Environmental Chemistry MCQs

INTRODUCTION TO ENVIRONMENT

The transition layer above the stratosphere is known as on

  1. Mesopause
  2. Ionosphere
  3. Tropopause
  4. Stratopause

Question Answer: Stratopause

The region of the atmosphere near to the ground or earth surface (1-11 km) is called

  1. Troposphere
  2. Thermosphere
  3. Mesosphere
  4. Stratosphere

Question Answer: Troposphere

Ozone absorbs UV radiation in the range

  1. 10-50 nm
  2. 220-330 nm
  3. 100-200 nm
  4. 50-100 nm

Question Answer: 220-330 nm

The region of the atmosphere at an altitude of 85-90 km)/above the stratopause is called

  1. Thermosphere
  2. Mesosphere
  3. Troposphere
  4. Stratosphere

Question Answer: Mesosphere

Which species is/are present as major part of the mesosphere?

  1. O2, N2
  2. CO2
  3. Ozone
  4. O2, NO2

Question Answer: O2, NO2

Which statements is true with regard to humus?

  1. It is complex and decomposed organic component of soil
  2. It is dark brown in color
  3. It is source of mineral salt
  4. All of these

Question Answer: All of these

Which is/are important components of the environment?

  1. Biotic components
  2. Abiotic components
  3. Energy components
  4. All of these

Question Answer: All of these

Which is/are abiotic components of the environment?

  1. pH of water and soil
  2. Moisture and water levels
  3. Temperature & light intensity
  4. All of these

Question Answer: All of these

Which statements is not related with environmental chemistry?

  1. Study of chemical processes occurring in the environment
  2. Impact of chemicals on the environment
  3. Use of green solvents to produce chemicals
  4. Remedial measures of pollutants

Question Answer: Use of green solvents to produce chemicals

Which is environmental pollutant?

  1. Urban runoff of pollutants washing
  2. Nutrients leaching from agricultural land into water
  3. Heavy metals contamination of land
  4. All of these

Question Answer: All of these

Which biogeochemical cycle is not part of ecosystem?

  1. Carbon cycle
  2. Nitrogen cycle
  3. Oxygen cycle
  4. Potassium cycle

Question Answer: Potassium cycle

Which substance is most abundant of all parts of atmospheric air?

  1. N2
  2. 02
  3. Xe
  4. CO₂

Question Answer: N2

Which of the following is the study of sources, reactions, effects of chemical species in atmosphere?

  1. Environmental chemistry
  2. Industrial ecology
  3. Green chemistry
  4. Biology

Question Answer: Environmental chemistry

Which procedures involved in pollutants analysis?

  1. Atomic absorption spectrophotometry is
  2. LCMS
  3. GC-MS
  4. All of these

Question Answer: All of these

Which statement is not true with respect to hydrolytic cycle?

  1. Water covers about 71% of the earth’s surface
  2. Water covers about 83% of the earth’s surface
  3. It is the major constituent of the lithosphere
  4. It is essential requirement of all the organisms

Question Answer: Water covers about 83% of the earth’s surface

Dispersion of microscopic particles in a gaseous medium is called aerosols. Which is/are aerosol?

  1. Mist
  2. Cloud
  3. Smoke
  4. All of these

Question Answer: All of these

Which is an important aspect of industrial ecology?

  1. Minimizing liquid waste
  2. Minimizing air emissions
  3. Designing for energy efficiency
  4. All of these

Question Answer: All of these

Which statements is not true with regard to contaminant?

  1. It is undesirable substance
  2. It is not toxic to environment
  3. It is introduced by anthropogenic activity
  4. It is physical or chemical agent

Question Answer: It is not toxic to environment

Which statements is not true with regard to pollutant?

  1. It is physical or chemical agent
  2. It is desirable substance
  3. It is introduced by anthropogenic activity
  4. It is toxic to environment

Question Answer: It is desirable substance

Which statements is true with regard to effluent?

  1. It is waste liquid discharged from industry
  2. It is untreated sewage liquid
  3. It is a treated sewage liquid
  4. All of these

Question Answer: All of these

Which is/are biotic of components of the environment?

  1. Microorganisms
  2. Plants & Animals
  3. Human beings
  4. All of these

Question Answer: All of these

The earth’s crust consisting of soil and rocks is called

  1. Atmosphere
  2. Hydrosphere
  3. Lithosphere
  4. Biosphere

Question Answer: Lithosphere

Which gases occur as in trace amount in the atmosphere?

  1. Ne, He, Kr
  2. H2, SO2, O2
  3. CH4, N2O, CO
  4. All of these

Question Answer: All of these

Which statements is true t with regard to atmosphere?

  1. The atmosphere protects us from the harmful radiations
  2. It provides carbon dioxide for photosynthesis
  3. It provides life sustaining oxygen
  4. All of these

Question Answer: All of these

Which statements is not true with regard to atmosphere?

  1. It is the medium of the carriage of water from ocean to land
  2. It plays major role in maintaining the heat balance of earth
  3. It allows only radiations in the range of 300-2500 nm
  4. It screens the UV radiation of above 300

Question Answer: It screens the UV radiation of above 300

Which is component of the ecosystem?

  1. Inorganic substances
  2. Animals and plants only
  3. Organic substances
  4. All of these

Question Answer: All of these

Which energy is trapped by the autotrophic organisms?

  1. Radiant energy
  2. Electrical energy
  3. Mechanical energy
  4. Vibrational energy

Question Answer: Radiant energy

In biological ecosystem, which substance is used by organisms?

