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Q. Define the Planck constant? The energy of a photon ( E photon) of a certain frequency (violet) is able to be calculated by using the following equation in which h represen
Q. Describe the manufacturing process of glass. Ans. Manufacturing process of glass 1. Melting: Raw materials, in proper properties mixed with pellets, are finally po
(a) De?ne surveying. Brie?y describe about chain and accessories. (b) Sketch the plan and suitable section of a single room having 5.0 m X 4m size and 3m height. Assume the ba
molecular chlorine and molecular fluorine combine to form a gaseous product.Under the same conditions of temperature and pressure it is found that one volume of Cl2 reacts with thr
Q. Determine Atomic Number and Mass Number? One of the four naturally taking place isotopes of chromium has a mass number of 53. Determine the number of electrons, protons and
Q. Determine the Uniqueness of Carbon? Ans. Carbon forms a very large number of compounds--over 4,000,000. This is far more than the number of compounds of all other eleme
list the physical properties of two examples of metallic and non metallic elements
It is a part of chemistry which deals with the organic compounds formed by carbon , hydrogen ,oxygen.
An aqueous solution has a hydroxyl concentration of 1.75 x 10^-7mol/L. Find the concentration of hydrogen ions in this solution.
Reaction of ammonia with diborane at 475K gives a compound B3N3H6 known as borazine or borazole: Borazine is best prepared by reducing B-trichloroborazme with sodium borohy
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