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Q. What is Hydrate Isomerism?
In a compound, water molecules may be present in either coordinated form or as water of crystallisation In the former case water molecules are directly attached to the metal ion, or in the latter case they may occupy lattice sites in a crystal without getting attached to the metal ion. This type of isomerism is known as hydrate isomerism and the physical and chemical properties of hydrate isomers are quite different. As an example, we consider at least three well established isomers of a complex CrCl3.6H2O these are:
(i) [Cr (H20)4Cl2] Cl2H20, a dark green compound where four molecules of water are coordinated to Cr (III) ion and the other two molecules occupy the lattice position..
(ii) [Cr (H20)5CI] Cl2.H20 is blue green in colour and has five coordinated and one lattice molecules of water.
iii) [Cr(H2O) 6[ Cl3 is violent in colour and all the molecules of water are coordinated.
A few other examples are:
[Co (NH3)4(H20)CI]Br2, [Co(NH3)4Br2]CI-H20 and
[Co(NH3)3(H20)2CI]Br:. [Co(NH3)3Br2 (H2O)IBr.H20
Tautomerism - Type of Isomerism (i) The type of isomerism in which a substance exist in two readily interconvertible different structures leading to dynamic equilibrium is know
In the following which substance will have highest boiling point: (1) He (2) CsF (3) NH 3 (4) CHCl 3 Ans: CsF
Difference between DNA and RNA DNA RNA DNA has a double helix structure. RNA comprises a single helix structure.
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The Bohr orbit radius for the hydrogen atom (n=1) is approximately 0.530 Å . The radius for the first excited state (n=2) orbit is: (1) 0.13Å
Q. Composition of the nucleus Since the time of Rutherford, other scientists have learned a significant amount about the fundamental properties about the nucleus of an atom. In
physical properties of acid amide
50ml of 0.1M NH 4 OH ,25ml NH 4 Cl weere used to make a buffer . what is the PH is if Pk b is 4.8? Solution) The given buffer is a base buffer [NH4OH] =[(50*0.1)/75] [NH4Cl] =[(
Complexes
Q. Explain the working of chemical cell ? Ans. A chemical cell can be set up by dipping two different metals in an electrolyte and connecting the two metals with an external
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