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 soil as a natural resource natural resources - air, water and land land physical resources biology

Laterization is a process that results in the

  1. Degradation of soil

  2. Purification of water

  3. Formation of soil

  4. Sterilization of soil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Laterization is a prolonged process of chemical weathering of rocks leading to the formation of soil. It produces a variation in the thickness, grade, chemistry and ore mineralogy of the rock creating soil particles. Thus the correct answer is option C.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

Define biomass.

  1. Fossil fuels are also called biomass.

  2. The wastes and dead parts of living beings are called biomass.

  3. The wastes from industrial applications are called biomass.

  4. The wastes and dead parts of living beings buried deep inside the earth are called biomass.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The waste and dead parts of living beings is called biomass. Wastes and dead parts of living being buried deep inside the earth turns up into fossil fuels after a long time.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

What is Biomass?

  1. Organic fuel that is used for treatment of wastes.

  2. Organic fuel that is used as a source of energy.

  3. Organic matter that has a large mass.

  4. Waste products from industries.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Organic matter that is obtained from living or dead organisms is called as biomass. Biomass is a renewable source of energy that is used as fuel.

Multiple choice biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

The process of heating the waste at high temperature is called as ________.

  1. Land-filling

  2. Pyrolysis

  3. Decomposing

  4. Incineration
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The scientific method of solid waste management where the waste is heated to high temperature. This process is beneficial for obtaining gas and electricity. The method is suitable for municipal solid waste management.

Multiple choice solid waste and its management conservation of environment

Resource recovery is also known as 

  1. Reuse

  2. Recycle

  3. Reduce

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are different waste management strategies for waste minimization. The aim of the waste management is to obtain the maximum benefits from products and to generate the minimum amount of waste. Resource recovery in the waste management process is a step of converting a waste material into a useful product. It is called as recycling. 

Thus, the correct answer is option B.

Multiple choice solid waste and its management conservation of environment

Processing is a step during waste management which means

  1. Operation to convert a material into a non-biodegradable waste

  2. Operation to convert a material into a useful product

  3. Operation to convert a material into a weedicides

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
There are different waste management strategies for waste minimization. The aim of the waste management is to obtain the maximum benefits from products and to generate the minimum amount of waste. Processing during the waste management process is a step of converting a waste material into a useful product. It is called as recycling. 
Thus, the correct answer is option B.
Multiple choice perfect competition and monopoly market structure and pricing economics

__________ is a process in which various organisms including bacteria and fungi break down organic matter into simpler substances under controlled aerobic conditions.

  1. Segregation

  2. Dumping

  3. Composting

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

Organic waste is broken down by microbes (bacteria) into simpler substances. It is a multi-step process which is closely monitored with measured inputs of water, carbon and nitrogen rich compounds.

Multiple choice perfect competition and monopoly market structure and pricing economics

The composting process is carried out by __________.

  1. Psychrophiles - low-temperature microbes

  2. Mesophiles - medium temperature microbes

  3. Thermophiles - high-temperature microbes

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The three types of bacteria work at different temperatures to decompose the organic matter. Psychrophiles work at lowest temperature, around 55-70 degrees Fahrenheit to break down the organic matter. They give off small heat in the process which is sufficient enough for Mesophilic bacteria to begin composting. They prefer temperatures from 70-100 degrees Fahrenheit and give off heat while decomposing. They die when the temperature goes beyond 100 degrees and this is when thermophiles (heat loving bacteria) begin working.

Multiple choice zoology introduction to microbiology microbial pollution control environmental use of microorganism microbes in waste treatment and biogas

Sewage treatment in which a portion of decomposer bacteria present in waste is recycled into the beginning of the process is

  1. Cyclic treatment

  2. Activated sludge treatment

  3. Primary treatment

  4. Tertiary treatment
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Activated sludge treatment is the step involved in the treatment of sewage water. The sewage is treated in a large aerated tank and bacteria. Once, the process of decomposition is over, the filtrate obtained is called the activated sludge because it contains a high number of bacteria. This is then recycled in the next slot of treatment when the polluted sewage is available for the treatment. The activated sludge speeds up the process of decomposition by acting as an inoculum in the aeration tank. Primary treatment is the removal of large solid particles from the sewage. Tertiary treatment involves chemical treatment of the sewage water.

Hence, the correct answer is 'Activated Sludge treatment'.

Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

Select the correct sequence of the process of paper recycling.

  1. Collection, sorting, pulping, deinking

  2. Collection, pulping, sorting, deinking

  3. Collection, deinking, sorting, pulping

  4. Deinking, sorting, pulping
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Paper, torn clothes and metallic and plastic discards are recyclable wastes. Recycling is processing used materials (waste) into new, useful products. This is done to reduce the use of raw materials that would have been used. Paper recycling is a process wherein, a paper that is used, discarded by the consumer, is collected and transported to paper mills. Here, it is sorted and is mixed with water and chemicals and converted into paper pulp. Deinking is carried out to remove printing ink from the paper fibers from the pulp and transformed into reusable form.

Thus, the correct answer is option A.

Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

The process of conversion of paper material into the slurry substance is called as

  1. Sorting

  2. Shredding

  3. Pulping

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The process of waste paper recycling involves mixing of used paper with water and chemicals to break it down. It is then chopped up and heated, which breaks down the paper further into strands of cellulose, a type of organic plant material. This resulting mixture is called as pulp or slurry. This process is called as pulping. 

Thus, the correct answer is option C.  

Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

Process, container is being emptied into collection vehicles at point of collection is known as:

  1. Hauled Container System

  2. Stationary Container System

  3. Collection System

  4. Pulverization
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a stationary container system, the collection vehicle travels to the site, empties the container, and moves to the next, whereas in a hauled container system, the entire container is removed.

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

A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called as:

  1. primary treatment

  2. activated sludge treatment

  3. tertiary treatment

  4. none of these.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called activated sludge treatment .
So, the correct option is 'activated sludge treatment'