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Greenhouse Effect

Which of the ...

Question

Which of the following cause green house effect?
(i) Deforestation
(ii) Emission of gases from factories
(iii) Melting of polar ice

A

Only (i) and (ii)

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B

Only (i) and (iii)

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C

Only (ii) and (ii)

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D

(i), (ii) and (iii)

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Solution

The correct option is D Only (i) and (ii)
Deforestation is removal, decrease or deterioration of forest cover of an area. It causes the change in climate, floods, soil erosion, siltation, cyclones, drought, desertification and increased level of carbon dioxide (greenhouse gas) in the atmosphere. Greenhouse gases like carbon dioxide and CH $_{4}$ that are also released from factories cause green house effect.

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Match the greenhouse gases listed in column - II with their respective sources (activities from which they get released) in column - I.
$\begin{matrix} C o l u m n - I A c t i v i t i e s & C o l u m n - I I G r e e n h o u s e g a s e s A & C o m b u s t i o n o f f o s s i l f u e l & p & C a r b o n d i o x i d e B & S w a m p a n d r i c e f i e l d s & q & O z o n e C & R e f r i g e r a t i o n & r & N i t r o u s o x i d e D & B u r n i n g o f b i o m a s s & s & M e t h a n e t & C F C_{s} \end{matrix}$

Q. 46. With reference to Green House Gases (GHGs)., which of the following statements are incorrect?
i) Green House gases are also called radioactively active gases.
ii) India has opposed the second commitment period of Kyoto protocol owing to developmental obligations.
iii Atmospheric lifetime of Methane is much more than Chlorofluorocarbons.
Options;
a) i only
b) ii and iii only
c) iii only
d) i, ii and iii only46. With reference to Green House Gases (GHGs)., which of the following statements are incorrect?
i) Green House gases are also called radioactively active gases.
ii) India has opposed the second commitment period of Kyoto protocol owing to developmental obligations.
iii Atmospheric lifetime of Methane is much more than Chlorofluorocarbons.
Options;

Q. Among the gases (i) – (v), the gases that cause greenhouse effect are:
i.

C O_{2}

H_{2} O

C F C

O_{2}

O_{3}

Match the global warming activities given under column I with respective green house gases produced under column II and select the right answer.

\begin{tabular}{|l|l|l|l|} \hline & \multicolumn{1}{|c|}{ Column - I Activities } & & Column - II Green house gases \\ \hline A & Combustion of fossil fuel & \( p \) & Carbon dioxide \\ \hline B & Swamp and rice fields & \( q \) & Ozone \\ \hline C & Refrigeration & \( r \) & Nitrous oxide \\ \hline D & Burning of biomass & \( s \) & Methane \\ \hline & & \( t \) & \( CFC _{s} \) \\ \hline \end{tabular}

Q. Question 6
Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal

(a) (i), (ii) and (iii)
(b) (i), (ii) and (iv)
(c) (i), (iii) and (iv)
(d) (ii), (iii) and (iv)

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