(D) The biosphere is the global ecological system integrating all living beings and their relationships,including their interaction with the elements

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Living organisms + lithosphere + atmosphere + hydrosphere

(D) The biosphere is the global ecological system integrating all living beings and their relationships,including their interaction with the elements of the lithosphere,hydrosphere,and atmosphere.

Class 11 Chemistry Environmental Chemistry Environmental Study

Medium

$A$ biosphere is composed of

A
Living organisms
B
Living organisms + lithosphere
C
Living organisms + lithosphere + atmosphere
D
Living organisms + lithosphere + atmosphere + hydrosphere

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Class 11

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Chapter

Environmental Chemistry

Subtopic

Environmental Study

Methemoglobinemia is caused by the presence of $X$ in drinking water. $X$ is

EasyAP EAMCET 2018

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Match the following:

List-$I$ (Pollutant concentration limit in water) List-$II$ (Effect)

$A. Pb > 50 \ ppb$ $I. \text{Liver damage}$

$B. SO_4^{2-} > 500 \ ppm$ $II. \text{Laxative effect}$

$C. NO_3^{-} > 50 \ ppm$ $III. \text{Blue baby syndrome}$

$D. F^{-} > 2 \ ppm$ $IV. \text{Brown mottling of teeth}$

The correct answer is

List-$I$ (Pollutant concentration limit in water)	List-$II$ (Effect)
$A. Pb > 50 \ ppb$	$I. \text{Liver damage}$
$B. SO_4^{2-} > 500 \ ppm$	$II. \text{Laxative effect}$
$C. NO_3^{-} > 50 \ ppm$	$III. \text{Blue baby syndrome}$
$D. F^{-} > 2 \ ppm$	$IV. \text{Brown mottling of teeth}$