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The nucleus of the element 21 E 45 contains: (1) 45 protons and 21 neutrons (2) 21 protons and 24 neutrons (3) 21 protons and 45 neutrons (4) 24 protons and 21 n
If molecular mass and atomic mass of sulphur are 256 and 32 respectively, its atomicity is: (1) 2 (2) 8 (3 )4 ( 4)16 Ans: 8
Metal carbonyls of transition elements constitute another important class of organometallic compounds. All d-block elements which contain only carbonyl ligands are called homolepti
describe graphical explanation of cryoscopy?
Q. Illustrate Classification of Emulsions? Emulsions are classified as: • Oil-in-water emulsion: This is a colloidal dispersion in which droplets of oil are dispersed in
how to calculate the Fluoride ion concentration by ion meter?
The ratio of the concentration of the products raised to its stoichiometric coefficient to the concentration of the reactants raised to its stoichiometric coeff. Mostly, higher th
High ionisation energy: The high ionisation energy of helium (24.6 eV) makes it a potential gas to be used in plasma source. The nitrogen gas is generally not used as a pla
define s-block properties?
Line imperfection : Displacement with a curved boundary makes a mixed dislocation line at the boundary.
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