UGC NET Environmental Science Mock - 3 - UGC NET MCQ

Acid rain is a mixture of wet and dry materials coming from atmosphere which is caused by chemical reaction of sulfur dioxide (SO₂) and nitrogen oxides (NO_x) which rises high in atmosphere which mix and react with water, oxygen and chemicals to form acidic pollutants,
so option D is correct.

Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants, aquatic animals, and infrastructure. Acid rain is caused by emissions of sulphur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.

The Nuclear waste that is left out as a result of burning of radioactive materials to produce the nuclear energy. The waste as a by-product is massive and need to be disposed off as it keeps emitting radiations even after the disposal.

The best way to dispose of such wastes are the underground mines or any other such geological formations from which the harmful nuclear radiations don’t come out.

So, the answer is A.

The Deccan Thorn Forests cover the arid region extending across Maharashtra, Tamil Nadu, Andhra Pradesh, Karnataka and Telangana.

Anaerobic Method
Bangalore Method
This method was developed by L.N Acharya (1939) at IISc Bangalore. This method overcome many of the disadvantages of Indore method. Method is allowed to decompose for 4-6 months.
Aerobic Method
Indore Method
In the Indore method of composting, organic waste are spread in the cattle shed to serve as bedding. Layering process continued for about a fortnight. A thin layer of well decomposed compost is sprinkled over top and the heap given a turning and reformed.

Hence, The correct answer is B.

The process of accessing information on CD ROM is random. Random access minimizes the data access time. It helps in fast retrieval of related data items in a database. In a random access drive, the data and files are not stored in any specific order.

Hence, The correct answer is B.

Thesaurus

Hence, The correct answer is D.

Performance appraisal

Hence, The correct answer is B.

The mean is the average of a data set. The mode is the most common number in a data set. The median is the middle of the set of numbers.

The cloth area required
(20m³/secx60s/min)
-------------------  = 240 m²
5.0m/min

The surface area of one bag
= πDH = π × 0.4 × 8 = 10.053 m²

Total number of bags
   240
--------- = 23.87 ≈ 24 bags
 10.053

Hence, The correct answer is A.

The calculations indicate that 24 bags are required based on the given dimensions and air flow rate. However, for a continuously cleaned operation, an extra bag is needed as a standby during the cleaning cycle. This brings the total to 25 bags.

SCIRUS

Hence, The correct answer is C.

Feedback mechanism is a part of SDI service.

Hence, The correct answer is D.

The animals listed in Schedule 1 and part II of Schedule 2  of Wildlife Protection Act have absolute protection. Offences under these schedules are prescribed the highest penalties. It was enacted on (9th September, 1972).

Hence option C is correct.

On June 4, 1963, less than a year after the controversial environmental classic “Silent Spring” was published, its author, Rachel Carson, testified before a Senate subcommittee on pesticides. She was 56 and dying of breast cancer.

Hence option C is correct.

IUCN aims to provide scientific data at a global level on the status of species and subspecies. It aims to address the factors of concern and spread awareness about the species and biodiversity extinction. It also plans a layout for the conservation of biodiversity.

Hence option D is correct

Occupational hazard to the miners is called black lung.

Coal workers' pneumoconiosis (CWP), also known as black lung disease or black lung, is caused by long-term exposure to coal dust. It is common in coal miners and others who work with coal. It is similar to both silicosis from inhaling silica dust and asbestos dust.

Hence option A is correct.

his range is characteristic of the temperate zones or middle latitudes, where you experience moderate temperatures with distinct seasonal variations. It effectively represents the area between the subtropical and polar regions.

Hence option D is correct

Most harmful environmental pollutants are non-biodegradable chemicals.

These dangerous pollutants are known as the criteria pollutants, and include ozone, particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and lead.

Hence option C is correct.

Those gas molecules in the Earth's atmosphere with three or more atoms are called "greenhouse gases" because they can capture outgoing infrared energy from the Earth, thereby warming the planet. The greenhouse gases include water vapor with three atoms (H₂O), ozone (O₃), carbon dioxide (CO₂), and methane (CH₄).
Hence option A is the correct answer.

Continuous and Comprehensive Evaluation (CCE) refers to all-around development including both scholastic and co-scholastic aspects of a child's growth.

• CCE has been introduced as a school-based system of evaluation by the CBSE in 2009 with the enactment of the 'Right to Education Act'.
• CCE has been introduced as a school-based system of evaluation by the CBSE in 2009 with the enactment of the Right to Education Act.
• The objective of CCE is to make evaluation an integral part of learning through diagnostic and remedial teaching.
• It never assesses students according to their economic status rather it emphasizes the continuity of assessment.

Hence option B is the correct answer.

The global temperature has risen by about 8 degree celsius, since the peak of last glacialisation.

Hence option C is the correct answer.

EVS class helps children to develop desirable attitudes, values, and behaviour pattern necessary for an environment-friendly lifestyle.

The active participation and involvement of children play a very vital role in learning and shaping the personality of a child.

Individual Experiences of Children in an EVS Class will Benefit the Teacher:-

• To connect the subject to the learners' experiential world
• Promote reflection and learning
• To explore different ideas
• Help in the assessment of students
• Enhancing individual knowledge and skills
• Increase confidence and motivation in children

Hence option C is the correct answer.

Coral reef in India found at Lakshadweep island,Gulf of Kutch,Gulf of Mannar and Andaman Islands, marine species and creatures like Dolphins, Sea-horse, Sea-cucumber, Sea-anemone,Dugong and sea turtle are the few wild animals of coral reefs found in India.

Hence option B is the correct answer.

This is radiative equilibrium, energy balance. The temperature at which this occurs is about 0 F. That is called the temperature of radiative equilibrium. You might remember this is the figure for global annual average surface temperature on the earth without the greenhouse effect.

Hence. The correct answer is A.

Without this greenhouse effect, the average surface temperature would be 255 degrees kelvin (-18 degrees Celsius or 0 degrees Fahrenheit); a temperature so low that all water on Earth would freeze, the oceans would turn into ice and life, as we know it, would not exist.

Hence. The correct answer is B.

Biodiversity increases towards the equator.

Hence. The correct answer is A.

A change of one degree on the Celsius scale is larger than a change of one degree on the Fahrenheit scale.

Hence. The correct answer is B.

A film or layer of oil floating on an expanse of water.

Hence. The correct answer is C.

The relative humidity is a measure of the air's actual water vapour content this statement is incorrect.

Hence. The correct answer is C.

Lake stratification is the separation of lakes into three layers: Epilimnion: the top of the lake. Metalimnion (or thermocline): the middle layer, which may change depth throughout the day. Hypolimnion: the bottom layer.

Hence. The correct answer is B.