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0.21 The correct set of species responsible for the photochemical smog is : Options 4. N2, O2, O3 and hydrocarbons 2. N2, NO, and hydrocarbons 3. CO2, NO2, SO, and hydrocarbons 4. NO, NO2, O3 and hydrocarbons

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Similar Questions
Q1
Nitric oxide $$(NO)$$ is the nucleus of photochemical smog.

$$2NO(g) +O_2(air) \to 2NO_2(g)$$

$$NO_2(g) \xrightarrow {Sunlight} NO(g)+[O]$$

$$[O]+O_2(g) \to O_3(g)$$

Both $$NO_2$$ and $$O_3$$ are strong oxidising agents and react with unburnt hydrocarbons on the polluted air to produce formaldehyde, acrolein and peroxyacetyl nitrate (PAN). These products are harmful to the plant and animal life.

Catalytic converters are now installed in the automobiles to reduce the photochemical smog. Photochemical smog can also be suppressed by certain compounds, which act as free radical trap.

Smog is common pollutant in places having:
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Q2
Nitric oxide $$(NO)$$ is the nucleus of photochemical smog.
$$2NO(g) +O_2(air) \to 2NO_2(g)$$
$$NO_2(g) \xrightarrow {Sunlight} NO(g)+[O]$$
$$[O]+O_2(g) \to O_3(g)$$
Both $$NO_2$$ and $$O_3$$ are strong oxidising agents and react with unburnt hydrocarbons on the polluted air to produce formaldehyde, acrolein and peroxyacetyl nitrate (PAN). These products are harmful to the plant and animal life.
Catalytic converters are now installed in the automobiles to reduce the photochemical smog. Photochemical smog can also be suppressed by certain compounds, which act as free radical trap.

Photochemical transformation of the automobile exhaust emission in UV wavelength of sunlight results into:
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Q3
The correct order of the oxidation states of nitrogen in $$NO,{N}_{2}O,{NO}_{2}$$ and $${N}_{2}{O}_{3}$$ is:
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Q4
Reason
The UV rays of sunlight catalyses the reaction of $$NO_2$$, hydrocarbons etc. contained polluted air.
Assertion
The smog is mainly formed during day time having clear sky and pollution free atmosphere.
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Q5
Reason
It is formed by an action of oxides of nitrogen and hydrocarbons in presence of sunlight.
Assertion
PAN is main constituent of photochemical smog.
PAN is main constituent of photochemical smog.
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