Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 35

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${CrBr}_{3} \to {CrO}_{4}^{2 -} + {BrO}_{_{4}}^{-}$

The total number of electron changes in the above given reaction are

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Important Questions on Redox Reactions

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Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 36

Choose the correct statement for rusting of iron.

a. $Fe$ is oxidised.

b. $O_{2}$ is reduced.

c. $Fe$ is an oxidising agent.

d. It is an intramolecular redox reaction.

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Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 39

Which of the following will not decolorise the pink color of

{KMnO}_{4}

?

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Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 40

The number of moles of

K_{2} {Cr}_{2} O_{7}

in an acidic medium required to oxidize one mole of

{Cu}_{3} P

to

CuO

and

H_{3} {PO}_{4}

is

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Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 44

The number of electrons required to reduce chromium completely in

{Cr}_{2} {O_{7}}^{2 -}

to

{Cr}^{3 +}

in acidic medium, is

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Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 47

The reaction,

K_{2} {Cr}_{2} O_{7} + m {FeSO}_{4} + n H_{2} {SO}_{4} \to {Cr}_{2} {({SO}_{4})}_{3} + p {Fe}_{2} {({SO}_{4})}_{3} + K_{2} {SO}_{4} + q H_{2} O

when balanced,

m, n, p,

and

q

are, respectively:

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Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 48

For

{Zn}^{2 +} / Zn, E ° = - 0.76 V

, for

{Ag}^{+} / Ag, E ° = 0.799 V

. The correct statement is:

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Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 50

15.0 mL

of

0.05 M {SeO}_{2}

reacts with

30.6 mL

of

0.1 M {CrSO}_{4}

and oxidises it to

{Cr}_{2} ({SO}_{4})_{3}

. What is the oxidation state in which

Se

gets converted?

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Chemistry Crash Course NEET>Chapter 6 - Redox Reactions>Level 2>Q 53

The oxidation number of sulphur is

+ 4

in