Combustion and Flame MCQ Questions Class 8 Science Chapter 6
NCERT MCQ Questions for Class 8 Science Chapter 6 Combustion and Flame.
Combustion and Flame MCQ Questions with Answers from Class 8 Science
Combustion and Flame MCQ Questions Class 8 Science Chapter 6
Combustion and Flame Multiple Choice Questions with Answers Class 8 Science Chapter 6 PDF is available.
1.) The substances which burn in air are called ____ ?
a) Combustible
b) Non-combustible
Ans. a) Combustible
2.) A chemical process in which a substance reacts with oxygen to give off heat is called ____ ?
a) Rapid combustion
b) Combustion
c) Spontaneous combustion
Ans. b) Combustion
3.) The type of combustion in which a gas burns rapidly and produce heat and light is known as ____ ?
a) Rapid combustion
b) Spontaneous combustion
Ans. a) Rapid combustion
4.) The type of combustion in which a material suddenly bursts into flams , without the application of any apparent cause is called _____ ?
a) Rapid combustion
b) Spontaneous combustion
Ans. b) Spontaneous combustion
5.) _____ is the lowest temperature at which a combustible substance catches fire ?
a) Ignition temperature
b) Room temperature
Ans. a) Ignition temperature
6.) The substances which have very low ignition temperature and can easily catch fire with a flame are called _____ substances ?
a) Combustible
b) Inflammable
Ans. b) Inflammable
7.) ____ is a inflammable substance ?
a) Petrol
b) Coal
Ans. a) Petrol
8.) _____ is a fire extinguisher ?
a) H2O
b) CO2
Ans. b) CO2
9.) ____ is vapourised during burning and form flames ?
a) Kerosene
b) Charcoal
Ans. a) Kerosene
10.) ____ is used as a liquid fuel ?
a) Natural gas
b) Petrol
c) Coal
Ans. b) Petrol
11.) _____ is a solid fuel ?
a) Natural gas
b) Petrol
c) Coal
Ans. c) Coal
12.) Natural gases are _____ fuel ?
a) Solid
b) Gaseous
c) Liquid
Ans. b) Gaseous
In case you are missed :- Previous Chapter MCQ Questions
13.) Calorific value of hydrogen = _____ kJ/kg ?
a) 45000
b) 55000
c) 150000
Ans. c) 150000
14.) Calorific value of LPG = ______ kJ/kg ?
a) 45000
b) 55000
c) 150000
Ans. b) 55000
15.) Cutting of trees leads to _____ ?
a) Global warming
b) Acid rain
c) Deforestation
Ans. c) Deforestation
16.) Increased concentration of CO2 in the air causes _____ ?
a) Global warming
b) Acid rain
c) Deforestation
Ans. a) Global warming
17.) Oxides of sulphur and nitrogen dissolve in rain water and form acids which causes ____ ?
a) Global warming
b) Acid rain
c) Deforestation
Ans. b) Acid rain
18.) Unburnt carbon particles in the air are dangerous pollutants causing _____ ?
a) Global warming
b) Acid rain
c) Respiratory diseases
Ans. c) Respiratory diseases
19.) Incomplete combustion of a fuel gives poisonous ______ gas ?
a) Carbon monoxide
b) Nitrogen dioxide
Ans. a) Carbon monoxide
20.) Fire produced by oil can be controlled by _____ ?
a) H2O
b) CO2
Ans. b) CO2
21.) _____ is a domestic fuel ?
a) LPG
b) Petrol
c) Diesel
Ans. a) LPG
22.) Burning of coal and diesel releases _____ gas ?
a) Nitrogen dioxide
b) Carbon dioxide
c) Sulphur dioxide
Ans. c) Sulphur dioxide
23.) Petrol engines give off gaseous oxides of _____ ?
a) Nitrogen
b) Sulphur
c) Carbon
Ans. a) Nitrogen
24.) _____ burns in air at room temperature ?
a) Phosphorus
b) Stone
c) Glass
Ans. a) Phosphorus
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