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Which orbital is dumb-bell shaped : (1) s -orbital (2) p -orbital (3) d -orbital (4)f -orbital Ans: p -orbital
The Ca 2+ and Mg 2+ ions in hard water form scum with soap. Therefore they don''t form lather and therefore don''t clean the dirt.
how does salt bridge works??
ionization energy vary in 3d seris of d-block elements,how and why
Phenol (Carbolic acid), C 6 H 5 OH or Hydroxy benzene It was observed by Runge in the middle oil fraction of coal-tar distillation and termed it 'carbolic acid' (carbo = coal, o
Q. Illustrate Strengths of Acids and Bases? Ans. Acids and bases can be classified as strong or weak . If an acid or base is strong, it ionizes completely in water. On
Q. Write an account of soda lime glass and safety glasses. Ans. Soda-Lime Glass or soft glass: It is the ordinary glass in which Na 2 O is added to the melt to oxide on hea
explain resonance with examples.
Number of unpaired electrons in inert gas is: (1) Zero (2) 8 (3) 4 (4) 18 Ans: Zero
The first ionization potentials for Na, K, and Rb are 5.138, 4.341, and 4.166 eV, respectively. Assume that the energy level of the outer electron can be represented by a hydrogenl
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