Fuels, Combustion and Flame Worksheet-2
(a) Hydrogen (b) Phosphorus
(c) Water (d) Coke
(a) It gets ignited due to the heat of friction.
(b) A combustible substance cannot catch fire below its ignition temperature.
(c) A combustible substance can catch fire below its ignition temperature.
(a) Gases produced in flame are cold
(b) Gases produced in flame are hot
(c) Hot gases are lighter and hence rise up
(a) It forms a blanket around fire
(b) It brings down the temperature of the fuel
(c) Both It forms a blanket around fire & It brings down the temperature of the fuel
(d) None of these
(a) CO2 + H2O (b) CO2 + H2
(c) CO + O2 (d) CO2 + O2 + heat
(a) Reduction (b) Redox
(c) substitution (d) Oxidation
(a) Coke (b) Diamond (c) Coal (d) Wood
(a) minimum temperature (b) maximum temperature
(c) boiling temperature (d) ignition temperature
(a) Extinguished (b) burning brightly
(c) burning dimly (d) burning with smoke
(a) presence of combustible substance
(b) presence of supporter of combustion
(c) attainment of ignition temperature
(d) all of these
Answer Key:
(1)-(a,b); (2)-(a,b); (3)-(b,c); (4)-(a,b); (5)-(a); (6)-(d); (7)-(b); (8)-(d); (9)-(a); (10)-(d)