SAT - Science - Chemistry - Air

Question - 1

78% of air by volume is

  • A Nitrogen
  • B Carbon dioxide
  • C Oxygen
  • D Ozone

Question - 2

Due to direct exposure to sun's radiation the atoms convert into ions in:

  • A Troposphere
  • B Ionosphere
  • C Ozone layer
  • D Stratosphere

Question - 3

Dentrifying bacteria

  • A Converts atmospheric N2 into nitrates.
  • B Remove nitrogen from the soil
  • C Converts nitrate of soil back into atmospheric nitrogen
  • D Have nothing to do with N2 cycle.

Question - 4

The layer of atmosphere nearest to earth surface is

  • A Troposphere
  • B Stratosphere
  • C Ozone layer
  • D Ionosphere

Question - 5

The layer which reflects radio signals back to earth is

  • A Ozone layer
  • B Troposphere
  • C Ionosphere
  • D Stratosphere

Question - 6

Aneroid barometer means:

  • A Without liquid
  • B Without solid
  • C Without gas
  • D Without liquid and gas

Question - 7

0.03% of air consist of

  • A Ar
  • B N2
  • C O2
  • D CO2

Question - 8

At sea level, atmospheric pressure is equal to the weight of a mass acting on every square centimeter

  • A 1 gm
  • B 10 kg
  • C 1 kg
  • D 10 gm

Question - 9

Barometer is a thin glass tube containing:

  • A Mercury
  • B Lead
  • C Tin
  • D Tungsten

Question - 10

The layer of atmosphere which is cold, thin without cloud and dust is

  • A Troposphere
  • B Ozone layer
  • C Stratosphere
  • D Ionosphere
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