Free Environmental Health practice for NEET PG and INI-CET Community Medicine, with a written explanation on every question.
8 questions · Free explanations
Showing 1–8 of 8 questions
Q1 · Water Disinfection
NEET PGEasyExplanation
Chlorination is the standard method for large-scale water disinfection, being cheap, effective and leaving a residual to guard against recontamination. Alum is a coagulant used before filtration, not a disinfectant.
Q2 · Residual Chlorine
MediumExplanation
A free residual chlorine of about 0.5 mg/L after roughly 30 minutes of contact indicates adequate disinfection and a safety margin against recontamination. Confirm the exact figure against current standards.
Q3 · Fluoride
NEET PGMediumExplanation
Excess fluoride, above about 1.5 mg/L, causes dental fluorosis or mottling and, at higher chronic levels, skeletal fluorosis. Too little fluoride conversely increases dental caries risk.
Q4 · Indicator Organism
NEET PGMediumExplanation
Escherichia coli is the preferred indicator of recent faecal contamination of water, as its presence signals possible enteric pathogens. Coliform counts are used routinely to assess water safety.
Q5 · Air Pollution
HardExplanation
Fine particulate matter, PM2.5, penetrates deep into the alveoli and can enter the bloodstream, causing respiratory and cardiovascular disease. Its small size makes it more hazardous than larger PM10 particles.
Q6 · Biomedical Waste
MediumExplanation
Under biomedical waste rules, sharps go into white translucent puncture-proof containers. Yellow is for anatomical and infectious waste, red for contaminated recyclable plastics and blue for glassware. Confirm against current rules.
Q7 · Housefly-borne Disease
EasyExplanation
The housefly mechanically transmits faecal-oral diseases such as typhoid, cholera and other diarrhoeal illnesses by carrying pathogens on its body and in its excreta. Sanitation and fly control break this route.
Q8 · Pasteurisation
HardExplanation
Pasteurisation destroys pathogenic vegetative bacteria in milk, including Mycobacterium tuberculosis, Brucella and Salmonella, while preserving quality. It does not sterilise, as heat-resistant spores survive.
Environmental Health sits within Community Medicine, which carries the same syllabus in both exams. This set runs to 8 questions, each tagged Easy, Medium or Hard, 2 of them at Hard, and 3 drawn from previous-year papers.
Answer first, then read the explanation even on the ones you got right — the reasoning is where Environmental Health marks are actually won, and it is what separates a recalled fact from a question you can solve in a new form. Once the Easy set feels comfortable, filter to Hard to find the gaps Community Medicine examiners keep returning to.
FAQ
Yes. Every question and explanation in this Environmental Health set is free and open — no login, no form and no payment. The explanation appears the moment you answer.
Environmental Health sits within Community Medicine, which appears in the same form in both syllabuses. Biostatistics, epidemiology and the national health programmes. Numbers-heavy, and among the most predictable scoring areas in the paper.
No. No account, no password, no OTP. Answer in the browser and your answers stay on your device for the session.