The Atmosphere

Options:

1. Kennelly
2. Napier Shaw
3. V.Berkneise
4. Teisserence de Bort

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1. collision of oxygen isotopes
2. absorption of solar radiation by water vapours
3. burning of meteors
4. absorption of ultraviolet solar radiation by ozone and lesser density of air

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1. lower stratosphere
2. upper stratosphere
3. upper troposphere
4. lower mesosphere

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1. 50 km and 90 km
2. 50 km and 70 km
3. 50 km and 80 km
4. 30 km and 50 km

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1. lower stratosphere
2. stratosphere
3. troposphere
4. mesosphere

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1. temperature increases rapidly with increasing height
2. low atmospheric density
3. temperature at its upper limit (height undecided) becomes 1700°C
4. temperature decreases rapidly with increasing height

Options:

1. 1 and 2 are correct.
2. 2, 3 and 4 are correct.
3. 1, 2 and 3 are correct.
4. all are correct.

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Options:

1. Heaviside layer
2. Kennelly layer
3. Kennelly-Heaviside layer
4. Appleton layer

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1. It reflects the signals of low frequency radio waves
2. It absorbs the signals of medium and high frequency waves
3. It disappears with the sunset because it is associated with solar radiation
4. It reflects the medium and high frequency radio waves back to the earth

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Options:

1. It is produced due to interaction of solar ultra-violet photons with nitrogen and nitrogen molecules
2. It also disappears with the sunset
3. It is also known as Appleton layer
4. It reflects the medium and high frequency radio waves back to the earth

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Options:

1. It is produced due to interaction of solar ultra-violet photons with nitrogen and nitrogen molecules
2. It also disappears with the sunset
3. It reflects medium and high frequency radio waves back to the earth
4. It reflects only medium radio waves back to the earth

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Options:

1. Troposphere, Mesosphere, Stratosphere and Thermosphere
2. Troposphere, Stratosphere, Thermosphere and Mesosphere
3. Troposphere, Stratosphere, Mesosphere and Thermosphere
4. Troposphere, Thermosphere, Mesosphere and Stratosphere

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Options:

1. Magnetosphere
2. Ionosphere
3. Thermosphere
4. Mesosphere

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1. Two Zones
2. Three Zones
3. Four Zones
4. Five Zones

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1. it represents the lower portion of the atmosphere
2. it extends up to the height of
3. km from sea level.
4. the main constituent gases are oxygen (20.946%) and nitrogen (78.084%).
5. the proportions of different gases are uniform at different levels in this zone

Options:

1. 1 and 2 are correct.
2. 2, 3 and 4 are correct.
3. 1, 2 and 3 are correct.
4. all are correct.

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Options:

1. Troposphere, Mesosphere, Stratosphere
2. Mesosphere, Stratosphere, Thermosphere
3. Troposphere, Thermosphere, Mesosphere
4. Thermosphere, Mesosphere, Exosphere

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Options:

1. 90 km to 1000 km
2. 90 km to 10000 km
3. 90 km to 600 km
4. 90 km to 6000 km

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1. The concentration of atmospheric carbon dioxide at the beginning of the industrial revolution (1860 A.D.) was fixed at 280 to 290 ppm (part per million) by volume
2. The level of carbon dioxide has been increased by 25 percent from the preindustrial level

Options:

1. Only 1
2. Only 2
3. Both 1 and 2
4. None of the above

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Options:

1. Exosphere and magnetosphere
2. Exosphere and ionosphere
3. Ionosphere and magnetosphere
4. Mesosphere and exosphere

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Options:

1. F1 and F2 layers
2. F and E layers
3. E and G layers
4. E and E2 layers

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(i) Gases
(ii)  Vapor
(iii)  Particulates
Select the correct code:

Options:

1. (i) and (ii)
2. (ii) and (iii)
3. (i) and (iii)
4. (i), (ii) and (iii)

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