Class 6 Air Around Us CBSE Questions & Answers

Class 6 · Air Around Us

This is Science Class 6 Air around Us CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which gas occupies four-fifth of volume of dry air?
  • A
    Carbon dioxide
  • B
    Helium
  • C
    Nitrogen
    Correct
  • D
    0xygen
2
Nitrogen and helium gas is used to fill the bulbs and tubes because they are
  • A
    Reacts with filaments
  • B
    Very active
  • C
    Do not reacts with filament
  • D
    Very inert
    Correct
3
Which gas is produced on burning of fossil fuels?
  • A
    Sulpher dioxide
  • B
    Nitrogen
  • C
    Carbon dioxide
    Correct
  • D
    Oxygen
4
Liquid oxygen is used in rockets for
  • A
    All of these
  • B
    Preventing combustion
  • C
    Providing energy
  • D
    Combustion of fuels
    Correct
5
Which of the following do not carry oxygen cylinder with them?
  • A
    Aeroplane passengers
    Correct
  • B
    Sea-divers
  • C
    Astronaut
  • D
    Mountaineers
6
Through which of the following parts of leaves plants take oxygen?
  • A
    Petiole
  • B
    Stomata
    Correct
  • C
    Midribs
  • D
    Leaves tip
7
Carbon dioxide is released during
  • A
    Transpiration
  • B
    Combustion of fossil fuels
    Correct
  • C
    Photosynthesis
  • D
    Regeneration
8
During photosynthesis, green leaves absorbs
  • A
    Sulpher dioxide
  • B
    Oxygen
  • C
    Carbon dioxide gas
    Correct
  • D
    Carbon monoxide
9
A gas used for wielding purpose is
  • A
    Oxygen
    Correct
  • B
    None of these
  • C
    Carbon dioxide
  • D
    Nitrogen
10
Water vapour in air comes from
  • A
    Vaporization and evaporation
    Correct
  • B
    Precipitation and evaporation
  • C
    Respiration and combustion
  • D
    Combustion and respiration
11
Traffic police at crossing wears mask because there is
  • A
    Lots of oxygen and nitrogen
  • B
    Lots of people
  • C
    Lots of dust and poisonous gases
    Correct
  • D
    Lots of plants
12
Which of the following device should be used to prevent inhaling dusts and harmful gases?
  • A
    Air filter
  • B
    Mask
    Correct
  • C
    Refrigerator
  • D
    Cooler
13
Sufficient air for breathing is present up to height of about
  • A
    15 km
    Correct
  • B
    35 km
  • C
    05 km
  • D
    25 km
14
In which layer of atmosphere clouds are formed?
  • A
    Stratosphere
  • B
    Mesosphere
  • C
    Ionosphere
  • D
    Troposphere
    Correct
15
A person should carry oxygen cylinder when going to
  • A
    Banglore
  • B
    Mount Everest
    Correct
  • C
    Nanital
  • D
    Delhi