Photochemical smog is a type of air pollution that occurs in urban areas and is formed through a series of complex chemical reactions involving sunlight, nitrogen oxides, and volatile organic compounds (VOCs).
Key components of photochemical smog include:
Ozone (O3)
Nitrogen oxides (NOx)
Volatile organic compounds (VOCs)
Peroxyacetyl nitrate (PAN)
Aldehydes
Among the given options, Peroxyacetyl nitrate (PAN) is a well-known component of photochemical smog.
Peroxyacetyl nitrate (PAN) is a secondary pollutant formed from the reaction of hydrocarbons, nitrogen oxides, and sunlight. It is a potent eye irritant and respiratory toxin.
Therefore, the correct answer is Peroxyacetyl nitrate.
Final Answer:
Peroxyacetyl nitrate.
Identify the correct statement from the following:
UK 'copper' coins are Cu/Ni alloy. AgBr has special light-sensitive properties. Ti\(^{2+}\), V\(^{2+}\), Cr\(^{2+}\) are strong oxidising agents. The magnetic moment of V\(^{2+}\) is 2.84 BM.
Match List I with List II
List I | List II | ||
A | Physisorption | i | Single Layer Adsorption |
B | Chemisorption | ii | 20−40kJmol−1 |
C | N2(g)+3H2(g)—⇢Fe(s)—⇢2NH3(g) | iii | Chromatography |
D | Analytical Application or Adsorption | iv | Heterogeneous catalysis |
Choose the correct answer from the options given below:
Process | ΔH/kJmol−1 | ΔS/JK−1 |
A | -25 | -80 |
B | -22 | 40 |
C | 25 | -50 |
D | 22 | 20 |
Given are two statements one is labelled as Assertion A and other is labelled as Reason R.
Assertion A : Magnesium can reduce Al2O3 at a temperature below 1350°C, while above 1350°C aluminium can reduce MgO.
Reason R : The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements, choose the most appropriate answer from the options given below :