1. CHEMISTRY DEPARTMENT WAID ACADEMY Standard Grade Topic 10

2. Which of the following is a true statement about a flow of electricity along a metal wire? 1.Electricity is a flow of ions along the wire. 2.Electricity is a flow of protons along the wire. 3.Electricity is a flow of electrons along a wire. 4.Electricity is a flow of atoms along the wire. :20

3. Which line shows two types of battery both of which are rechargeable? :20 1.Alkaline batteries and lead/acid batteries 2.Zinc/carbon batteries and alkaline batteries. 3.Zinc/carbon batteries and nickel/cadmium batteries. 4.Lead/acid and nickel/cadmium batteries.

4. A cell can be made by connecting together :30 1.two identical metal plates with water between the plates. 2.two different metal plates with water between the plates. 3.two identical metal plates with an ionic solution between the plates. 4.two different metal plates with an ionic solution between the plates.

5. Batteries require to be replaced due to :25 1.the chemicals being used up. 2.the chemicals being past the sell buy date. 3.the chemicals becoming more concentrated with age. 4.the chemicals reacting with air to form oxides.

6. Which pair of metals would give the highest voltage when made into a cell? :25 1.Magnesium and tin. 2.Magnesium and copper. 3.Aluminium and lead. 4.Zinc and iron.

7. Which pair of metals would give the lowest voltage when made into a cell? :25 1.Magnesium and tin. 2.Magnesium and silver. 3.Aluminium and tin. 4.Zinc and iron.

8. In the cell shown the ammonium chloride solution is called the :25 Ammonium chloride solution 1.electrolyte. 2.electrolysis. 3.electrophorus. 4.electrode.

9. The ion-electron equation shown below is an example of :25 1.zinc ions being reduced to zinc atoms. 2.zinc ions being oxidised to zinc atoms. 3.zinc atoms being reduced to zinc ions. 4.zinc atoms being oxidised to zinc ions.

10. What name is given to the type of reaction shown by the equation below? :25 1.a precipitation reaction.. 2.a displacement reaction. 3.a neutralisation reaction. 4.an oxidation reaction.

11. The purpose of the ion solution between the metal plates in a cell is to :25 1.complete the circuit. 2.keep the plates wet. 3.keep the plates apart. 4.stop the metal plates from corroding.