Question

a) Fuels release their energy through a chemical reaction known as
b)
reaction is accompanied by the evolution of heat.
c) The substances which
easily on burning gre flames
d) Changing of solids directly into vapour on heating is called
.) Unburnt carbon particles form
which appears as a dark powder
should never be used in case of an electrical fire​

Answer 1

Answer:

b)

reaction is accompanied by the evolution of heat.

Explanation:

Answer 2

a.)Combustion

b.)Exothermic Reaction

c.)Inflammable substances

d.)Sublimation

.)Ash

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