'Leachate' from a solid waste landfill is harmful because:
Choose the correct answer
It is only rainwater runoff
Contains high BOD, heavy metals, ammonia — contaminates groundwater and surface water if not contained
It releases SO2 gas only
It is non-toxic and can be directly discharged
Correct Answer
B. Contains high BOD, heavy metals, ammonia — contaminates groundwater and surface water if not contained
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Leachate: liquid formed when water percolates through buried waste and dissolves soluble, toxic, and organic compounds. Characteristics: high BOD (10,000–50,000 mg/L), heavy metals (Pb, Cd, Cr), ammonia, organic micropollutants. Contaminates groundwater and surface water if not collected. Sanitary landfills use: clay+HDPE liner + leachate collection pipes + treatment (SBR or MBR + reverse osmosis).
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.