21.

i) Write the structure of three ethers with molecular formula C₄H₁₀O

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?

Starting with Grignard reagent, how will you prepare propanoic acid?

What is meant by the lanthanide contraction? write the general electronic configuration of inner transition elements.

Write the IUPAC names of the following:
i) [CO(NH₃)₄SO₄]NO₃
ii) K[Pt(NH₃)Cl₃]

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]

Graphite is anisotropic with respect to conduction of electric current. explain.

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.