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Fill in the blanks : (a) ______________is formed when wood is burnt in a limited supply of air. (b) Coal is a _______________ form of carbon. (c) __________________ is the most inferior form of coal. (d) Wood charcoal is a _______________conductor of heat and electricity. (e) __________________is used in making black shoe polish |
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Answer» Fill in the blanks : (a) (b) Coal is a (c) (d) Wood charcoal is a (e) |
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