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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
unique properties of colloids
Principle of chromatography - Purification of organic compounds The method of chromatography is based on the difference in the rates at which the components of a mixture move t
during the process of extraction of pure copper from copper pyrite,SiO2 acts as acidic flux which combines with iron oxide(FeO) to form iron silicate(FeSiO3). CuFeS2 + heat ---> Cu
what organic compounds can be separated by simple distillation
how many mole ratios can be obtained from the following equation? Na2S+Cd(NO3)2-2NaNo3+CdS
Covalent Bond Purely electrostatic attractions between ions are nondirectional, but with increasing covalent character the directional properties of valence orbitals become more
The maximum number of unpaired electron can be present in d orbitals are: (1) 1 (2) 3 (3) 5 (4) 7 Ans: 5
emf series and its applications
Chloride of metal is MCl 2 . The formula of its phosphate will be: (1) M 2 PO 4 (2) M 3 (Po 4 ) 2 (3) M 2 (
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