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Write a feature which will distinguish a metallic solid from an ionic solid.
a) Explain 'order of a reaction'.
b) What is an emulsion?
Q. Extraction of f-block element ? As all the lanthanides occur together in nature, their extraction involves two main steps: (i) separation from one another and (ii) reducti
diagonal relationship between Li and Mg
Usually we grudgingly accept that syntheses involving activated EAS reactions will unavoidably yield both ortho and para isomers, and this inefficiency is acceptable in exam and ho
Chemical properties of dihydric alcohol
The number of unpaired electrons in an O 2 molecule is: (1) 0 (2) 1 (3) 2 (4) 3 Ans: 2
The mole (calculation using the mole formula should be included).
The de-Broglie wavelength associated with a particle of mass 10 -6 kg moving with a velocity of 10 ms -1 , is: (1) 6.63 x 10 -22 m (2) 6.63 x 10 -29 m
The electronic configuration of calcium ion ( Ca2 + ) is: (1) 1s 1 , 2s 2, 2p 6 , 3s 2 , 3p 6 , 4s 2 (2) 1s 1 , 2s 2 , sp 6 , 3s 2 , 3p 6 , 4s 1
An element X with the electronic configuration 1s 2 , 2s 2 , 2p 6 , 3s 2 , would be expected to form the chloride with the formula: (1) XCl 3 (2) Xcl 2 (3) XCl
how can the melting point be used to determine the purity of organic compounds
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