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Shyam was cooking potato curry on a chulha. To his surprise he

observed that the copper vessel was getting blackened from
outside. It may be due to:
(a) proper combustion of fuel.
(b) improper cooking of potato curry.
(c) improper combustion of the fuel.
(d) burning of copper vessel.

Science - Exemplar Problems

Chapter 6. Combustion and Flame


(c) improper combustion of the fuel.........................Is the answer
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The answer is: (a) proper combustion of the fuel.
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