Short Answer TypeGive one good chemical test to distinguish between the following pairs of compounds:
(i) 1 Propanol and 2 Propanol.
(ii) Oxalic acid and benzoic acid.
(i) What are thermoplastics and thermosetting plastics? Give one example of each kind.
(ii) Give one example of a fibrous protein. Name the final product of hydrolysis of proteins. What is denaturation of proteins?
(i) Thermoplastics: These are linear polymers and can be moulded in to desired by heating and then cooling. Ex. Polythene.
Thermosetting plastic: These can not be remoulted again. These are low molecular weight semifluid type polymers. Ex. Urea - formaldehyde.
(ii) Fibrous proteins: Example myosin in muscles. Keratin in Hair nails skin the final product of hydrogen of proteins is amino acids. The process which leads to a change in the physical and biological properties of a protein without affecting its chemical composition is called Denaturation. Example: boiling egg, preparation of cheese from milk.
Give balanced equations for the following reactions:
(i) Benzaldehyde treated with hydrogen cyanide.
(ii) Chlorine is passed through diethyl ether.
(iii) Benzoic acid solution is treated with sodium carbonate.
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