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03/10/2021 9:56 pm
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A hard material X which is mined from the earth is used as 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.
(a) What are materials, X, Y and Z?
(b) When materials X, Y and Z are burned separately :
(i) Which material burns by producing a yellow, luminous flame?
(ii) Which material ultimately burns without producing a flame?
(iii) Which material can burn in a gas stove by producing a blue flame?
1 Answer
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03/10/2021 9:57 pm
(a) X is coal; Y is wax; Z is natural gas
(b)(i) Y (wax)
(ii) X (coal)
(iii) Z (natural gas)