Please select a subject first
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Give two uses for the following:
sugar charcoal
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How will you collect the gas ?
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Write the balanced chemical equation for the above reaction.
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Write the balanced chemical equations for the preparation of carbon dioxide by:
the action of acetic acid on sodium bicarbonate.
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Write the balanced chemical equations for the preparation of carbon dioxide by:
the action of dilute sulphuric acid on sodium bicarbonate.
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What happens when carbon dioxide is passed through lime water first in small amounts and then in excess ?
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What happens when a baking mixture containing baking powder is heated?
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Give reason for the following:
Soda acid and foam types of fire extinguisher are not used for extinguishing electrical fires.
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Give reason for the following:
Solid carbon dioxide is used for refrigeration of food.
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What is a fire extinguisher ? What is the substance used in the modern type of fire extinguishers ? How is it an improvement over the soda acid-type and the foam-type fire extinguishers ?
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Explain the term ‘green house effect’. How can it be both beneficial and harmful for life on earth ?
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What steps should be taken to balance carbon dioxide in the atmosphere ?
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State three ways by which carbon dioxide gas is added into the atmosphere.
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Fill in the blank
....................... is formed when carbon is burnt in a limited supply of air or oxygen.
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Carbon monoxide burns in air with a ______ flame to form carbon dioxide.
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Fill in the blank:
Carbon monoxide is a products of..................combustion.
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Match the colunm
| column A | column B |
| 1. A product of incomplete burning | a. Hopcolite |
| 2. Nature of carben monoxide | b. Combustible gas |
| 3. A compound formed by the combination of haemoglobin and carbon monoxide | c. carboxy-haemoglobin |
| 4. A mixture of metallic oxides | d. Carbon monoxide |
| 5. Carbon monoxide | e. Highly poisonous |
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How is carbon monoxide gas formed?
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Give two uses of carbon monoxide.
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Why is carbon monoxide called silent killer ?
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