Environmental Issues Additional Practice Test

12th Standard Zoology — Environmental Issues: Additional Online Practice Test

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Which of the following is classified as a slowly degradable or persistent pollutant that remains unchanged in the environment for decades?

A.Domestic sewage B.Vegetable waste C.DDT D.Mercury

Which mobile application provides hourly updates on the National Air Quality Index (AQI) published by the Central Pollution Control Board (CPCB)?

A.Sameer B.Sameep C.Swachh D.Vayu

What are the components of the acidic precipitation commonly known as acid rain?

A.Hydrochloric acid and carbonic acid B.Sulphuric acid and nitric acid C.Phosphoric acid and acetic acid D.Citric acid and lactic acid

In which year was the National River Conservation Plan (NRCP) enacted to improve the water quality of major fresh water resources in India?

A.1974 B.1986 C.1995 D.2000

According to the Noise Pollution (Regulation and Control) Rules, 2000, what is the permissible limit of noise in areas categorized as commercial during the day?

A.55 dB B.65 dB C.75 dB D.120 dB

In an aquatic food chain exhibiting biomagnification of DDT, if the water contains 0.003 ppb of DDT, what is the typical concentration found in fish-eating birds?

A.0.04 ppm B.0.5 ppm C.2 ppm D.25 ppm

What is the name of the cold, clear, and nutrient-poor initial stage of a lake's natural aging process?

A.Oligotrophic stage B.Mesotrophic stage C.Eutrophic stage D.Senescent stage

Which gas is produced in anaerobic sludge digesters during the treatment of sewage and forms a key component of biogas?

A.Nitrogen dioxide B.Methane C.Oxygen D.Chlorofluorocarbon

Which decentralized wastewater recycling system has been experimented with at Auroville in South India to recycle wastewater naturally?

A.RZWT B.DEWATS C.NRCP D.CPCB

Q10

The celebrated agricultural scientist and environmental activist G. Nammalvar founded Vaanagam, also known as the Global Food Security Trust, at which district in Tamil Nadu?

A.Pudukottai B.Karur C.Chennai D.Coimbatore

Q11

For which scientific research did the Indian soil biologist Dr. Sultan Ahmed Ismail receive a Doctor of Science (D.Sc.) degree from the University of Madras?

A.Photochemical smog secondary pollutants B.Radioactive waste vitrification in dry cement caskets C.Role of earthworms in soil ecology and waste management D.Biomagnification of heavy metals in food chains

Q12

Which method of radioactive waste management involves encasing long-lived nuclear waste in dry cement caskets to prevent reaction and degradation?

A.Delay and decay B.Vitrification C.Source segregation D.Dilute and disperse

Q13

In personal computers, which toxic metal is most commonly associated with the cathode ray tube (CRT) and soldering compounds?

A.Lead B.Mercury C.Cobalt D.Cadmium

Q14

Which secondary pollutant is found in photochemical smog, is thermally unstable, and decomposes to cause severe eye irritation?

A.Carbon monoxide B.Peroxyacetyl nitrate C.Sulphur dioxide D.Methyl guanosine

Q15

Which eco-friendly toilet design is used in parts of India and Sri Lanka to recycle nutrients from human excreta to create fertilizer for agriculture?

A.DEWATS B.RZWT C.EcoSan D.Sameer

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About this Environmental Issues test

This free online practice test covers Environmental Issues from the 12th Standard Zoology (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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