MCQ Chapter 8 General Science Class 8 Maharashtra Board MCQ For All Chapters – General Science Class 8Pollution 1. What is pollution according to the document?Natural changes in the environmentContamination of the natural environment harmful to ecosystemsIncrease in natural resourcesGrowth of human populationQuestion 1 of 202. What is a pollutant as described in the document?A substance that improves ecosystemsA factor affecting natural functions and causing harmful effectsA natural resourceA type of weather phenomenonQuestion 2 of 203. Which of these is a man-made cause of pollution mentioned in the document?Volcanic eruptionIndustrializationDust stormsForest firesQuestion 3 of 204. Why are natural pollutants not always perceived as harmful?They are man-madeThey are destroyed by nature over timeThey are invisibleThey enhance ecosystemsQuestion 4 of 205. What type of pollution is caused by volcanic eruptions?Water pollutionSoil pollutionAir pollutionNoise pollutionQuestion 5 of 206. Which gas is released from burning coal, as per the document?OxygenCarbon monoxideHeliumArgonQuestion 6 of 207. What is a natural source of air pollution mentioned in the document?Industrial smokeForest firesVehicular exhaustAtomic blastsQuestion 7 of 208. What effect does air pollution have on plants?Increased growthSlowing down of photosynthesisEnhanced leaf colorImproved seed productionQuestion 8 of 209. What is the role of the ozone layer according to the document?It traps heatIt protects from ultraviolet raysIt causes acid rainIt increases CO₂ levelsQuestion 9 of 2010. Which gas contributes to the greenhouse effect?NitrogenOxygenCarbon dioxideHydrogenQuestion 10 of 2011. What is a consequence of global warming mentioned in the document?Increased soil fertilityMelting of icebergs and glaciersReduced sea levelsImproved air qualityQuestion 11 of 2012. What forms acid rain?Mixing of oxides of sulphur and nitrogen with rainwaterEvaporation of seawaterBurning of woodDust from cyclonesQuestion 12 of 2013. What is an effect of acid rain on ecosystems?Increased oxygen levelsHarm to aquatic organisms and plantsEnhanced soil fertilityImproved air qualityQuestion 13 of 2014. Which preventive measure for air pollution is suggested in the document?Increased use of pesticidesUse of pollution-controlling machinery in factoriesMore atomic testsBurning of solid wasteQuestion 14 of 2015. What does the Air Quality Index measure?Soil fertilityProportion of pollutants like SO₂ and CO in the airWater purityNoise levelsQuestion 15 of 2016. What defines water pollution in the document?Increase in water volumeWater becoming unclean and harmful due to unwanted materialsDecrease in water temperatureImproved water tasteQuestion 16 of 2017. Which is a biological pollutant of water?SandBacteriaLeadFertilizersQuestion 17 of 2018. What is an inorganic pollutant of water?SewageMercury compoundsPesticidesAlgaeQuestion 18 of 2019. What is a man-made reason for water pollution?Aquatic weedsIndustrial effluentSoil erosionAlgae growthQuestion 19 of 2020. What effect does water pollution have on humans? Improved eyesight Diseases like typhoid Increased energy Better crop growthQuestion 20 of 20 Loading...
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