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If the velocity of hydrogen molecule is 5x 10 4 cm sec -1 then its de-Broglie wavelength is: (1) 2 Å (2) 4 Å (3) 8 Å (4)100 Å Ans: 4 Å
How does crystallography help in study of crystal structure
the method used for concentration of tin stone is
Q. Write short note on units of hardness and their relationship. Sol. Units of hardness and their relationship. (1) Parts Per million (ppm): It is defined as t
reactions in a mercury button cell
which coating is better for steel. Tin or zinc?
HALOGENS The halogen group (17) is the biggest electronegative in the periodic table, and all elements readily form halide ions X-. Trends in chemistry resemble those collect in
what is the peculiar behaviour of oxygen?
Structure of liquids: Liquids have a limited degree of short-range order and are most adequately described in terms of a radial distribution function. The probability of findin
Theory of Meta directing group The substituent, S takes electrons from para and ortho positions. So, m-position becomes a position of comparatively high electron density and fu
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