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Q.

A mixture of magnesium chloride and magnesium sulphate is known to contain $0.6$ moles of chloride ion and $0.2$ moles of sulphate ions. For quantitative estimation of Mg, the above mixture is treated with a set of reagents to form $M g_{2} P_{2} O_{7}$ , moles of $M g_{2} P_{2} O_{7}$ produced is :

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a

$0.25$

b

$0.7$

c

$0.5$

d

$0.8$

answer is B.

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Detailed Solution

$0.6 mole {Cl}^{-} \Rightarrow 0.3 mol {MgCl}_{2}$

$0.2 mol {SO}_{4}^{2 -} \Rightarrow 0.2 mol {MgSO}_{4}$

POAC on $Mg$

$0.3 \times 1 + 0.2 \times 1 = n \times 2$

By this relation, produced moles of $M g_{2} P_{2} O_{7}$ will be equal to $0.25$

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A mixture of magnesium chloride and magnesium sulphate is known to contain 0.6 moles of chloride ion and 0.2 moles of sulphate ions. For quantitative estimation of Mg, the above mixture is treated with a set of reagents to form Mg2P2O7, moles of Mg2P2O7 produced is :