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Q.

‘x’ grams of 50 % pure potassium chlorate liberates 0.3 moles of oxygen on thermal decomposition. ‘x’ grams of pure H2SO4 require _____grams of NaOH for complete neutralization
(MW of potassium chlorate = 122.5)

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a

20 g

b

40 g

c

60 g

d

50 g

answer is B.

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Detailed Solution

2KClO3⟶Δ2KCl+3O2 2(122.5g)3moles?0.3moles WKClO3(100% pure )=24.5gWKClO3(50% pure )=49gH2SO4+2NaOH→Na2SO4+2H2O98g 2(40g)49g 40g

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