Vitamins-Sources and Deficiency Diseases

Vitamins-Sources and Deficiency Diseases: Vitamins- Vitamins as the name suggest are vital minerals for life. These are organic compounds which are essential for normal metabolism of body cell though they neither supply energy nor serve as a building material. Vitamin free diet causes certain diseases and may even cause death. These are not synthesised by the …

Soil Erosion & Soil Conservation Measures

Soil Erosion & Soil Conservation Measures: What is Soil? The surface material covering much of the earth, composed of the minerals, particles, humus, water, air, in which plants can grow is called soil. It is the loose material forming the upper layer of the earth’s crust. It is formed slowly over a longer period by chemical …

Essay on The Importance of Trifles

The Importance of Trifles: Trifles, light as air, sometimes produce results as big as Colossus. Daily we waste minutes and hours as things of no importance, yet these trifles make up the whole life. If we waste a few minutes a day, they total up to years after many years. A person who spends a few …

Coupled Reactions and its Significance

What are Coupled Reactions? For the spontaneity of a reaction, ΔG must be negative. There are some reactions, for which the value of ΔG is positive and therefore, these reactions are non-spontaneous. These reactions can be made spontaneous if these reactions are carried by coupling with some other reactions having very large negative Gibbs energy value …

Significance of Gibbs Free Energy Change

Significance of Gibbs Free Energy Change: ΔG is a measure of the spontaneity of a chemical reaction. Gibbs energy change is also related to useful work other than pressure-volume work that can be obtained from the system. It can be shown that Gibbs energy of a process is equal to maximum possible useful work that can …

Mohammad Iqbal Philosophy

Mohammad Iqbal Philosophy: (1) Universe- The Universe is designed to serve as the theatre of man’s growing and manifold activity. It is not a finished product that has left the hands of God. It is not predetermined. It is growing, advancing and has the capacity for infinite growth and development. It is not a complete truth. …

Brief Life Sketch of Mohammad Iqbal

Mohammad Iqbal: Iqbal was born on 22nd February 1873 in a Muslim family of Sialkot, now in Pakistan. It had migrated from Kashmir. His father Sheikh Nur Mohammad was a trader. He did his M.A. in Philosophy from Govt. College Lahore in 1899, took his Honours Degree in Philosophy from Cambridge, his doctorate from the University …

Verb Tenses

Verb Tenses: 1:- The Tense of a Verb shows the time, state and degree of the completion of the action. There are three main Tenses- (I) The Present Tense, which shows that the action is done at the present time; as, I go to school. (II) The Past Tense, which shows that the action was done …

Crystal Field Theory or Ligand Field Theory

Crystal Field Theory: This theory was developed by Hans Bethe (1929) and John Van Vleck (1932). The main postulates of this theory are- (1) According to this theory there exist an electrostatic force of attraction between the metal ion and ligand i.e. this theory consider the ionic bond between metal ion and ligand. (2) The interactions …

Organometallic Compounds

Organometallic Compounds: Organometallic chemistry constitutes one of the most important areas of chemistry that unites the field of inorganic and organic chemistry together. As the name implies, organometallic compounds contain both a metal component as well as an organic component. Organometallic chemistry is that branch of chemistry that deals with compounds containing at least one direct …