Chemistry JAMB - Page 92 of 160

What happens to the equilibrium constant of the reaction below if the temperature is increased?

2H2(g) + O2(g) → 2H2O(g) ΔH = -ve A. it is unaffected B. it becomes zero C. it decreases D. it increases Correct Answer: Option C – it decreases

In the preparation of oxygen by heating KClO3 in the presence of MnO2; only moderate heat is needed because the catalyst acts by?

by Sunday | Oct 11 | Chemistry JAMB

A. lowering the pressure of the reaction B. increasing the surface area of the reactant C. increase the rate of the reaction D. lowering the energy barrier of the reaction Correct Answer: Option D – lowering the energy barrier of the...

If a reaction is exothermic and there is a great disorder, it means that?

by Sunday | Oct 11 | Chemistry JAMB

A. the reaction is static B. the reaction is in a state of equilibrium C. there will be a large increase in free energy D. there will be a large decrease in free energy Correct Answer: Option D – there will be a large decrease in free...

In which of the following is the entropy change positive?

by Sunday | Oct 11 | Chemistry JAMB

A. Thermal dissociation of ammonium chloride B. Reaction between an acid and a base C. Addition of concentrated acid to water D. Dissolution of sodium metal in water Correct Answer: Option A – Thermal dissociation of ammonium...