How can the following conversation be brought about:
i) Acetaldehyde to acetaldehyde phenyl hydrazine.
ii) Benzoic acid to aniline.
iii) Methyl chloride to acetone.
iv) Benzene to benzene diazonium chloride.
i) Glycerol (propane 1,2,3 triol) is more viscous than ethylene glycol ( ethane 1,2, diol). Explain.
ii) How can urea be detected by Biuret test?
What is meant by the lanthanide contraction? write the general electronic configuration of inner transition elements.
The solubility product of PbCl2 at 298K is 1.7 x 10-5. Calculate the solubility of PbCl2 in g/lit. at 298K.
Atomic weight: [Pb=207 and Cl=35.5]
In a body centred and face centred arrangement of atoms of an element, what will be the number of atoms present in the respective units of cell? Justify your answer with calculation.
Number of atom in one face centred cubic unit cell can be determined:-
8 Corners atom x 1/8 per corner atom = 1/8 x 8 = 1 atom
6 face centered atom x 1/2 atom per unit cell = 1/2 x 6 = 3
therefore,
Total number of atoms per units cell = 4 atoms
Number of atom in body centered cubic cell:
8 corners atom x1/8 per corner atom = 8 x 1/8 = 1
1 body center atom = 1 x 1 = 1 atom therefore, total number of atoms present per unit cell = 2 atoms