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Greenhouse Effect...

Greenhouse Effect

A

Infra-red rays

B

Ultraviolet rays

C

X-rays

D

Radiowaves

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The correct Answer is:
A
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Assertion:- If earth did not have atomosphere, its average surface temperature would be lower than what it is now. Reason:- Greenhouse effect of the atmosphre would be absent, if earth did not have atmosphere.

Four gases which cause greenhouse effect are shown with their percentage of effect. Which one of these gases produces favourable effect on plants up to a limit but in conditions of global warming why is its beneficial effect not observed ?

Assertion : Contribuition of CO_(2), CH_(4), CFCs " and " N_(2)O towards greenhouse effect is respectively 60%, 6 %, 14 % and 20 %. Reason : Greenhouse gases are radioactively active gases which prevent the short wavelength radiations emitted by earth to escape into space.

'Indiscriminate human activities have strengthened the greenhouse effect resulting in Global Warming''. Give the relative contribution of various Green House Gases in the form of a pie chart and explain the fate of the energy of sunlight reaching the earth’s surface contributing towards Global Warming.

How many statements are correct ? a. Biomagnification is the natural ageing of a lake by nutrient enrichment of its water b. After CFC, methane is a major cause of greenhouse effect c. Ozone is a secondary pollutant in troposphere d. The thickness of the ozone is measured in Dobson unit

Name the following: i] The process by which ethane is obtained from ethene. ii] A hydrocarbon which contributes towards the greenhouse effect iii] The distinctive reaction that takes place when ethanol is treated with acetic acid. iv] The property of elements by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure. v] The reaction when an alkyl halide is treated with alcoholic potassium hydroxide.

CO_2 and H_2 O absorbs strongly in the infrared rrgion and its presence in the atmospheere dectrases the loss fo heat form the enrth by radistiion . This global warming is called the greenhouse effect (other gases , including the oxides of nitraongen form car exhauset freons from aerosols and refrigeratirs and methane from bacteria in the soil and in the rument cows , also add to the reeenhouse effect ). The concentration fo atmospheric CO_2 has increased by 10% . The is rsulting in the increase in the mean temperature fo the earth by 2. 5^@ C , varying form 2^@ C t the equlator to 4^@ C at the poles . This could have dramatic effects on the climate. Instead of monitoring carbon dioxide suggest another gas that scientists could studey to substantiate the fact that CO_2 conentration is steadily increasing in the atmosphere ?

CO_2 and H_2 O absorbs strongly in the infrared rrgion and its presence in the atmospheere dectrases the loss fo heat form the enrth by radistiion . This global warming is called the greenhouse effect (other gases , including the oxides of nitraongen form car exhauset freons from aerosols and refrigeratirs and methane from bacteria in the soil and in the rument cows , also add to the reeenhouse effect ). The concentration fo atmospheric CO_2 has increased by 10% . The is rsulting in the increase in the mean temperature fo the earth by 2. 5^@ C , varying form 2^@ C t the equlator to 4^@ C at the poles . This could have dramatic effects on the climate. The equilibrium constant (K_(p)) for the reaction 2CO_((g))underset(larr)(rarr)2CO_(2(g)) is 1.4xx10^(90) at 25^(@)C . Given this enormous value, why does not CO convert totally into CO_(2) in the troposphere?.

Greenhouse gases are

Greenhouse gases cause

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