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State three ways by which carbon dioxide gas is added into the atmosphere.
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....................... 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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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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Explain the reducing action of carbon monoxide.
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Write two remedies for carbon monoxide poisoning.
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Tick the most appropriate answer.
Each molecule of Buckminster fulierene contains 60 atoms of carbon arranged as balls consisting of 12 pentagons and
a. 20 hexagons
b. 30 hexagons
c. 40 hexagons
d. 50 hexagons
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Tick the most appropriate answer.
Carbon has a great affinity for
a. sulphur
b. nitrogen
c. oxygen
d. none of these
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Carbon atom has ................... electrons in its valence shell.
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.................... is the main gaseous compound of carbon.
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..................... is used as a pigment and colouring matter in ink and shoe polish.
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Carbon when heated in limited supply of air forms..................
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Organic compounds have ........ boiling and melting points.
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.................. are the compounds of hydrogen and carbon only.
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Natural gas is an important ............. fuel.
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TRUE \ FALSE
Organic compounds are soluble in water.
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