1. CHEMISTRY DEPARTMENT WAID ACADEMY Standard Grade Topic 7

2. Which element conducts electricity? 1.Sulphur. 2.Iodine 3.Phosphorus 4.Carbon 15

3. Which substance conducts electricity in the solid state? 18 1.Copper sulphate 2.Glucose 3.Zinc 4.Silicon

4. Which substance conducts electricity by allowing a flow of electrons through it. 18 1.Copper 2.Solid copper sulphate 3.Copper sulphate solution 4.Glucose solution

5. Which substance conducts electricity by allowing a flow of ions through it. 18 1.Copper 2.Solid copper sulphate 3.Copper sulphate solution 4.Glucose solution

6. Which ion has same electron arrangement as an argon atom? 25 1.Na + 2.S 2- 3.F - 4.Al 3+

7. Which compound shown is an ionic compound with the formula of the type X 2 Y 3 ? 25 1.Aluminium oxide 2.Sodium oxide 3.Calcium fluoride 4.Calcium carbide

8. Which line shows the correct properties of an ionic compound? 25 1.Conduct when molten & high melting point. 2.Conduct when solid & low melting point. 3.Conduct when solid and high melting point. 4.Conduct when molten and low melting point.

9. The ion-electron equation for the reaction occurring at the positive electrode when copper(II) chloride solution is electrolysed is? 25 1.Cu(s)  Cu 2+ (aq) + 2e - 2.2Cl - (aq)  Cl 2 (g) + 2e - 3.Cl 2 (g) + 2e -  2Cl - (aq) 4.Cu 2+ (aq) + 2e -  Cu(s)

10. The bonding and structure of sodium chloride is? 25 1.Covalent molecular 2. Covalent network 3.Metallic network 4.Ionic network

11. The bonding and structure in diamond is? 25 1.Covalent molecular 2. Covalent network 3.Metallic network 4.Ionic network