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CHEMISTRY DEPARTMENT
WAID ACADEMY
Standard Grade
Topic 1
Approximately how many chemical elements are there?
1. About 50.
2. About 80.
3. About 100.
4. About 150. 0%0%0%0%
About 50. About 80. About 100. About 150.
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What is formed when two or more substances come together without reacting?
1. A compound.
2. A mixture.
3. An element.
4. A solution. 0%0%0%0%
A compound. A mixture. An element. A solution.
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Which line shows something that always happens in a chemical reaction?
1. A gas is given off.
2. Heat energy is absorbed.
3. A colour change occurs.
4. A new substance is formed.
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A gas is given off. Heat energy is absorbed.
A colour change occurs. A new substance is formed.
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In a precipitation reaction
1. two solutions are mixed and a gas is given off.
2. two solutions are mixed and there is a colour change.
3. two solutions are mixed and heat energy is given out.
4. two solutions are mixed and an insoluble solid is formed.
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two solutions are mixed and a gas is given off.
two solutions are mixed and there is a colour change.
two solutions are mixed and heat energy is given out.
two solutions are mixed and an insoluble solid is formed.
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Which of following does not show a chemical reaction?
1. A match burning.
2. Water boiling in a kettle.
3. Frying an egg.
4. Glue setting. 0%0%0%0%
A match burning. Water boiling in a kettle.
Frying an egg. Glue setting.
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What is the symbol for caesium?
1. Cs
2. Cu
3. Co
4. Ca 0%0%0%0%
Cs Cu Co Ca
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The name given to a solid which dissolves in a liquid is the
1. solution.
2. solvent.
3. solute.
4. saturate. 0%0%0%0%
solution. solvent. solute. saturate.
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Which elements has the symbol Ca
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Carbon.. Caesium. Californium. Calcium.
1. Carbon..
2. Caesium.
3. Californium.
4. Calcium.
In an exothermic reaction
1. Heat energy is given out.
2. Heat energy is taken in.
3. A gas is given off.
4. A solid is formed. 0%0%0%0%
Heat energy is given out. Heat energy is taken in.
A gas is given off. A solid is formed.
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Which elements are present in sodium carbonate?
1. Carbon and sodium.
2. Sodium and oxygen.
3. Sodium, hydrogen and oxygen.
4. Sodium, carbon and oxygen.
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Carbon and sodium.
Sodium and oxygen.
Sodium, hydrogen and oxygen.
Sodium, carbon and oxygen.
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Which metal gives an orange-red flame colour.(You may wish to refer to page 4 of the data booklet)
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Calcium. Sodium. Copper. Potassium.
1. Calcium.
2. Sodium.
3. Copper.
4. Potassium.
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Which metal was discovered in the year 1775? (You may wish to refer to page 8 of the data booklet)
15Seconds
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Potassium. Magnesium. Zinc.. Calcium.
1. Potassium.
2. Magnesium.
3. Zinc..
4. Calcium.