Short Answer TypeWrite the equations involved in the following reactions:
(i) Reimer - Tiemann reaction
(ii) Williamson’s ether synthesis
Define thermoplastic and thermosetting polymers. Give one example of each.
Thermoplastic Polymers: These are the linear or slightly branched long chain molecules capable of repeatedly softening on heating and hardening on cooling. These possess intermolecular forces of attraction intermediate between elastomers and fibres. For e.g. Polythene, Polyvinyl etc.
Thermosetting Polymers: These are cross-linked or heavily branched molecules which on heating undergo extensive cross-linking in moulds and again become invisible. These cannot be reused. For e.g. bakelite, urea-formaldehyde resins etc.
What is a biodegradable polymer? Give an example of biodegradable aliphatic polyester.
Shanti, a domestic helper of Mrs. Anuradha, fainted while mopping the floor. Mrs. Anuradha immediately took her to the nearby hospital where she was diagnosed to be severely ‘anaemic’. The doctor prescribed an iron rich diet and multivitamins supplement to her. Mrs. Anuradha supported her financially to get the medicines. After a month, Shanti was diagnosed to be normal.
(i) What values are displayed by Mrs. Anuradha?
(ii) Name the vitamin whose deficiency causes ‘pernicious anaemia’.
(iii) Give an example of a water soluble vitamin.
Give reasons for the following:
(i) Ethyl iodide undergoes SN2 reaction faster than ethyl bromide.
(ii) (±) 2-Butanol is optically inactive.
(iii) C -X bond length in halo benzene is smaller than C -X bond length in CH3- X.
(i) What class of drug is Ranitidine?
(ii) If water contains dissolved Ca2+ ions, out of soaps and synthetic detergents, which will you use for cleaning clothes?
(iii) Which of the following is an antiseptic?
0.2% phenol, 1% phenol
Long Answer Type(a) State Raoult’s law for a solution containing volatile components.
How does Raoult’s law become a special case of Henry’s law?
(b) 1·00 g of a non-electrolyte solute dissolved in 50 g of benzene lowered the freezing point of benzene by 0·40 K. Find the molar mass of the solute. (Kf for benzene = 5·12 K kg mol-1)
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