Que1:- Explain why p-nitrophenol is more soluble than o-nitro phenol in water.
Ans:- In p- nitrophenol intermolecular hydrogen bond forms with a water molecule and in o-nitrophenol there is no possible intersection of hydrogen bond formation with water molecule hence p-nitrophenol is more soluble than o-nitrophenol.
Que:-2 Explain acetone is more volatile than alcohol.
Ans: Alcohol has strong hydrogen bonding b/w each other which makes it harder to vapourize. In acetone, weak Vander Waal’s forces exist b/w atoms and it boils at very low temperature hence acetone is more volatile than alcohol.
Que.3- What is polymerization?
Ans. The process of joining large number of simple molecules to form huge polymer molecules is known as polymerization.
Que.4- Define the term ‘monomers’.
Ans. Monomer is the simple chemical substance of low molecular weight which can be converted into a polymer and the molecules of monomer has at least two easily reacting position.
Que.5- Define and explain polymer.
Ans. A polymer is defined as the substance having very high molecular weight and is made by joining of large number of simple molecules . Therefore, the polymer molecules have certain structural unit repeating large number of times.
Que.6-Explain why Teflon is a highly chemical reactant?
Ans. Due to the presence of the most electronegative element F in Teflon, there are very strong attractive forces between its different chains. Hence, it possesses extremely high chemical resistance towards most chemicals.
Que.7- What are the monomers of Buna-S.
Ans. Monomers of Buna-S are 75% butadiene and 25% styrene at 50 degrees C in the presence of cumene hydroperoxide as a catalyst.
Que.8- What do you understand by polymer blends?
Ans. A polymer blend is the mixture of two or more polymers, having better properties than the component polymer. For making a polymer blend it is essential that they are compatible with each other.
Que.9- Classify the polymer on the basis of tacticity.
Ans. i. Isotactic polymer ii. Atactic polymer iii. Syndiotactic polymer
Que.10- Classify the polymer on the basis of a number of monomers.
Ans. i. Homopolymer ii. Copolymer