If the value of ∆H for a reaction is negative, it means that the reaction is?
A. slow B. exothermic C. spontaneous D. irreversible E. not feasible Correct Answer: Option B – exothermic
What is the value of x in the following equation? MnO4‾ + 4H+ + xe- → MnO2 + 2H2O
A. 2 B. 3 C. 4 D. 7 E. 8 Correct Answer: Option B – 3
From the following equations, what is the order of decreasing reactivity of X, Y and Z?
Y (s) + X²+(aq) → Y²+(aq) + X(s) X(s) + Z²+(aq) → X²+(aq) + Z(s) A. X>Y>Z B. Y > X > Z C. Z > Y > X D. Y > Z > X E. X > Z > Y Correct Answer: Option B – Y > X > Z
What quantity of electrons (in mole) is lost when one mole of iron (ll) ions is oxidized to iron (lll) ions?
A. 5 mole B. 4 mole C. 3 mole D. 2 mole E. 1 mole Correct Answer: Option E – 1 moleProducts
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