Question

B. Fill in the blanks.
1. Combustion is the chemical reaction between a combustible substance and
2. Substances that burn are called
substances
3. The minimum temperature at which a combustible substance starts to burn is called its
temperature.
4.
combustion is the combustion that occurs without the help of an external source
of heat.
5. A
flame produced during the burning of a fuel indicates the incomplete combustion
of fuel.
6. The unburnt carbon particles leave the flame in the form of
smoke.​

Answer 1

Answer:

1. oxygen
2. combustible
3. lowest temperature
4. spontaneous combustion
5. carbon gas
6. flame assmoke and soot