Upper atmospheric 03 layer is depleted by---

A Ammonia gas
B Carbon
C Freon gas
D Helium gas

Correct Answer: Freon gas

Ozone depletion, gradual thinning of Earth's ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. The thinning is most pronounced in the polar regions, especially over Antarctica.
Bissoy MCQ
#সাধারণ বিজ্ঞান #রোগ প্রতিরোধ (Immune System) #Standard Bank Ltd #Standard Bank Ltd - Asst. Officer (Cash) - 25.11.2011

Related Questions

Atmospheric ozone layer which protect us from UV-B and C is getting depleted most by addition of
A chlorofluorocarbon
B carbon monoxide
C carbon dioxide
D sulpur dioxide
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
A CO
B SO2
C NOx
D CFC (chloro fluoro carbons)
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
A 3, 3, 1, 7
B 3, 2, 1, none
C 3, 2, 1, 7
D 3, 3, 2, none
E All of the above
The earth's resources are being depleted too fast. To correct this , Alpha country must keep its resource consumption at present levels for many years to come. Which of the following , if true , would most strengthen the argument above ?
A New resource deposits are constantly being discovered
B Other countries need economic development more than Alpha country does.
C Alpha country consumes one-third of all resources used in the world
D Other countries have agreed to hold their resource consumption at present levels
Now the soils are depleted and the fields are 'barren' .
A plentiful
B productive
C dirty
D loose
The earth's resources are being depleted much too fast, To correct this, as a developing country, Bangladesh must keep its resource consumption at present levels for many years to come". The argument in this statement is based on which of the following assumptions?
A Per capital resource consumption in Bangladesh is at an all-tome high
B Curbing resource consumption of Bangladesh will significantly delay world resource delpetion
C Bangladesh uses more resources than any other country
D Bangladesh imports most of the resources it uses.
Unless the new reserves are found soon, the world's supply of coal is being depleted in such a way that with demand continuing to grow at present rates, reserves will be exhausted by the year 2050. Which of the following , if true , will weaken he above a
A There has been a slowdown in the rate of increase in world demand for coal over the last 5 years from 10% to 5%
B It has been known for many years that there are vast stocks of coal under Antarctica which have yet to be economically exploited
C Oil is being used increasingly in place of coal for many industrial and domestic uses
D As coal resources are depleted more and marginal supplies , which are more costly to produce and less efficient in use , are being mined
Unless new reserves are found , the world's supply of coal is being depleted in such a way that with demand continuing to grow at present rate, reserves will be exhausted by the year 2050. What is the best conclusion that can be drawn from the above paragraph ?
A It is the time to search for alternative
B New reserves of coal would be found before 2050
C Demand for coal is growing fast
D World's coal reserve is declining
Ozone level is generally found to be depleted in India in the month of
A February
B July
C April
D December
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
A Thermosphere
B Stratosphere
C Troposphere
D Mesosphere

Next steps