Question

Fill in the blanks using the words given in the box.ignition, petrol, combustion, calorific value,combustible, inflammable(a) A chemical process in which a substance reacts with oxygento give off heat is called __________.(b) Wood, paper, CNG are __________ substances.(c) The lowest temperature at which a substance catches fire iscalled its __________ temperature.(d) Ignition temperature of __________ is lower than that of wood.(e) The substances which have very low __________ temperatureand can easily catch fire with a flame are called __________substances.(f) The amount of heat energy produced on complete combustionof 1kg of a fuel is called its __________.NCERT Class VIIIScience - Exemplar ProblemsChapter 6. Combustion and Flame

Answer 1

(a) combustion
(b) inflammable
(c) ignition
(d) petrol
(e)combustible
(f) calorific value

Answer 2

a. combustion
b.combustible
c.ignition
d. petrol
e.inflammable
f. calorific value