Coal and Petroleum Worksheet-4
(a) Coal (b) Wood (c) Cow dung (d) Agriculture waste
(a) Bio energy (b) Hydral energy
(c) Wind energy (d) Solar energy
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Coal and Petroleum Worksheet-5
(a) the ignition temperature is brought down by sand
(b) supply of air is cut off
(c) sand is a bad conductor of heat
(d) all of these
(a) fuel (b) air (c) heat (d) all of these
(a) lighter than water and soluble in it
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(a) CO (b) CO2
(c) Oxides of nitrogen (d) Lead compounds
(a) light and compact (b) high calorific value
(c) should burn rapidly (d) all of these
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