Skip to main content

Surface chemistry NCERT book Solutions


Q 5.1. Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.

Ans: This phenomenon of attracting and retaining the molecules of a substance by a solid or a liquid on its surface resulting into a higher concentration of the molecules on the surface is known as adsorption.

In absorption, the substance is uniformly distributed throughout the body of a solid or a liquid.

Water vapours are absorbed by anhydrous calcium chloride but adsorbed by silica gel.

For more questions Click on NCERT solutions

Labels:

Comments

Post a Comment

Popular posts from this blog

Colligative Properties Inforgraphics

Post a Comment
Read more

Solutions Chapter - Types of solutions

Introduction In normal life we rarely come across pure substances. Most of these are mixtures containing two or more pure substances. Their utility or importance in life depends on their composition. For example, the properties of Brass (mixture of Cu and Zn) are quite different from those of German silver (mixture of Cu, Zn and Ni) or Bronze (mixture of Cu and Sn); 1 ppm of Fluoride ions in water prevents tooth decay, while 1.5 ppm causes the tooth to become mottled and high concentrations of fluorides ions can be poisonous (for example, sodium fluoride is used in rat poison); intravenous injections are always dissolved in water containing salts at particular ionic concentrations that match with blood plasma concentrations and so on. Solution  - What does it mean? A true solution is defined as a perfectly homogeneous mixture of two or more substances   (called as components)  having uniform properties throughout and the composition of which may vary within limits. The su...
Post a Comment
Read more