Important MCQ-Based Questions for class 11 Geography chapter-Composition and structure of the atmosphere
This page consists of Important MCQ questions from chapter-Composition and structure of atmosphere uploaded as per the CBSE syllabus and consists of a detailed explanation. Questions are prepared from the entire chapter-Composition and structure of atmosphere to give you effective revision.
Find below MCQ-Based Questions for class 11 Geography chapter-Composition and structure of the atmosphere
Important MCQ-based questions Geography class 11 chapter-Composition and structure of atmosphere Set-A
Geography - MCQ on Composition and Structure of Atmosphere
Class XI
Q.1. 99% of the total mass of the atmosphere is confined to the height of:
a) 42 Km
b) 32 Km
c) 35 Km
d) 52 Km
Answer:
(b) 32 Km
Q.2.Carbon dioxide and water found only up to the height of:
a) 80 Km
b) 90 Km
c) 60 Km
d) 40 Km
Answer:
(b) 90 Km
Q.3.Which of the following gasses absorbs ultra violet rays.
a) Carbon
b) Neon
c) Ozone
d) Nitrogen
Answer:
(c) Ozone
Exp. It is found between 10 and 50 Km above the surface of the earth and act as a filter.
Q.4.Which one of the following is not a layer of the atmosphere?/
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Asthenosphere
Answer:
(d) Asthenosphere
Exp. Asthenosphere is the upper layer of mantle in the interior of the earth.
Q.5.The first layer of the atmosphere is:
a) Stratosphere
b) Troposphere
c) Mesosphere
d) Thermosphere
Answer:
(b) Troposphere
Exp. Troposphere is the first layer of the atmosphere it is nearest to the surface of the earth.
Q.6. Troposphere is very important for us because:
a) It has ozone layer.
b) All the weather phenomena take place here.
c) It has gasses and water vapor.
d) None
Answer:
(b) All the weather phenomena take place in the troposphere.
Q.7. Which is not the Elements of atmosphere:
a) Temperature
b) Pressure
c) Winds
d) Waves
Answer:
(d) Waves
Q.8.Which one of the following gases constitutes the major portion of the atmosphere?
a) Oxygen
b) Nitrogen
c) Argon
d) Carbon dioxide
Answer:
(b) Nitrogen
Q.9.Sea salt, pollen, ash, smoke, soot, fine soil, these are associated with:
a) Gases
b) Dust particles
c) Water vapor
d) Meteors
Answer:
(b) Dust Particles
Q.10.Which one of the following gases is transparent to incoming solar radiation and opaque to out going terrestrial radiation.
a) Oxygen
b) Nitrogen
c) Hepum
d) Carbon dioxide
Answer:
(d) Carbon dioxide
Exp. Due to this property earth does not become excessively cold pke the moon during the night after radiating back the radiation absorbed in the day, and this gives green house effect to the earth.
Q.11.Why does temperature increase with increase in height in Stratosphere?
a) Closeness of the sun
b) Decrease in atmospheric pressure
c) Concentration of Ozone
d) None of these
Answer:
(c) Concentration of Ozone
Exp. Because Ozone absorbs ultra –violet radiation from the sun rays.
Q.12.Which one of the following absorbs the insolation from the sun and preserves the earths radiated heat thus acting pke a blanket.
a) Dust
b) Water vapor
c) Ozone
d) Nitrogen
Answer:
(b) Water vapor
Q.13.Exess carbon dioxide in the atmosphere due to pollution will cause.
a) Earths temperature to rise
b) Earths temperature to fall
c) No change in earth’s temperature
d) Increase in ultra-violet radiation reaching the earth
Answer:
(a) Earths temperature to rise
Exp. Earth temperature will rise with the increase in carbon because it absorbs the out going terrestrial radiation.
Q.14.The radiation that heats earth’s atmosphere comes from the:
a) Sun
b) Earth
c) Ionosphere
d) Sun and Earth
Answer:
(b) Earth
Q.15.The average height of the troposphere is:
a) 8 Km
b) 10 Km
c) 13 Km
d) 18 Km
Answer:
(c) 13 Km
Exp. Its height is 8 Km near the poles and about 18 Km at the Equator
Q.16.In Troposphere temperature:
a) Decreases with height
b) Increases with height
c) No change in temperature
d) None
Answer:
(a) Decreases with height
Q.17. The zone separating the Troposphere from Stratosphere is known as the:
a) Stratopause
b) Tropopause
c) Topaz
d) None
Answer:
(b) Tropopause
Q.18. Atmosphere was formed:
a) 4.6 billion years ago
b) 3 billion years ago
c) 6 billion years ago
d) 7 billion years ago
Answer:
(a) 4.6 billion years ago
Q.19. Only of sun’s energy reachesthe surface of Earth.
a) 34%
b) 19%
c) 47%
d) 52%
Answer:
(c) 47%
Q.20. Earth absorbs more than it loses.
a) Humidity
b) Heat
c) Gases
d) Water vapour
Answer:
(b) Heat
Q.21. is essential for respiration.
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer:
(a) Oxygen
Q.22. Heat island effect creates a dome of around a city.
a) Carbon dioxide
b) Ozone layer
c) Warm air
d) Cold air
Answer:
(c) Warm air
Q.23.A lies drawn on a weather map connecting points that receive equal amount of sunshine are:
a) Isohel
b) Isobar
c) Isothere
d) Isotherm
Answer:
(a) Isohel
Q.24.Exosphere pes:
a) in the thermosphere
b) above the thermosphere
c) in the stratosphere
d) No where.
Answer:
(b) Above the thermosphere.
Q.25. The weather phenimena takes place in which layer of atmosphere:
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Ionosphere
Answer:
(a) Troposphere
Q.1 Mesosphere extends to a height of:
a. 70 kms
b. 80 kms
c. 75 kms
d. 78 kms
Answer:
(b)
Explanation. It pes above stratosphere.
Q.2 At what height oxygen becomes negpgible in quantity?
a. 170 kms
b. 140 kms
c. 120 kms
d. 130 kms
Answer:
(c)
Explanation. The proportion of gases change in higher levels of atmosphere.
Q.3 Radio waves transmitted from the earth are reflected back to the earth by:
a. stratosphere
b. ionosphere
c. mesosphere
d. troposphere
Answer:
(b)
Explanation. Ionosphere is located between 80-400 kms above mesopause.
Q.4 Which gas is opaque to the outgoing terrestrial radiation?
a. carbon dioxide
b. nitrogen
c. oxygen
d. Hydrogen
Answer:
(a)
Explanation. It is responsible for green house effect.