JAMB - Chemistry (1988 - No. 11)
Which of the following will produce the greatest increase in the rate of the chemical reaction represented by the equation Na2S2O3(aq) + 2HCl(aq) → 2NaCI(aq) + H2O(I) + SO2(g) + S(g)?
A decrease in temperature and an increase in the concentration of the reactants
An increase in the temperature and a decrease in the cocentration of the reactants
An increase in temperature and an increase in the concentration of the reactants
A decrease in the temperature and a decrease in the concentration of the reactants