Question

10g of MnO2 on reaction with HCl forms 2.24 L of Cl2(g) at NTP, the percentage impurity of MnO2 is
MnO2 + 4HCl = MnCl2 + Cl2 + 2H2O

(1) 87%
(2) 25%
(3)33.3%
(4)13%​

Answer 1

Answer:

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Explanation:

I am in class 6

I don't know sorry

Answer 2

4.,13%

Here, as per the given equation, 1 mole of Cl

2

is formed from 1 mole of MnO

2

Therefore,

Number of moles of Cl

2

is n=

22.4L

2.24L

=0.1 mol

Therefore, Mass of Cl

2

is given by W=87g/mol×0.1 mol=8.7 g

Impurity in MnO

2

=10g−8.7g=1.3g

Percentage impurity=

10g

1.3g

×100=13%

Hence, the correct option is 4

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