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Chemical Equilibrium Quiz Online
Chemical Equilibrium concepts are essential to learning for every level in chemistry courses. Here, we have compiled many Chemical Equilibrium quizzes free for students of grades 11 and 12. We hope you will find this very useful for your regular exam preparations and entry tests at undergraduate levels, particularly for medical and engineering students (MDCAT,…
History of atom | John Dalton’s atomic theory
According to Greek philosophers, matter is composed of very small particles which cannot be further divided. DEMOCRITUS (460-370BC) named these particles as atoms derived from a Greek word “ATOMOS” which mean indivisible. The ideas of Greek philosophers were not experimental based. In the late 17th century, the quantitative analysis of many substances disclosed that they…
Wave-Particle Nature of Matter
According to the Planck’s Quantum theory of radiations light shows a dual character, i.e., it behaves both as a material particle and as a wave. This idea was extended to matter particles in 1924 by Louis de-Broglie. According to de-Broglie, all matter particles in motion have a dual character. It means that electrons, protons, neutron,…
Molar Volume of a Gas Definition
The volume of one mole of an ideal gas at standard temperature and pressure is called molar volume of a gas and is equal to 22.414 dm3 at STP (Standard temperature & pressure) & 24 dm3 at RTP (Room temperature & pressure). Explanation: At standard temperature and pressure: 2 g of hydrogen (H2) = 1…
Stock System Chemistry
The German chemist Alfred Stock proposed the Stock System Chemistry of nomenclature in 1919 for use in the naming of binary compounds, being, with some modifications, universally adopted. This type of inorganic nomenclature consists of naming the compounds using Roman numerals to indicate the oxidation states of some of the compound elements. These Roman numerals…
