CBSE Class 11 Geomorphic Composition and Structure of Atmosphere MCQs

Question :  What is the percentage of air in the atmosphere?
A. 32
B. 99
C. 0.1
D. 21

Answer :  B

Question : Which of the following is especially true of anticyclones in the southern hemisphere?
A. The air moves in a circular manner
B. Pressure increases from the outside to the centre
C. They often form over continents
D. The air moves in an anti-clockwise direction

Answer :   D

Question : Which of the following characterises the Foehn?
I. It is warm
II. It is humid
III. It is common in the valleys of the northern Alps
IV. It blows in winter
A. I, II and IV
B. I, II and III
C. I, III and IV
D. I, II, III and IV

Answer :   C

Question :  Agents of fog formation do not include ________
A. High relative humidity
B. Diurnal temperatures of short ranges
C. Winter season
D. Rapid radiation

Answer :  C

Question :  The boundary between troposphere and stratosphere is known as
A. tropopause
B. ionopause
C. stratopause
D. mesopause

Answer :  A

Question :  Atmospheric layer important for human beings is:
A. Stratosphere
B. Mesosphere
C. Troposphere
D. Ionosphere

Answer :  C

Question :  Which gas is found as a trace in the atmosphere?
A. oxygen
B. nitrogen
C. carbon dioxide
D. xenon

Answer :  D

Question :  Why the Earth is having its own atmosphere?
A. Winds
B. Clouds
C. Gravity
D. Rotation of the Earth

Answer :  C

Question :  Which layer of the atmosphere is useful for various biological activities?
A. stratosphere
B. troposphere
C. ionosphere
D. none of these

Answer :  B

Question :  The most important factor in thunderstorms development is ________
A. Atmospheric stability
B. Atmospheric instability
C. Abundance of moisture
D. Temperature inversion

Answer :  B

Question :  The mesosphere lies above the
A. troposphere
B. stratosphere
C. ionosphere
D. exosphere

Answer :  B

Question :  The continuous circulation of water among the hydrosphere, atmosphere and lithosphere is known as
A. Water circulation
B. Hydrologic cycle
C. Hydro-equilibrium
D. Precipitation

Answer :  B

Question :  Why does the atmosphere help sustain and protect life on the earth's surface?
A. The ozone layer shields us from harmful UV radiation.
B.Greenhouse gases warm the air near the surface by 30o C.
C. Oxygen is a major component of the atmosphere.
D. all of the choices

Answer :  D

Question :  The equipment to measure atmospheric humidity is
A. Anemometer
B. Psychrometer
C. Hydrometer
D. Lysimeter

Answer :  B

Question : Which one of the following gases constitutes the major portion of the atmosphere?
A. Oxygen
B. Nitrogen
C. Argon
D. Carbon dioxide

Answer :  B

Question :  Which of the following layers of the Earth's atmosphere provide ideal flying conditions for Jet aircraft?
A. Mesosphere
B. Thermosphere
C. Stratosphere
D. Troposphere

Answer :  C

Question : Which one of the following gases is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation?
A. Oxygen
B. Nitrogen
C. Helium
D. Carbon dioxide

Answer :  D

Question : The water content in the atmosphere ________
A. Is independent of temperature
B. Increases as temperature increases
C. Decreases as temperature increases
D. Either increases or decreases with temperature increase

Answer :   C

Question : Which of the following is produced by the rapid ascent of moist air?
A. Frost 
B. Fog
C. Hail
D. Snow

Answer :   C

Question : Which is the warmest layer of the atmosphere?
A. Thermosphere
B. Troposphere
C. Stratosphere
D. Mesosphere

Answer :  A

Question :  Chief elements of the atmosphere are
A. wind
B. temperature
C. pressure
D. all of them

Answer :  D

Question : The dense mass of small water drops on smoke particles in the lower layers of the atmosphere is ________
A. Smog
B. Frost
C. Fog
D. Dew

Answer :  A

Question : By volume, dry air contains
A. 0.63% of argon
B. 0.73% of argon
C. 0.93% of argon
D. 1.53% of argon

Answer :  C

Question : Temperate cyclones bring along with them ________
A. Pleasant weather
B. Snowfall and hail
C. Thunderstorms and torrential rainfall
D. Mild rainfall

Answer :  D

Question : The ozone layer is present in
A. Thermosphere
B. Stratosphere
C. Troposphere
D. Mesosphere

Answer :  B

Question : What is the major role of a greenhouse gas that contributes to temperature rise of the Earth's surface?
A. Transparent to both incoming sunlight and outgoing infrared radiation
B. Stops both incoming sunlight and outgoing infrared radiation
C. Lets outgoing infrared radiation pass through but stops incoming sunlight
D. Lets incoming sunlight pass through but stops outgoing infrared radiation

Answer :  D

Question : Compared to other slopes in the northern hemisphere which is the warmest?
A. East facing
B. South facing
C. North facing
D. West facing

Answer :  B

Question : Which of the following is NOT a major component of the atmosphere?
A.nitrogen
B. oxygen
C. ozone
D. argon

Answer :  C

Question :  Which of the following statements is incorrect?
A. Roaring forties are the southern latitudes where Westerlies are prevalent
B. Monsoons are local seasonal winds
C. Doldrum belt lies between 10°N and 10°S latitudes
D. Horse latitudes are found between Trade winds and Westerlies

Answer :  B

Question :  The highest layer that can be accessed by jet powered aircraft.
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere

Answer :  B

Question :  The average atmospheric pressure at sea level is
A. 660 mmHg
B. 700 mmHg
C. 760 mmHg
D. 800 mm Hg

Answer :  C

Question :   Excess carbon dioxide in the atmosphere due to pollution will cause
A. Earth's temperature to rise
B. Earth's temperature to fall
C. No change in earth's temperature
D. Increase in ultra-violet radiation reaching the earth

Answer :  A

Question :  The refractive index of air is
A. 0
B. slightly less than 1
C. 1
D. just greater than one

Answer :  D

Question : The dry wind 'Santa Ana' blows in ________
A. Siberia
B. Argentina
C. Switzerland
D. California

Answer :  D

Question :  Which of the following sequences of clouds in ascending order would one meet 500 metres and above the mean sea level?
A. Stratus, Nimbus, Cirrostratus, Cirrus
B. Nimbus, Cirrostratus, Cirrocumulus, Stratus
C. Cirrostratus, Stratus, Cumulo-nimbus
D. Stratus, Cirrostratus, Cumulo-numbus, Cirrocumulus

Answer :  A

Question : The monsoon has well-developed cycle in ________
A. South and South East Asia
B. North Australia
C. East United States
D. Africa

Answer :  A