Question 11 MarkAny two effects of fluoride on animals.AnswerWeight loss, reduced milk production, pre mature death etc.View full question & answer→
Question 21 MarkIndustrial PollutantsAnswerLead, mercury, arsenic and fluorides.View full question & answer→
Question 31 MarkAny two hazardous effects when soil pollutions occurs.Answer(i) Soil fertility gets reduced due to increased toxicity in soil.(ii) Microorganisms enter the food chain or water and are consequently reach the humansView full question & answer→
Question 41 MarkIncreasing concentration of various toxic substances along the food chain.AnswerBiomagnificationView full question & answer→
Question 51 MarkName the disease caused by mercury contamination in Japan.AnswerMinamata diseaseView full question & answer→
Question 61 MarkReasons for eutrophication.AnswerThe introduction of nutrients and chemicals through discharge of domestic sewage, agricultural fields, industrial sectors etc.View full question & answer→
Question 71 MarkName two diseases caused by water pollution.AnswerTyphoid, jaundice, dysentery etc.View full question & answer→
Question 81 MarkName two diseases caused by air pollution.AnswerAsthma, Irritation of respiratory diminished lung function.View full question & answer→
Question 91 MarkCauses of river ganga pollution.AnswerUntreated water released from tanneries, industries, power plants and also religious activities.View full question & answer→
Question 101 MarkA gas release due to the composting which is useful but at the same time causes global warming.AnswerMethaneView full question & answer→
Question 111 MarkA harmful substance formed when fog mixes with smoke.AnswerSmogView full question & answer→
Question 121 MarkHarmful gases released by industries and vehicles.AnswerNitrogen dioxide, sulphur dioxide, methane, carbon dioxide and carbon monoxide etc.View full question & answer→
Question 131 MarkThe process of introducing harmful substances in the environment that causes deterioration of the quality of air, water and land.AnswerPollutionView full question & answer→
Question 141 MarkThe title used for a substance which is no longer safe for use.AnswerWasteView full question & answer→
Question 151 MarkAny two effects of waste accumulation.AnswerLand degeneration, pollution of air, water and land.View full question & answer→