The Arrhenius equation expresses the relationship between the speed of a reaction and its?
A. Molecular collision B. Heat of reaction C. Catalyst D. Activation energy Correct Answer: Option D – Activation energy
When H2S is passed into a solution of iron (III) chloride; the solution turns?
A. Pale green B. Pale red C. Brown D. Colourless Correct Answer: Option A – Pale green Explanation A reaction between Iron (iii) chloride and Hydrogen sulphide leads to the reaction 2FeCl3(aq) + H2S(g) → 2FeCl2(aq) + 2HCl(aq) + S(s) The colour change is from...
A decrease in pressure will cause what according to this reaction?
PCl5(g) ↔ PCl3(g) + Cl2(g) A. Decelerate the reaction B. Increase the yield of PCl3 C. Increase the yield of PCl5 D. Accelerate the reaction Correct Answer: Option B – Increase the yield of PCl3
Which of the following equations show that a reaction is in equilibrium?
A. ΔG < O B. ΔG = ΔH – TΔS C. ΔG > O D. ΔG = O Correct Answer: Option D – ΔG = OProducts
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