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Who modified Bohr's theory by introducing elliptical orbits for electron path: (1) Hund (2) Thomson (3) Rutherford (4) Sommerfield Ans: Sommerfield
Q. Explain the working of chemical cell ? Ans. A chemical cell can be set up by dipping two different metals in an electrolyte and connecting the two metals with an external
Define the both - Direct extrusion and Indirect extrusion Direct extrusion: Billet is placed in a container and forced through the die by a piston. Indirect extrusion:
tell me the berzelius hyphothesis in hindi
Methane - Members of Alkanes It is also termed as marsh gas. (i) Industrial method of preparation: Mathane gas is acquired on a large scale from natural gas by liquefactio
Mining of petroleum and Petroleum refining (1) Mining of petroleum: Petroleum deposits takes place at varying depth at different places ranging from 500 to 15000 feet. This is
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Favourable conditions for electrovalency are: (1) Low charge on ions, large cation, small anion (2) High charge on ions, small cation, large anion (3)High charge on ions,
Millikan and Harvey Fletchers oil-drop experiment The original experiment was performed in the year 1909 through Robert Millikan and Harvey Fletcher through balancing the downw
For sodium atom the number of electrons with m=0 will be: (1) 2 (2) 27 (3) 9 (4) 8 Ans: 7
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