Micelle is formed when soaps and detergents are dissolved in water. Micelle consists of hydrophobic and hydrophilic parts. When present in water, they form spherical formations with their...
Give four uses of emulsions.
Emulsions are used for a variety of purposes. Four uses of emulsions have been listed below: (i) The cleansing action of soap is determined by the formation of emulsions. (ii) The emulsification...
Write the differences between multimolecular and macromolecular colloids. Give one example of each. How are associated colloids different from these colloids.
(I) The colloidal particles in multi-molecular colloids are an assemblage of atoms or tiny molecules having a diameter of less than 1 nm. The molecules in the aggregate are held together by Van der...
Discuss the trends in chemical reactivity of group 15 elements.
The general trends in chemical properties of the group – 15 are as follows:(i) Reactivity towards hydrogen:The elements present in group 15 undergo a reaction with hydrogen to form hydrides of type...
Why does the reactivity of nitrogen differ from phosphorus?
Nitrogen is a chemically less reactive element because of the high stability of its molecular form ${{N}_{2}}$. In nitrogen molecule, the two nitrogen atoms form a triple bond among themselves....
Discuss the general characteristics of Group 15 elements with reference to their electronic configuration, oxidation state, atomic size, ionisation enthalpy and electronegativity.
The general trend in group 15 elements is described as follows:(i) Oxidation states: The group 15 elements require 3 or more number of electrons to complete their octet and have 5 electrons in...