Chemistry (M.Phil./Ph.D.) 2015 Panjab University Entrance Exam With Answers

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1.

A reaction mixture is prepared containing 0.60 mol of aluminium and 1.20 mol of manganese dioxide. The mixture is heated until one of the reactants has been completely consumed according to the equation 2AI+3 MinO2 ---> 3 Mn + AI2O3- .What quantity of reactant remains uncombined ?

A: 0.20 mol AI
B: 0.40 mol AI
C: 0.30 mol MnO2
D: 0.60 mol MnO2

The answer is: C

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