nitrogen dioxide concentrations

Nitric acid can be concentrated up to 68%. It cannot be concentrated beyond this percentage by simply boiling because the aqueous solution of this concentration of nitric acid forms a constant boiling mixture at 121 o C. However, the acid can be further concentra..

In the atmosphere, the concentration of carbon dioxide ranges from .03 to .04 %. However, it is found that 0.1% of carbon dioxide in the atmosphere increases the rate of photosynthesis significantly. This is achieved in the greenhouses which are enclosed chambers wher..

>The nitric oxide so formed then reacts with more oxygen to form nitrogen dioxide. Nitrogen dioxide so formed, gets washed down by rain and forms nitrates and nitrites in the soil. Plants absorb these of nitrates and nitrites from the soil and convert them in..

It is also a pollutant, when generated in large quantity - because it can reduce the oxygen concentration in the air. It is a gas produced when fuel is burnt in adequate oxygen...

The apparatus is set up as shown in figure 14.3. ..

By treating sodium sulphite or bisulphite with dilute sulphuric acid or hydrochloric acid - The apparatus is set up as shown in figure 7.1. Sodium sulphite or bisulphite is taken in a round bottom flask. Dilute sulphuric or hydrochloric acid is added through the dropping funnel and heated gently. S..

In C 3 plants, the rate of photosynthesis increases with an increase. In CO 2 concentration upto 500 m l.l - 1 . In C 4 plants, photosynthetic rate increases with an increase in CO 2 concentration. However these plants attain saturation at around 360 ..

1. By direct burning of sulphur in air or oxygen Sulphur + Oxygen Sulphur dioxide 2. By heating certain metallic sulphides in air or oxygen 3. By the action of heat on sulphite..

is prepared by heating dried lead nitrate in a steel reaction vessel. Above 415 K it contains mainly NO 2 and at 250 K it contains mainly N 2 O 4 . By heating copper turnings with concentrated HNO 3..

The concentration of chlorophyll affects the rate of reaction as they absorb the light energy without which the reactions cannot proceed. Lack of chlorophyll or deficiency of chlorophyll results in chlorosis or yellowing of leaves. It can occur due to disease, mineral deficiency or the n..