MCQ Class 8 Science Chapter 4 Combustion and Flame Advertisement MCQ’s For All Chapters – Science Class 8th 1. Which one of the following gases is used in combustion?HydrogenOxygenNitrogenCarbon dioxideYour comments:Question 1 of 152. The burning of LPG is an example ofrapid combustionspontaneous combustionslow combustionexplosionYour comments:Question 2 of 153. A temperature at which the substance burns is calledmeltingboiling temperatureignition temperature evaporationYour comments:Question 3 of 154. Which is non-renewable source of energy’?Natural gasWind energyTidal energyMechanical energyYour comments:Question 4 of 155. Which of the following is not a fossil fuel?CoalPetroleumNatural gas Water gasYour comments:Question 5 of 156. Which gas helps in the process of combustion?Cooking gasNitrogen gasOxygen gasProducer gasYour comments:Question 6 of 157. The amount of heat energy produced on complete combustion of 1 kg of a fuel is calledcalorific valuesignificant valueheat valueinternal energyYour comments:Question 7 of 158. Which zone represents the partial combustion in candle flame?Outer zoneMiddle zoneInner zoneLower zoneYour comments:Question 8 of 159. Burning coal in a closed room will producenitrogen oxidescarbon dioxidecarbon monoxideoxygenYour comments:Question 9 of 1510. Substances which catch fire are calledacidsbasescombustibleburnersYour comments:Question 10 of 1511. Out of these, which is able to control fires?NH3H2CO2F2Your comments:Question 11 of 1512. Which zone of a flame does a goldsmith use for melting gold and silver ?Outer zoneMiddle zoneInner zoneLower zoneYour comments:Question 12 of 1513. Calorific value of a fuel is expressed inkilojoule per kilogramkilojoule per gramjoule per milligramkilojoule per milligramYour comments:Question 13 of 1514. Which is non-combustible substance?WoodPaperIron nailsStrawYour comments:Question 14 of 1515. Acid rain contains mainlyoxygen and nitrogen gasfluorine and chlorine gasmagnesium oxidenitrogen oxide and sulphur dioxideYour comments:Question 15 of 15 Loading...
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