Solution:
A gel is a solid, jelly-like material that can have properties ranging from soft and weak to hard and tough. Gels consist of a solid three-dimensional network that spans the volume of a liquid medium and ensnares it through surface tension effects. Shaving creams in a can are commonly dispensed as a foam or a gel.

Solution:
Ammonium chloride (NH4) is generally considered as an ionic compound but this compound has three different types of bond. There is ionic bond between NH4+ ion and Cl- ion. There are N-H covalent bonds. The formation of NH4+ from NH3 is sometimes described as the formation of a coordinate bond between NH3 and H+ , however once the bond is formed there is no difference between the four N-H bonds, NH4+ has a tetrahedral structure.

Solution:
In the periodic table of elements, on moving from left to right across a period, the atomic radius decreases.

Solution:
If water smells bad, then that odour can be removed by adding activated carbon.

Solution:
The extent to which an electrolyte dissociates into ions is known as degree of dissociation or ionization and depends upon the following factors: (1) Nature of the electrolyte, (2) Temperature, (3) Dilution, (4) nature of the solvent, and (5) presence of other ions.

Solution:
Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities.

Solution:
3 leak of toxic methyl isocyanate gas at a Union Carbide plant in the central Indian city of Bhopal produced history's worst industrial disaster, stunning India and the world.