Acid present in the acid rain may be?

Explanation

(a) H₂SO₄ (sulfuric acid): This is the primary acid found in acid rain, accounting for roughly 60% of the acidity. It forms when sulfur dioxide (SO₂) emitted from fossil fuel combustion and volcanic eruptions reacts with water vapor and oxygen in the atmosphere.(b) HNO₃ (nitric acid): This contributes about 20% of the acidity in acid rain. It forms when nitrogen oxides (NOx) released from vehicle emissions and industrial processes react with water vapor and oxygen in the air.Now we'll look at why other options are incorrect.(d) none: As explained above, both H₂SO₄ and HNO₃ are present in acid rain.(b) HNO₃ only: While nitric acid is significant, sulfuric acid makes up the majority of acidity.(Environmental chemistry,Introduction and Types of Pollution Factors affecting Water Quality ) Q10: The yellow color in photochemical smog is due to the presence of? (a) dinitrogen oxide (b) nitrogen dioxide (c) chlorine gas (d) chlorine dioxideAnswer:(b) Nitrogen dioxide (NO₂): This gas absorbs blue light wavelengths, giving the remaining scattered light a yellowish or brownish hue. This is the main contributor to the characteristic color of photochemical smog.Now we'll look at why other options are incorrect.(a) Dinitrogen oxide (N₂O): While N₂O does contribute to greenhouse gas effects, it doesn't have a significant impact on the color of smog.(c) Chlorine gas (Cl₂): This gas is typically greenish-yellow, but its concentrations in smog are usually too low to have a noticeable impact on color.(d) Chlorine dioxide (ClO₂): Similar to chlorine gas, its concentrations are generally too low to affect the overall color of smog.(Environmental chemistry,Introduction and Types of Pollution Factors affecting Water Quality )