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The ratio of the energy of a photon of 2000Å wavelength radiation to that of 4000Å radiation is:
(1) 1/4
(2) 4
(3) 1/2
(4) 2
Ans: 2
Compounds and IUPAC names
The ph of an aqueous solution of Ba(OH)2 is 10 if the ksp of Ba(OH)2 is 1*10^-9 then the concentration of Ba+2 ions in the aqueous solution is Ans) [OH(-)] = 10^(-4) 2.
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