T2 - Air English Medium Free Online Test 1 Mark Questions 2020-2021

6th Standard

    Reg.No. :
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Science

Time : 00:10:00 Hrs
Total Marks : 5

    Part A

    5 x 1 = 5
  1. ____________ is the percentage of nitrogen in air.

    (a)

    78%

    (b)

    21%

    (c)

    0.03%

    (d)

    1%

  2. Gas exchange takes place in plants using __________

    (a)

    Stomata

    (b)

    Chlorophyll

    (c)

    Leaves

    (d)

    Flowers

  3. The constituent of air that supports combustion is _________________

    (a)

    Nitrogen

    (b)

    carbon-di-oxide

    (c)

    Oxygen

    (d)

    water vapour

  4. Nitrogen is used in the food packaging industry because it ________________

    (a)

    provides colour to the food

    (b)

    provides oxygen to the food

    (c)

    adds proteins and minerals to the food

    (d)

    keeps the food fresh

  5. ______________ and ________________ are the two gases, which when taken together, make up about 99 percentage of air.
    I.Nitrogen
    II. carbon-di-oxide
    III. Noble gases
    IV. Oxygen

    (a)

    I and II

    (b)

    I and III

    (c)

    II and IV

    (d)

    I and IV

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