An unknown compound A (Mn(x)O(y)) compo...

An unknown compound A `(Mn_(x)O_(y))` composed of manganese and oxygen , has 36.7% oxygen by weight. When 8.7 g of A is heated with HCl it liberates `Cl_(2)` gas as per the following reaction:
`Mn_(x)O_(y) +HCl rarr MnCl_(2)+Cl_(2)+H_(2)O` (unbalanced)
The simplest formula of A is:

MnO

`MnO_(2)`

`Mn_(2)O_(3)`

`Mn_(3)O_(4)`

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The correct Answer is:

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An unknown compound A (Mn_(x)O_(y)) composed of manganese and oxygen , has 36.7% oxygen by weight. When 8.7 g of A is heated with HCl it liberates Cl_(2) gas as per the following reaction: Mn_(x)O_(y) +HCl rarr MnCl_(2)+Cl_(2)+H_(2)O (unbalanced) The volume of Cl_(2) gas at STP obtained when 8.7 gm of compound A is heated with excess of HCl , (assume molecular formula and , empirical formula to be same):

1.135 L

2.27 L

4.54 L

0.567 L

`MnO_(2)` is being reduced to `MnCl_(2)`

HCl is being reduced to `Cl_(2)`

`MnO_(2)` is acting as a reducing agent

HCl is an oxidant

`H^(+)`, `H_(2)O`

`Cr_(2)O_(7)^(2-)`, `Cr^(3+)`

`I^(-)`, `I_(2)`

None of them are balanced