Question

please clear my doubt.who clear my doubt with proof i gave 50 likes.....At what concentration of SO2 causes irritation of eyes.
options:-a) higher concentration
b) lowerconcentratio​n..... according to ncert 11th environment chemistry page no 407 oxides of sulphur topic they given a or b ​

Answer 1

Explanation:

higher concentration

higher concentrationplz give me heart

Answer 2

Answer:

0.35-1.05 ppm

Sulfur dioxide is a colorless gas at ambient temperature and pressure. It can be detected by taste at concentrations of 0.35-1.05 ppm and has a pungent, irritating odor with an odor threshold of 0.67-4.75 ppm. It is soluble in water and forms sulfurous acid which is slowly oxidized to sulfuric acid by dissolved oxygen.

Sulfur dioxide is a irritant that is highly soluble in the aqueous surfaces of the respiratory airways. Because of this high solubility, most of the sulfur dioxide is absorbed in the nose and upper airways and very little reaches the lungs directly. Inhalation of high ambient concentrations of sulfur dioxide can cause stimulation of the nerves in the air passages, resulting in a reflex cough, irritation, and chest tightness. Absorption of sulfur dioxide is concentration-dependent, with 85% absorption in the nose at 4–6 μg m−3. With the common ambient concentrations of sulfur dioxide, absorption in the upper airways may be inefficient. Increased flow rates reduce the percentage of inspired sulfur dioxide absorbed in the nose and upper airways, and thus exercise promotes delivery to the smaller airways.

rritant that is highly soluble in the aqueous surfaces of the respiratory airways. Because of this high solubility, most of the sulfur dioxide is absorbed in the nose and upper airways and very little reaches the lungs directly. Inhalation of high ambient concentrations of sulfur dioxide can cause stimulation of the nerves in the air passages, resulting in a reflex cough, irritation, and chest tightness. Absorption of sulfur dioxide is concentration-dependent, with 85% absorption in the nose at 4–6 μg m−3. With the common ambient concentrations of sulfur dioxide, absorption in the upper airways may be inefficient. Increased flow rates reduce the percentage of inspired sulfur dioxide absorbed in the nose and upper airways, and thus exercise promotes delivery to the smaller airways.At extremely high concentrations, the death or pathological changes including laryngotracheal and pulmonary edema can be induced in the respiratory tract of experimental animals. The gas is quite corrosive and can also cause damage to buildings and other materials.

It is Higher Concentration..

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