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The third line in Balmer series corresponds to an electronic transition between which Bohr's orbits in hydrogen: (1) 5 → 3 (2) 5 → 2 (3) 4→ 3
assignments of hydrogen bonding
How viscosity and surface tension help in ascertaining criteria of purity for organic compounds
The nucleus of the element 21E^45 contains
Xanthoproteic test for protein
A 0.5M solution of NaNO2 is made. What is the pH of the solution?
The series limit for Balmer series of H-spectra is: (1) 3800 (2) 4200 (3) 3646 (4) 4000 Ans: 3646
Reactions of Alkaline earth metals with oxygen: Write the reactions of any two elements of group II A with oxygen. Ans. Alkaline earth metals react with oxygen to form corr
The atomic weight is the weight of an atom of a chemical element. For instance, the atomic weight of oxygen is 15.9994 and the atomic weight of hydrogen is 1.0079. Write a script
it is impossibe to synthesise orgnic compounds in the lab since life force is essential for their formation -theory is known as
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