Environmental Chemistry CBSE Questions & Answers

Environmental Chemistry

This is Chemistry Class 11 Environmental Chemistry CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
In cold places, vegetables, fruits and flowers are grown in glass covered areas called green houses. This is because of one or more of the following. Choose the most appropriate.
  • A
    it maintains the temperature
  • B
    it maintains the temperature as well as traps the solar energy
    Correct
  • C
    It absorbs the infrared radiation
  • D
    it traps the solar energy
2
Green plants help reduce environmental pollution by
  • A
    removing the excess of nitrogendioxide
  • B
    removing the excess of carbondioxide
    Correct
  • C
    removing the excess of carbonmonoxide
  • D
    removing the excess of sulphurdioxide
3
Deforestation and burning of fossil fuel adds to the environmental pollution
  • A
    results in the production of some unwanted hydrocarbons
  • B
    depletes carbondioxide required by green plants for photosynthesis
  • C
    releasing more decane into the atmosphere
  • D
    increases the \({\text{C}}{{\text{O}}_{\text{2}}}\) level and adds to global warming
    Correct
4
One of the following pollutant gases naturally occurs in the environment
  • A
    nitrogendioxide
  • B
    sulphur trioxide
  • C
    Nitrous oxide
    Correct
  • D
    sulphur dioxide
5
Ozone hole is
  • A
    decrease in ultraviolet radiations
  • B
    the depletion of ozone layer in the stratosphere
    Correct
  • C
    decrease in the greenhouse gases
  • D
    decrease in infrared radiations
6
The gas emitted during volcanic eruptions is
  • A
    hydrogen peroxide
  • B
    carbonmonoxide
  • C
    nitric oxide
  • D
    carbondioxide
    Correct
7
This process in which nutrient enriched water bodies support a dense plant population, which kills animal life by depriving it of oxygen and results in subsequent loss of biodiversity, is called
  • A
    mesosphere effect
  • B
    increase in green house gas
  • C
    troposphere effect
  • D
    Eutrophication
    Correct
8
Measure of the amount of organic material in the water, in terms of how much oxygen will be required to break it down biologically is termed as
  • A
    hydrosphere measure
  • B
    measure of polluted water
  • C
    Biochemical Oxygen Demand (BOD)
    Correct
  • D
    Eutrophication value
9
Recycling of materials and energy will lead to
  • A
    decrease in environmental pollution
    Correct
  • B
    increase in green house gas
  • C
    inssen the trapped solar energy
  • D
    increase in soil pollution
10
Reducing potentially hazardous waste through smarter productions is called
  • A
    metathesis
    Correct
  • B
    green chemistry
  • C
    waste water management
  • D
    green house chemistry
11
Reducing potentially hazardous waste through smarter productions is developed by
  • A
    Chauvin,Gruubs and Schrock
    Correct
  • B
    Chauvin,Watson and Schrock
  • C
    Chauvin,Crick and Schrock
  • D
    Gruubs, Watson and Crick
12
Three elements needed for the healthy growth of plants are
  • A
    N S P
  • B
    N K C
  • C
    N P K
    Correct
  • D
    N Ca P
13
The Earth does not directly provide which of man’s basic needs?
  • A
    Air
  • B
    Food
  • C
    Water
  • D
    Shelter
    Correct
14
Which of these is not released from burning fossil fuels?
  • A
    Nitrogen oxides
  • B
    Carbon dioxide
  • C
    Copper oxide
    Correct
  • D
    Sulphur dioxide
15
Dissolved pollutant gases can form:
  • A
    Ozone
  • B
    Acid rain
    Correct
  • C
    Neutral hail
  • D
    Alkali snow