Class 10 Our Environment CBSE Questions & Answers

Class 10 · Our Environment

Class 10 Our Environment CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which of the following is not the source of air pollution?
  • A
    Pollen grains
  • B
    Dust storm
  • C
    Volcanoes
  • D
    All of these
    Correct
2
“Nitrous oxide is a green house gas” the above statement is-
  • A
    Partially false
  • B
    False
  • C
    Partially true
  • D
    True
    Correct
3
Find the incorrect statement-
  • A
    Soil provides the substratum for plant growth.
  • B
    Soil provides water and minerals for the plant.
  • C
    Soil provides necessary nutrients for plants.
  • D
    Soil provides disease resistant environment for plants.
    Correct
4
Which of the following is not a terrestrial ecosystem
  • A
    Aquarium
    Correct
  • B
    Grassland
  • C
    Forest
  • D
    Desert
5
Which of the following constitute a food chain?
  • A
    Grass, goat and human
    Correct
  • B
    Grass, wheat and mango.
  • C
    Goat, cow and elephant
  • D
    Grass, fish and goat.
6
Which of the following constitutes the forth trophic level?
  • A
    Herbivores
  • B
    Top carnivores
    Correct
  • C
    Small carnivores
  • D
    Plants
7
“Flow of energy is unidirectional”. It means that-
  • A
    Energy always flows form east to west direction.
  • B
    Energy which passes to the higher trophic levels doesn’t come back to lower trophic levels.
    Correct
  • C
    None of these.
  • D
    The energy of the autotrophs reaches back to the solar input.
8
The maximum concentration of chemicals get accumulated in
  • A
    Human body
    Correct
  • B
    Deer
  • C
    Fishes
  • D
    Plants
9
DDT, a pesticide is-
  • A
    Dichloro diphenyl trichloroethane
    Correct
  • B
    Dichlero diphenyl trichleroethyne
  • C
    Diphenyl dichlero trichleroethane
  • D
    Diphenyl dichlero trichleroethyne
10
Green house gases are-
  • A
    Traps solar radiations and increase temperature.
    Correct
  • B
    None of these.
  • C
    Green in colour
  • D
    Gases used in house for cooking
11
Which of the following is biodegradable-
  • A
    Plastic
  • B
    Aluminium foil.
  • C
    Paper
    Correct
  • D
    Polythene
12
Montreal protocol became effective in-
  • A
    1992.0
  • B
    1987.0
  • C
    1985.0
  • D
    1989.0
    Correct
13
Ozone depletion has resulted in-
  • A
    More uv radiations on earth
    Correct
  • B
    Warming of earth
  • C
    Less uv radiations on earth
  • D
    Decrease in temperature
14
Micro-organisms belongs to the group of-
  • A
    Decomposers
    Correct
  • B
    Consumers
  • C
    Producers
  • D
    None of the above.
15
Function of an ecosystem involves-
  • A
    None of the above.
  • B
    Nutrient flow only
  • C
    Energy flow and nutrient movement
    Correct
  • D
    Energy flow only.