ CrO }_{ 2 }^{ - },{ ClO }_{ 3 }^{ - }$$
Question 10
1 / -0

The number of mole of ferrous oxalate oxidized by one mole of $$ KMnO_{4}$$ in acidic medium is:

A
1.66

B
5

C
0.6

D
2

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Re-Attempt Weekly Quiz Competition

Redox Reactions Test - 71

Result

Redox Reactions Test - 71

Score

-

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SHARING IS CARING

Question 1

$$+3, \ +5, \ +4$$

$$+5, \ +3, \ +4$$

$$+5, \ +4, \ +3$$

$$+3, \ +4, \ +5$$

Solution

Question 2

$$FeSO_{4},CuS_{2}$$

$$CrO_{2}Cl_{2}, MnO_{4}^{-}$$

$$TiO_{2},MnO_{2}$$

$$[Co(CN_{3})]^{3-}, MnO_{3}$$

Solution

Question 3

1

6

2

4

Question 4

$$F{e^{3 + }}$$

$${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{3 - }}$$

$${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{4 - }}$$

$$F{e^{2 + }}$$

Question 5

$${ 2CuI }_{ 2 }\rightarrow CuI+{ I }_{ 2 }$$

$$NaCl+AgNO_{ 3 }\rightarrow AgCl+NaNO_{ 3 }$$

$${ NH }_{ 4 }Cl+NaOH\rightarrow { NH }_{ 3 }+NaCl+H_{ 2 }O$$

$${ Cr }_{ 2 }{ \left( { SO }_{ 4 } \right) }_{ 3 }+6KOH\rightarrow 2Cr{ \left( OH \right) }_{ 3 }+{ 3K }_{ 2 }{ SO }_{ 4 }$$

Question 6

$$+\dfrac{7}{3}$$

$$+\dfrac{3}{7}$$

$$3$$

$$7$$

Question 7

$$0$$

$$1$$

$$4$$

$$6$$

Question 8

0

-4

-1

+2

Solution

Question 9

$${ CrO }_{ 2 }^{ - },{ ClO }_{ 3 }^{ - },{ CrO }_{ 4 }^{ 2- },{ MnO }_{ 4 }^{ - }$$

$${ ClO }_{ 3 }^{ - },{ CrO }_{ 4 }^{ 2- },{ MnO }_{ 4 }^{ - },{ CrO }_{ 2 }^{ - }$$

$${ CrO }_{ 2 }^{ - },{ ClO }_{ 3 }^{ - },{ MnO }_{ 4 }^{ - },{ CrO }_{ 4 }^{ 2- }$$

$${ CrO }_{ 4 }^{ 2- },{ MnO }_{ 4 }^{ - },{ CrO }_{ 2 }^{ - },{ ClO }_{ 3 }^{ - }$$

Question 10

1.66

5

0.6

2

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