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Nitric oxide (NO) is the nucleus of phot...

Nitric oxide (NO) is the nucleus of photochemical smog.
2NO(g) + `O_(2) ("air") rarr 2NO_(2)` (g)
`NO_(2)(g) overset("Sunlight")(rarr) `NO(g) + [O]
[O]`+ O_(2) (g) rarr O_(3)(g)`
Both `NO_(2) and O_(3)` are strong oxidising agents and react with unburnt hydrocarbons in 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 supressed by certain compounds, which act as free radical trap.
Which are the primary constituents of photochemical smog ?

A

`SO_2 and CO`

B

`NO_2` and hydrocarbons

C

`CO_2 and NO_2`

D

`CO and CO_2`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Nitric oxide (NO) is the nucleus of photochemical smog. 2NO(g) + O_(2) ("air") rarr 2NO_(2) (g) NO_(2)(g) overset("Sunlight")(rarr) NO(g) + [O] [O] + O_(2) (g) rarr O_(3)(g) Both NO_(2) and O_(3) are strong oxidising agents and react with unburnt hydrocarbons in 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 supressed by certain compounds, which act as free radical trap. Smog is common pollutant in places having :

    A
    high temperature
    B
    low temperature
    C
    excessive ammonia in the air
    D
    excessive sulphur dioxide in the air

  • Nitric oxide (NO) is the nucleus of photochemical smog. 2NO(g) + O_(2) ("air") rarr 2NO_(2) (g) NO_(2)(g) overset("Sunlight")(rarr) NO(g) + [O] [O] + O_(2) (g) rarr O_(3)(g) Both NO_(2) and O_(3) are strong oxidising agents and react with unburnt hydrocarbons in 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 supressed by certain compounds, which act as free radical trap. Photochemical transformation of the automobile exhaust emission in UV wavelength of sunlight results into

    A
    `CH_(4) and C_(6) H_(6)`
    B
    `O_(3) and `PAN
    C
    `CO_(2) and NO_(2)`
    D
    `CO and CO_(2)`

  • Nitric oxide (NO) is the nucleus of photochemical smog. 2NO_((g)) + O_(2("air")) to 2NO_(2(g)) NO_(2(g)) overset("sunlight")to 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 hydrocorbons in the polluted air to produce formaldehyde, acrolein and peroxyyacetyl 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 smog formed in congested metropolitan cities mainly consists of:

    A
    hydrocarbons, `SO_2 and CO_2`
    B
    hydrocarbons, ozone and `SO_2`
    C
    ozone, peroxyacetyl nitrate and `NO_2`
    D
    smoke, peroxyacetyl nitrate and `SO_2`

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