Environmental Studies · Chemistry

Environmental and Chemical Processes

2,324 Questions

Environmental and chemical processes encompass waste management, pollution remediation, and biogas conversion. These questions evaluate your grasp of how organic and synthetic materials interact with ecosystems. Such topics regularly appear in general science and environmental studies papers.

Waste managementBiogas conversionPhytoremediationSoil washingPollution control

Environmental and Chemical Processes Questions

Multiple choice zoology microbes in human welfare biogas environmental use of microorganism microbes in waste treatment and biogas

Sewage treatment process in which part of decomposer bacteria is recycled into starting of the process is called.

  1. Cyclic treatment

  2. Primary treatment

  3. Tertiary treatment

  4. Activated sludge treatment
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A part of the activated sludge is pumped back into the aeration tank to serve as an inoculum in activated sludge treatment.

Correct answer-D

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

Sum of physical and chemical processes by which living matter is produced and maintained is called as

  1. Respiration

  2. Growth

  3. Metabolism

  4. Reproduction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The chemical processes that occur within a living organism in order to maintain life. There are two main types of metabolic processes namely catabolic and anabolic processes. The catabolic process involves breaking down of material for eg. proteins to amino acids. Whereas the anabolic process involves synthesizing materials for eg. sugars formation from carbon dioxide, water, and oxygen.
Hence correct answer is "metabolism".
Multiple choice chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

What is recycling?

  1. Burning of material

  2. Break down the material by natural process

  3. Recovering and reprocessing the material into useful products

  4. Burying the products in land
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plastic recycling is the process of recovering scrap or waste plastic and reprocessing the material into useful products, sometimes completely different in form from their original state.

Multiple choice chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

The substance which undergoes decomposition by the microbial action is called a:

  1. biodegradable substance

  2. non-biodegradable substance

  3. recyclable substance

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biodegradable substances are those materials or products that are able to naturally break down or decompose without causing any harm to the environment. Biodegradable substances are generally things that are organic in nature. This means they are substances that are made from things that were living at some point. Examples of biodegradable substances include paper which is made from trees, meat products which come from animals and leather products.

Multiple choice chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

Which of the following best describes biodegradation?

  1. A minor change in an organic molecule

  2. Fragmentation of a complex organic molecule

  3. Complete transformation of the organic molecule to mineral forms

  4. All of the above

  5. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A biodegradable substance is the one which gets decomposed by the natural processes. It can be also described by a the minor change in the organic molecule, fragmentation or we can say breaking of the complex molecule or the complete transformation of the organic molecule to the mineral form.

Multiple choice chemistry synthetic fibres and plastics plastic and environment pollution due to plastics environmental impact: plastics

__________  is a bio-degradation process that take organic matter i.e remains of plants,garden and kitchen waste that turn into nutrient-rich food for plants.

  1. Dumping

  2. Incineration

  3. Composting

  4. Sewage treatment
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Composting is a easy and natural bio-degradation process that takes organic matter i.e remains of plants, gardens and kitchen waste that turn into nutrient-rich food for the plants. it is usually used for organic farming by allowing the organic materials to sit in one place for months until microbes decompose it 

Multiple choice solid waste management environmental management biology

Process in which preparation of manure is done from kitchen and food waste with the help of earthworm and other organism 

  1. Composting

  2. Incineration

  3. Vermiculture

  4. All
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vermiculture is another way of preparation of manure from kitchen and food wastes. In this process worms and other similar organism are added to the waste which help in making compost. 

Multiple choice geography human occupations primary economic activities population of india population

Processing and converting raw materials into a finished form is called _____ activity.

  1. Primary

  2. Secondary

  3. Tertiary

  4. Quinary
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Manufacturing and industry sector are known as the secondary sector, includes all branches of human activities that transform raw materials into products or goods.
  •  The secondary sector includes processing of raw materials, food manufacturing, textile manufacturing and industries making finished goods from raw materials.
Multiple choice zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

Which one of the following processes during decomposition is correctly described ? 

  1. Fragmentation - Carried out by organisms such as earthworm

  2. Humification - Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate

  3. Catabolism - Last step in the decomposition under fully anaerobic condition

  4. Leeching - Water soluble inorganic nutrients rise to the top layers of soil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

1. Detritivores (e.g., earthworm) break down detritus into smaller particles through the process of fragmentation.

2. Humification leads to accumulation of a dark coloured amorphous substance called humus that is highly resistant to microbial action and undergoes decomposition at an extremely slow rate.
3. Catabolism is the degradation of detritus into
simpler inorganic substances in aerobic conditions.
4. By the process of leaching, water-soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts.
So, the correct option is 'Fragmentation - Carried out by organisms such as earthworm'.

Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

 What are decomposers?

  1. Decomposers break down the complex organic substances of garbage, dead animals and plants into simpler inorganic substances.

  2. Decomposers synthesise the complex organic substances of garbage, dead animals and plants into simpler inorganic substances.

  3. Decomposers break down the complex inorganic substances of garbage, dead animals and plants into simpler inorganic substances.

  4. Decomposers break down the complex organic substances of garbage, dead animals and plants into simpler organic substances.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Decomposers are organisms that break down dead or decaying organisms and in doing so, carry out the natural process of decomposition. Like herbivores and predators, decomposers are heterotrophic, meaning that they use organic substrates to get their energy, carbon and nutrients for growth and development.

Decomposers and scavengers break down dead plants and animals. They also break down the waste (poop) of other organisms. Decomposers are very important for any ecosystem. If they weren't in the ecosystem, the plants would not get essential nutrients and dead matter and waste would pile up.
Therefore, the correct answer is option A.

Multiple choice botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

The utilization of elements and compounds in nature and their subsequent return to the environment is called

  1. Life cycles

  2. Cyclic pathway

  3. Material cycles

  4. Recycling
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The utilisation of elements and compounds in nature and their subsequent return to the environment is called material cycles. It is also called as a biogeochemical cycle. 
In biology, a life cycle is a series of changes in form that an organism undergoes, returning to the starting state.
Recycle is the conversion of waste into useful forms.
Cyclic pathways tend to use the last product they create to re-begin the cycle. 

So, the correct answer is option C.

Multiple choice botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

The flow of materials from non living components to living components and back to the non living components in a more or less cyclic manner is called as

  1. Gaseous cycle

  2. Sedimentary cycle

  3. Biogeochemical cycle

  4. Hydrologic cycle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A biogeochemical cycle or inorganic-organic cycle is a circulating or repeatable pathway by which either a chemical element or a molecule moves through both biotic (bio-) and abiotic (geo-) compartments of an ecosystem.