#1. Which one of the following is not a product of the reaction when chlorine gas is bubbled through cold sodium hydroxide solution?
#2. Which one of the following is not used to soften permanent hardness in water?
Addition of sodium carbonate
#3. The gas produced when chlorine water is left exposed to sun light is;
#4. Which one of the following processes is not applied in water treatment?
#5. Sulphur reacts with concentrated nitric acid to form;
#6. A solution containing copper(II)ions will form.
Blue precipitate soluble with excess sodium hydroxide solution
Brown solid and green solution with iron fillings
Blue precipirate insoluble in excess ammonia.
Green precipitate with ammonia solution
#7. Which of the following is the best explanation for reducing the size of reactant particles in a chemical reaction?
Increase the area of contact between reactants
Reduce the activation energy
Decrease the kinetic energy
Increase the amount of reactants
#8. Element X burns in excess oxygen to form a yellow solid which dissolved in water to produce a colourless gas that is neutral to litmus and relights a glowing splint. Element X is;
#9. Which of the following polymers cause environmental pollution?
#10. When 2.78g of a hydrated salt was heated, 1.52g of the anhydrous salt was formed. Which one of the following is the percentage of water of crystallization?
#11. An element P is immediately below iodine in group VII of the periodic table. Which one of the following properties is for element P.
Forms covalent compounds with group I elements
Would be displaced from its salts by bromine
Exists as a liquid at room temperature