Which of the following samples of reducing agents ischemically equivalent to 25 mL of 0-2 N KMnO4 to be reduced to Mn2- and water-

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Valency and Oxidation States

Which of the ...

Question

Which of the following samples of reducing agents is\are chemically equivalent to $25$ mL of $0.2 N K M n O_{4}$ to be reduced to $M n^{2 +}$ and water?

25

mL of

0.2 M F e S O_{4}

to be oxidized to

F e^{3 +}

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50

mL of

0.1 M H_{3} A s O_{3}

to be oxidized to

H_{3} A s O_{4}

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25

mL of

0.1 M H_{2} O_{2}

to be oxidized to

H^{+}

and

O_{2}

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25

mL of

0.1 M S n C l_{2}

to be oxidized to

S n^{4 +}

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Solution

The correct options are
A $25$ mL of $0.2 M F e S O_{4}$ to be oxidized to $F e^{3 +}$
B $25$ mL of $0.1 M S n C l_{2}$ to be oxidized to $S n^{4 +}$
D $25$ mL of $0.1 M H_{2} O_{2}$ to be oxidized to $H^{+}$ and $O_{2}$
Normality = Molarity x absolute of (total production oxidation state - total reactant oxidation state)
Moles used = volume in liters X Normality
Moles of $K M n O_{4}$ = $0.025 X 0.2 = 0.005$
Option A= $0.025 X 0.2 X | (3 - 2) | = 0.005$
Option B= $0.05 X 0.1 X | (5 - 3) | = 0.01$
Option C= $0.025 X 0.1 X | (0 - 2) | = 0.005$
Option D= $0.025 X 0.1 X | (4 - 2) | = 0.005$
Hence Options A,C and D are correct

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Similar questions

Q. Which of the following samples of reducing agents is/are chemically equivalent to 25 ml of 0.2 N

K M n O_{4}

to be reduced to

M n^{2 +}

and water?

M n O_{4}^{-}

ions are reduced in acidic condition to

M n^{2 +}

ions whereas they are reduced in neutral condition to

M n O_{2}^{+}

.The oxidation of 25 ml of a solution

X

containing

F e^{2 +}

ions required in acidic condition 20 ml of solution

Y

containing

M n O_{4}^{-}

ions. What volume of solution

Y

would be required to oxidize 25 ml of solution

X

containing

F e^{2 +}

ions in neutral condition?

Q. 1.80 g of a metal oxide required 833 mL of hydrogen at NTP to be reduced to its metal. Find the equivalent weight of the oxide and the metal.

100

mL of

0.01 M

K M n O_{4}

oxidized

100

mL of

H_{2} O_{2}

in acidic medium. The volume of the same

K M n O_{4}

required in alkaline medium to oxidize

100

mL of the same

H_{2} O_{2}

will be :

(

M n O_{4}^{⊝}

changes to

M n^{2 +}

in acidic medium and to

M n O_{2}

in alkaline medium)

1.70 g

of a metal oxide required

933 mL

of hydrogen at STP to be reduced to a pure metal. Find the equivalent weight of the metal.

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Which of the following samples of reducing agents is\are chemically equivalent to 25 mL of 0.2NKMnO4 to be reduced to Mn2+ and water?

Which of the following samples of reducing agents is\are chemically equivalent to $25$ mL of $0.2 N K M n O_{4}$ to be reduced to $M n^{2 +}$ and water?