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Q. Define about Crystal Field Theory?
This theory is based on two main assumptions. First, all the ligands are considered as point (negative) charges. It means that the size and shape of ligands are not taken into account. Second, the bonds between the metal ion and the ligands are purely electrovalent in nature. With these assumptions, the theory sets on to find the effect of these point charges (ligands) on the energy levels (s, p, d, f) of the metal ion. This effect is also evaluated in terms of force of repulsion only and does not concern itself with the force of attraction.
Q. Explain Preservation by Preservatives? Preservatives, as you may already know, belong to a class of food additives that extend shelf life by inhibiting microbial growth, o
Q. Explain about coordination compound? These compounds are usually formed by the donation of pair of electrons to the central metal ion by the group of ions or molecules. The
Q. What is Calcinations process? This is fie method of heating the concentrated ore in a limited supply of air to a high temperature but under the fusion temperature. In calcin
list of all isotopes
what is wurtz reaction?
Q. Show General Characteristics of group16? The valence shell electronic configuration of Group 16 elements is ns 2 , ns 4 . These elements tend to gain inert gas configuration
Post-harvest treatments Certain post-harvest treatments to fruits and vegetables can bring down spoilage significantly. A wide range of chemicals used to control post-harvest d
The maximum number of electrons that can be accommodated in the M th shell is: (1) 2 (2) 8 (3) 18 (4) 32 Ans: 18
Action of grignard reagents on carbonyl compounds with examples
Which of the following reduces the activation energy of a chemical reaction?
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