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what is abnormal molecular mass
why lithium and beryllium markedly differ from other members of their respective groups?
A transition metal X has a configuration [Ar] 3d 4 in its +3 oxidation state. Its atomic number is: (1) 25 (2) 26 (3) 22 (4) 19 Ans: 25
The formation of energy bonds in solids are in accordance with: (1) Heisenberg's uncertainty principle (2)Bohr's theory (3 )Ohm's law (4) Rutherford's atomic model
0.265g of an organic compound produced on evaporation 102cm^3 of vapour at 373k and 775mmHg.percentage composition of the constituents elements are 92.24 % of carbon and 7.76% of h
'Cohesive energy' : In a chemical bond, it is the energy needed to dissociate a solid into isolated atoms or molecules as appropriate.
(a) Give short notes of two basic types of sewerage system for collection of wastewater and surface water from built-up areas. (b) Many countries have included wastewater reuse
Monosaccharides - Biomolecules These are very simple one unit non-hydrolysable sugars. They have the common formula C n H 2n O n where n changes from 3 to 9 carbon molecules.
The shape of s -orbital is: (1) Pyramidal (2) Spherical (3)Tetrahedral (4)Dumb-bell shaped Ans: Spherical
where is the asterisk located
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