Discover Chemistry

Oxygen is one of Earth's most abundant and crucial elements, with profound impacts on chemistry, biology, and the environment. This article delves into various aspects of oxygen, from its discovery and properties to its role in human health and the environment. Discovery and History Oxygen was discovered independently by Carl Wilhelm Scheele in Sweden and Joseph Priestley in England, both in 1774. Priestley isolated oxygen by heating mercuric oxide, while Scheele produced it by heating several compounds, including potassium nitrate. Antoine Lavoisier, a French chemist, later named the element "oxygen" in 1777, from the Greek words "oxys" (acid) and "genes" (producer). 1. Triplet Oxygen    - Molecular oxygen (O2) is commonly depicted with a double bond, but in reality, it has two unpaired electrons, making it a diradical. This makes it slightly paramagnetic, meaning it is weakly attracted to magnetic fields. 2. Oxygen's Discovery    - Oxygen was dis...

Understanding the physicochemical properties of drugs is essential for several reasons, each influencing how drugs are absorbed, distributed, metabolized, and eliminated by the body, ultimately affecting their effectiveness and safety. Firstly, these properties play a crucial role in the absorption of drugs. For instance, drugs that are highly soluble in water are generally absorbed more readily through the gastrointestinal tract into the bloodstream. Conversely, drugs that are highly lipophilic can cross cell membranes more easily and may distribute more readily into fatty tissues, including the brain. Secondly, the distribution of drugs throughout the body is influenced by their physicochemical properties. Lipophilic drugs tend to accumulate in fatty tissues, while drugs that are more hydrophilic may remain primarily in the bloodstream or extracellular fluid. This distribution can impact both the efficacy and potential side effects of a drug. Metabolism and elimination are also affec...

This article will help you to test basic knowledge of physical chemistry. We have provides 54 multiple choice questions with  Solve 54 MCQ'S PHYSICAL chemistry for B.Sc. first year students    1. Gaseous state has A. Definite shape and definite volume B. No definite shape and no definite volume C. Definite shape but no definite volume D. No definite shape but definite volume 2. Which of the following is not an assumption of the kinetic molecular theory of gas? A. Attractive forces of the gas molecules are sufficiently strong B. Molecules of the gas have constant and random motion C. Volume of gaseous molecules are negligible D. average kinetic energy of gas molecules is directly proportional to the absolute temperature of the gas 3. In case of an ideal gas compressibility factor is A. One B. Two C. Three D. Zero 4. van der Waal’s equation is for A. ideal gas B. real gas C. perfect gas D. compressed gas 5. The critical temperature of the water is 647 K, which means A. The ...