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Polymer deals with macromolecular chemistry, covering the formation, characteristics, and daily applications of natural and synthetic polymers like nylon and PVC.
Correct Answer:
(C) Isoprene
Polymerization is the process of joining together a large number of small molecules to make a very large molecule. The reactants (i.e. the small molecules from which the polymer is constructed) are called monomers and products of the polymerization process are called polymers. Natural rubber is the natural polymer of isoprene. Isoprene is a colourless liquid made by destructive distillation of petroleum.
Ques: 2
Which of the following is not a Natural polymer?
Correct Answer:
(D)
Nylon
Wool, silk, leather are the natural polymers but nylon is not a natural polymer.
Ques: 3
Which of the following is not a natural polymer –
Correct Answer:
(A) Ghee
Ghee is not a polymer while rest all are the natural polymers.
Ques: 4
Cellulose and starch both are made up of :
(a) (+) – glucose
(b) (–) – fructose
Correct Answer:
(A) Both
Cellulose is the most commonly found organic compound, biopolymer and polysaccharide on the earth. Each of these molecules contains several hundred to thousands glucose molecules in the form of an inosculated homopolymer series. Starch plants have structural polysaccharides which contain two types of homopolysaccharide molecules made of glucose cells – 10 to 30 percent amylase and 70 to 90 percent amylopectin molecules.
Ques: 5
The most abundantly found organic compound in nature is –
Correct Answer:
(D)
Cellulose
Cellulose is a form of carbohydrate. It is a polysaccharide consisting of a linear chain of several hundred to many thousands of β linked D-glucose units. It is the chief constituent of cell walls in living organisms. Wood is mostly cellulose, making cellulose the most abundant type of organic compound on the earth. Its purest natural form is cotton.
Ques: 6
Which of the following is an example of a non-cellulosic fibre?
Correct Answer:
(D)
Nylon
Rayon, cotton, hemp, jute and linen are made of cellulose, while nylon, polyesters etc. are non-cellulosic fibres.
Ques: 7
Which of the following polymer is NOT a thermoplastic?
Correct Answer:
(B) Neoprene
Among the given options, neoprene is not a thermoplastic. Neoprene is a family of synthetic rubbers that are produced by polymerization of chloroprene. It is used to prepare pipes, belts and other things. It is also called polychloroprene or pc-rubber.