Last seen: Mar 10, 2022
(i) Suspended solids, e.g., Sand, silt and clay. (ii) Colloidal materials, e.g., Fecal matter, bacteria, cloth and paper fibres. (iii) Dissolved...
Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
Presence of large amounts of nutrients in waters causes excessive growth of planktonic (free-floating) algae, called an algal bloom.
Fertiliser factory.
Acacia and Neem.
Blends of polyblend and bitumen, when used to lay roads, enhanced the bitumen’s water repellant properties, hence helped to increase road life by a fa...
Plastic waste.
When particulate matter inhaled deep into the lungs they cause: (i) Breathing and respiratory symptoms (ii) Irritation (iii) Inflammations ...
Pollutants from man’s activities like effluents from the industries and homes can radically accelerate the aging process. This phenomenon has been cal...
The soil particles carried by water from the source of supply.
(i) In multi-molecular colloids, the colloidal particles are an aggregate of atoms or small molecules with a diameter of less than 1 nm. The molecules...
(i) Lyophilic sols: Colloidal sols that are formed by mixing substances such as gum, gelatin, starch, etc. with a suitable liquid (dispersion medium) ...
Effect of pressure Adsorption is a reversible process and is accompanied by a decrease in pressure. Therefore, adsorption increases with an increas...
One criterion for classifying colloids is the physical state of the dispersed phase and dispersion medium. Depending upon the type of the dispersed ph...
Adsorption is always exothermic. This statement can be explained in two ways. (i) Adsorption leads to a decrease in the residual forces on the surf...
Heterogeneous catalysis: A catalytic process in which the catalyst and the reactants are present in different phases is known as a heterogeneous catal...
By activating an adsorbent, we tend to increase the adsorbing power of the adsorbent. Some ways to activate an adsorbent are: (i) By increasing ...
figure.png The plot between the extent of adsorption x/m against the pressure of gas (P) at constant temperature (T) is called the adsorption isothe...
There are various factors that affect the rate of adsorption of a gas on a solid surface. (1) Nature of the gas: Easily liquefiable gases such as N...