Which of the following statements is not correct?
- ACatalytic converters present in automobiles prevent the release of nitrogen oxide to the atmosphere.
- BPhotochemical smog is a mixture of smoke,fog and $SO_2$.
- CChlorofluorocarbons damage ozone layer.
- DAcid rain corrodes water pipes resulting in the leaching of heavy metals into the drinking water.
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$CF_2Cl_2 \stackrel{UV}{\longrightarrow} X + Y$
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What is the correct sequence of atmospheric layers starting from the Earth's surface?
London smog is composed of which of the following?
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View SolutionGiven below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R:$
Assertion $A:$ Polluted water may have a value of $BOD$ of the order of $17 \, ppm$.
Reason $R:$ $BOD$ is a measure of oxygen required to oxidise both the biodegradable and non-biodegradable organic material in water.
In the light of the above statements,choose the most appropriate answer from the options given below.
Assertion $A:$ Polluted water may have a value of $BOD$ of the order of $17 \, ppm$.
Reason $R:$ $BOD$ is a measure of oxygen required to oxidise both the biodegradable and non-biodegradable organic material in water.
In the light of the above statements,choose the most appropriate answer from the options given below.
Classical smog is a mixture of .....
Medium
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