A 2 O n is oxidized to AO 3-by KM nO 4 in acidic medium- If 1-34 mmol of A 2 O n requires 32-2 mL of 0-05 M acidified KMnO 4 solution forcomplete oxidation- which of the following statements is-are correct-A- The value of n-2B- Empirical formula of the oxide is AOC- 1-0 mole of A 2 O n would require 1-0 mole of acidified K 2 Cr 2 O 7 solutionD- -A- can be a metal from second group of the periodic table

The correct options are A The value of n = 2 B Empirical formula of the oxide is AO C 1.0 mole of nbsp;A_2O_n would require 1.0 mole of acidified K_2Cr_2O_7 ...

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Byju's Answer

Standard XII

Chemistry

Stoichiometric Calculations

A 2 O n is ox...

Question

$A_{2} O_{n}$ is oxidized to $A O_{3}^{-}$ by $K M n O_{4}$ in acidic medium. If 1.34 mmol of $A_{2} O_{n}$ requires 32.2 mL of 0.05 M acidified $K M n O_{4}$ solution for complete oxidation, which of the following statement(s) is/are correct?

The value of n = 2

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Empirical formula of the oxide is AO

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1.0 mole of

A_{2} O_{n}

would require 1.0 mole of acidified

K_{2} C r_{2} O_{7}

solution

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'A' can be a metal from second group of the periodic table

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Solution

The correct options are
A
The value of n = 2

B
Empirical formula of the oxide is AO

C 1.0 mole of $A_{2} O_{n}$ would require 1.0 mole of acidified $K_{2} C r_{2} O_{7}$ solution
The oxidation reaction is: $A_{2} O_{n} \to 2 A O_{3}^{-}$
$\Rightarrow n - f a c t o r = 10 - 2 n$
$\Rightarrow (10 - 2 n) \times 1.34 = 32.2 \times 0.05 \times 5$
$\Rightarrow n = 2$
n-factor = 10 - 4 =6
Thus, the molecular formula of the compound is $A_{2} O_{2}$ and the empirical formula is $A O$ .
Since the n-factor is 6, 1.0 mole of $A_{2} O_{n}$ can be oxidized by using 1.0 mole of $K_{2} C r_{2} O_{7}$ , which has the same n-factor.
'A' can't be a metal from the second group as it changes its oxidation state from +2 to +5.

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A2On is oxidized to AO−3 by KMnO4 in acidic medium. If 1.34 mmol of A2On requires 32.2 mL of 0.05 M acidified KMnO4 solution for complete oxidation, which of the following statement(s) is/are correct?

$A_{2} O_{n}$ is oxidized to $A O_{3}^{-}$ by $K M n O_{4}$ in acidic medium. If 1.34 mmol of $A_{2} O_{n}$ requires 32.2 mL of 0.05 M acidified $K M n O_{4}$ solution for complete oxidation, which of the following statement(s) is/are correct?