PDF chapter test TRY NOW
Answer the following questions in a short sentences:
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 oxygen to give off heat is called .
(b). Wood, paper, CNG are substances.
(c). The lowest temperature at which a substance catches fire is called its temperature.
(d). Ignition temperature of is lower than that of wood.
(e). The substances which have very low temperature and can easily catch fire with a flame are called substances.
(f). The amount of heat energy produced on complete combustion of 1kg of a fuel is called its .
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