  1. Water
  2. Minerals
  3. Sunlight
  4. All of these

Question Answer: All of these

The study of reduction of pollution using different principles is called

  1. Industrial ecology
  2. Green chemistry
  3. Environmental chemistry
  4. Biology

Question Answer: Green chemistry

Which abiotic component(s) vary with altitude?

  1. Air density
  2. Temperature
  3. Pressure
  4. All of these

Question Answer: All of these

The temperature range of the troposphere is

  1. 15 to 0°C
  2. 15 to -56°C
  3. 15 to -20°C
  4. 15 to -10°C

Question Answer: 15 to -56°C

Which statements is not true regarding earth’s radiation balance?

  1. The earth absorbs about 34 % of solar
  2. The earth spectrum represents a pack of about 10,000 nm (IR)
  3. Light radiation of 483 nm (peak) are incident on earth’s surface
  4. The earth reflects and scatters back about 34% of solar flux (albedo).

Question Answer: The earth absorbs about 34 % of solar

Select the physical characteristics of the atmosphere?

  1. Pressure and thickness
  2. Density and mass
  3. Temperature and speed
  4. All of these

Question Answer: All of these

Which statements is not true regarding temperature inversion?

  1. Temperature of the atmosphere increases with altitude
  2. Cool air underlies warmer air at high altitude
  3. Temperature of the atmosphere decreases with altitude
  4. It may result from the invasion of sea by a cooler breeze

Question Answer: Temperature of the atmosphere decreases with altitude

Which of the following is the cause of environmental pollution?

  1. Transportation
  2. Agricultural activities
  3. Industries
  4. All of these

Question Answer: All of these

  1. Which species is/are present as major part of the troposphere?
  2. H₂O
  3. CO2
  4. O2, N2
  5. All of these

Question Answer: All of these

The temperature of the troposphere falls off uniformly with increasing altitude. The cold layer (-56°C) at the top is known as

  1. Mesopause
  2. Tropopause
  3. Stratopause
  4. Ionosphere

Question Answer: Tropopause

The region of the atmosphere above the ground or earth surface (11-50 km)/above the tropopause is called

  1. Stratosphere
  2. Troposphere
  3. Mesosphere
  4. Thermosphere

Question Answer: Stratosphere

Which species is/are present as major part of the stratosphere?

  1. O₂, N₂
  2. Ozone
  3. H₂O
  4. CO₂

Question Answer: Ozone

The temperature range of the stratosphere

  1. -56 to -2°C
  2. -56 to -10°C
  3. -56 to 0°C

D.-56 to -30°C

Question Answer:.-56 to -2°C

The temperature range of the mesosphere is

  1. 2 to -2°C
  2. -2 to 92°C
  3. -2 to 92°C
  4. 2 to -30°C

Question Answer: -2 to 92°C

The region of the atmosphere at an altitude of 85-500 km)/above the mesopause is called

  1. Stratosphere
  2. Troposphere
  3. Mesosphere
  4. Thermosphere

Question Answer: Thermosphere

region of the atmosphere from 50-100 km is called

  1. Ionosphere
  2. Thermosphere
  3. Mesosphere
  4. Stratosphere

Question Answer: Ionosphere

Which species is/are present as major part of the ionosphere/thermosphere?

  1. O2, N2
  2. Ozone
  3. O₂+, NO+, O+
  4. CO2

Question Answer: Ozone

The component of the environment consisting of all surface and ground water resources is called

  1. Lithosphere
  2. Biosphere
  3. Atmosphere
  4. Hydrosphere

Question Answer: Hydrosphere

The component of the environment encircling the earth’s surface where life exists is called

  1. Lithosphere
  2. Biosphere
  3. Atmosphere
  4. Hydrosphere

Question Answer: Biosphere

The component of the environment consisting of a mixture of gases which acts as a protective blanket surrounding the earth is called

  1. Lithosphere
  2. Hydrosphere
  3. Biosphere
  4. Atmosphere

Question Answer: Atmosphere

The range of the atmosphere above the earth surface is

  1. It extends up to 100 km
  2. It extends up to 500 km
  3. It extends up to 200 km
  4. None of these

Question Answer: It extends up to 500 km

The average concentration of CO2 (% by volume) in the atmosphere is

  1. 0.032
  2. 0.022
  3. 0.012
  4. None of these

Question Answer: 0.032

Which of the following is the science of the relationship of all the organisms to their environment?

  1. Biology
  2. Ecology
  3. Environmental chemistry
  4. Botany

Question Answer: Ecology

Which statement/s is not related with industrial ecology?

  1. Study of interactions between human activities and its environment
  2. Optimization of total industrial materials
  3. Industrial impacts on the environment
  4. Economic systems are viewed in isolation from their surroundings

Question Answer: Economic systems are viewed in isolation from their surroundings

Which practice is involved in getting back nitrogen into atmosphere?

  1. Nitrification
  2. Denitrification
  3. Ammonification
  4. All of these

Question Answer: All of these

Which is/are true regarding energy components of the environment?

  1. They are involved in abiotic components
  2. They are involved in biotic components
  3. They are involved in interaction between biotic and abiotic components
  4. All of these

Question Answer: All of these

Which is/are components of the environment?

  1. Atmosphere
  2. Hydrosphere
  3. Lithosphere
  4. All of these

Question Answer: All of these

The transition layer above the mesosphere is known as

  1. Stratopause
  2. Mesopause
  3. Tropopause
  4. Ionosphere

Question Answer: Mesopause

More Environmental Chemistry MCQs

  1. AIR POLLUTION MCQs
  2. MCQs on Water Pollution and Noise Pollution
  3. Environmental Chemistry MCQs
  4. CHEMISTRY MCQs From all subjects of  Chemistry

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