Which element conducts electricity?

1
CHEMISTRY DEPARTMENT WAID ACADEMY
Standard Grade Topic 7
2
Which element conducts electricity?

• Sulphur.
• Iodine
• Phosphorus
• Carbon

3
Which substance conducts electricity in the
solid state?

• Copper sulphate
• Glucose
• Zinc
• Silicon

4
Which substance conducts electricity by allowing
a flow of electrons through it.

• Copper
• Solid copper sulphate
• Copper sulphate solution
• Glucose solution

5
Which substance conducts electricity by allowing
a flow of ions through it.

• Copper
• Solid copper sulphate
• Copper sulphate solution
• Glucose solution

6
Which ion has same electron arrangement as an
argon atom?

• Na
• S2-
• F-
• Al3

7
Which compound shown is an ionic compound with
the formula of the type X2Y3?

• Aluminium oxide
• Sodium oxide
• Calcium fluoride
• Calcium carbide

8
Which line shows the correct properties of an
ionic compound?

• Conduct when molten high melting point.
• Conduct when solid low melting point.
• Conduct when solid and high melting point.
• 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?

• Cu(s) ? Cu2(aq) 2e-
• 2Cl-(aq) ? Cl2(g) 2e-
• Cl2(g) 2e- ? 2Cl-(aq)
• Cu2(aq) 2e- ? Cu(s)

10
The bonding and structure of sodium chloride is?

• Covalent molecular
• Covalent network
• Metallic network
• Ionic network

11
The bonding and structure in diamond is?

• Covalent molecular
• Covalent network
• Metallic network
• Ionic network