Which of the following burns by producing a yellow, luminous flame ?
(a) natural gas (b) coke (c) wax (d) charcoal

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Solution

(c) Wax
Due to incomplete combustion, wax burns by producing a yellow, luminous flame.

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A hard material X which is mined from the earth is used as a household fuel and also for the generation of electricity at Thermal Power Stations. A soft material Y is also used as a fuel in the form of candles. A gaseous material Z which occurs along with petroleum is increasingly being used as a fuel in running vehicles in its compressed form.
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Which of the following burns by producing a yellow, luminous flame ? (a) natural gas (b) coke (c) wax (d) charcoal

(c) Wax Due to incomplete combustion, wax burns by producing a yellow, luminous flame.

Which of the following burns by producing a yellow, luminous flame ?
(a) natural gas (b) coke (c) wax (d) charcoal

(c) Wax
Due to incomplete combustion, wax burns by producing a yellow, luminous flame.