Environmental Studies · Chemistry

Environmental and Chemical Processes

2,261 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
  1. is always flowing

  2. is exposed to the atmosphere

  3. contains salts of calcium and magnesium

  4. contains sodium chloride

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

River water is harder than rain water because it flows over rocks and soil, dissolving minerals like calcium and magnesium salts along the way. Rain water is essentially distilled water before it hits the ground.

Multiple choice
  1. Vermicomposting

  2. Aerobic composting

  3. Windrow composting

  4. Anaerobic composting

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is composting without air. If you just stack your debris in a pile, it will generally compact to the point, where there is no available air, for beneficial organisms to live.

Multiple choice
  1. Circulation

  2. Transpiration

  3. Reproduction

  4. Excretion

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
System
Function
Digestive system
Taking in complex food and using it in simple form by body
Respiratory system
Inhaling and exhaling air and utilizing it to meet energy needs
Circulatory system
Movement of blood to each and every part of body to provide nutrition
Excretory system
Removal of water materials from the body

So it is the respiratory system involved in the inhalation and exhalation of air. Whereas transpiration is loss of water from leaf surface and reproduction is a mode of giving birth to similar ones.

Multiple choice
  1. Conditions are aerobic and temperature 40 deg C

  2. Conditions are anaerobic and temperature 40 deg C

  3. Conditions are aerobic and sewage is supplied

  4. Conditions are anaerobic and sewage is supplies

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogas production is an anaerobic process that is most efficient at thermophilic temperatures, typically around 40 degrees Celsius.

Multiple choice
  1. decomposition

  2. oxidation

  3. substitution

  4. reduction

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chlorine acts as a bleaching agent by releasing oxygen or by reacting with water to form hypochlorous acid, which then oxidizes the colored pigments in materials to make them colorless.

Multiple choice
  1. nitrification

  2. denitrification

  3. nitrogen fixation

  4. ammonification

  5. -

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Denitrification is a microbially facilitated process of nitrate reduction (performed by a large group of heterotrophic facultative anaerobic bacteria) that may ultimately produce molecular nitrogen through a series of intermediate gaseous nitrogen oxide products.