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Q. Define the Spectrochemical series?
Spectrochemical series helps us in renationalising the differences in the spectral properties of complexes. As the strength of the crystal field created by the ligands & increases, the frequency of absorption of light by the complex would also increase. Absorption of high frequency radiations means that light of lower frequency will be transmitted and will be responsible for the particular dour of the complex. It thus explains as to why the colours of a series of complexes of one particular metal ion, in the same oxidation state having the - same geometry, could be different. For example, the following four octahedral compounds of Co3 ion show different colours which are in accordance with spectrochemical series.
Complex D0 (em-1) colours
[Co (C2O4)3]3- 18,000 Dark green
[Co (H2O)6]3+ 18.200 Blue
[Co (NH3)6]3 + 22.900 Golden-brown
[Co (CN)6]3 - 33.500 Yellow
Q. What do you understand by dissolved oxygen in water? How does it create trouble in boiler? Give chemical methods with suitable reactions to remove it from the water. Ans.
How many KCal of heat are liberated when 48.0 grams of iron are burned to form Fe2O3 at standard state conditions? (Change of Hf^0 of Fe2O3 is -197 kCal/Mole )
Tritium is the isotope of: (1) Hydrogen (2) Oxygen (3) Carbon (4)Sulpher Ans: Hydrogen
Prefix - IUPAC System of Naming Organic Compounds There are several groups that are not regarded as functional groups in the IUPAC name of the substance. These are linked as su
Q. Illustrate Egg White Foams? Egg white foams when whipped or beaten, the air gets entrapped in the liquid present, and an interfacial tension is established between the ai
How are the following sole produced (a) Sulphur sol (b) Collodion
Who modified Bohr's theory by introducing elliptical orbits for electron path: (1) Hund (2) Thomson (3) Rutherford (4) Sommerfield Ans: Sommerfield
electrode system
The total number of unpaired electrons in d- orbital's of atoms of element of atomic number 29 is: (1) 10 (2) 1 (3) 0 (4)5 Ans: 0
hittorf rule
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