CHEMISTRY DEPARTMENT

WAID ACADEMY

Standard Grade

Topic 7

Which element conducts electricity?

25% 25%25%25%1. Sulphur.

2. Iodine

3. Phosphorus

4. Carbon

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Which substance conducts electricity in the solid state?

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25% 25%25%25%

1. Copper sulphate

2. Glucose

3. Zinc

4. Silicon

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

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25% 25%25%25%

1. Copper

2. Solid copper sulphate

3. Copper sulphate solution

4. Glucose solution

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

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25% 25%25%25%

1. Copper

2. Solid copper sulphate

3. Copper sulphate solution

4. Glucose solution

Which ion has same electron arrangement as an argon atom?

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25% 25%25%25%

1. Na+

2. S2-

3. F-

4. Al3+

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

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25% 25%25%25%

1. Aluminium oxide

2. Sodium oxide

3. Calcium fluoride

4. Calcium carbide

Which line shows the correct properties of an ionic compound?

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25% 25%25%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.

The ion-electron equation for the reaction occurring at the positive electrode when copper(II) chloride solution is electrolysed is?

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1. Cu(s) Cu2+(aq) + 2e-

2. 2Cl-(aq) Cl2(g) + 2e-

3. Cl2(g) + 2e- 2Cl-(aq)

4. Cu2+(aq) + 2e- Cu(s)

The bonding and structure of sodium chloride is?25

25% 25%25%25%1. Covalent molecular

2. Covalent network

3. Metallic network

4. Ionic network

The bonding and structure in diamond is?25

25% 25%25%25%1. Covalent molecular

2. Covalent network

3. Metallic network

4. Ionic network