Chemistry One-Liners for various competitive examinations
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Here are some important Chemistry one-liners for students competing for various exams
Watch some of the important Chemistry Bits below.
1-Ionisation enthalpy- It is the minimum energy required to remove an electron from an isolated gaseous atom of an element to form a positive ion.
2-Electronegativity- It is the ability of an atom to attract the shared pair of electrons towards it.
3-Electron gain enthalpy- It is the energy released by an element when an extra electron is added to its neutral gaseous atom.
4-REDOX REACTION- A reaction which involves oxidation and reduction occurring simultaneously together are called redox reaction.
5-Batteries- These convert chemical energy into electrical energy. Two types of batteries are used, i.e. primary and secondary
6-Fuel Cells- These cells convert energy from the combustion of fuels such as Hydrogen, Carbon Monoxide, Methane directly into electrical energy
7-A catalyst is a substance which alters the rate of reaction. Catalysts are specific in their action. Its main function is to decrease the activation energy.
8- Metals are generally good conductors of heat and electricity
9-Alloys are homogeneous mixtures of metals and cannot be separated into their components by physical methods
10-The bond formed by the transfer of electrons from one atom to another is called electrovalent bond and the compound is called electrovalent compound or an ionic compound.
11-The phenomenon in which a substance mixes with another because of molecular motion, even against gravity is called diffusion
12-The process of separation of various constituents/ fractions of petroleum is known as refining.
13-Urea was the first organic compound prepared in the laboratory. Urea was prepared by Wohler (1828) from inorganic compound i.e. ammonium cyanate
14-Acetic acid was the first organic compound synthesized from the elements by Kolbe
15-Biochemical Oxygen Demand (BOD) is the total amount of oxygen (in mg) required by microbes to decompose the organic matter present in 1L of the water sample.
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