JEE Advanced (Single Correct Type): Polymers | Chapter-wise Tests for JEE Main & Advanced PDF Download

Q.1. Any substance made up of multiple repeating units called polymers is referred to as a polymer.
(a) Mers
(b) Plastic
(c) Resins
(d) Blocks

Correct Answer is option (a)
Any substance made up of multiple repeating units, known as mers, is referred to as a polymer. Polymers are made up of a large number of molecules connected together to form long chains.

Q.2. Which of the following is not a thermoplastic example?
(a) Polyvinyl chloride
(b) Epoxy
(c) Polyesters
(d) Nylon

Correct Answer is option (b)
Epoxy is not a thermoplastic material. Thermoplastics include polyvinyl chloride, nylon, and polyesters.

Q.3. Which of the following does not belong in the category of natural polymers?
(a) Cellulose
(b) Starch
(c) Rayon
(d) RNA

Correct Answer is option (c)
Natural polymers are made up of polymers derived from plants and animals. Rayon is a semi-synthetic polymer that is created by chemically altering a natural polymer. Cellulose acetate polymer or rayon is produced by acetylation of cellulose with acetic anhydride in sulphuric acid.

Q.4. The crystallinity rises as the polymer’s brittleness _______.
(a) Increases
(b) Remains constant
(c) Moderate
(d) Decreases

Correct Answer is option (d)
The brittleness of the polymer increases as the crystallinity of the polymer increases. The polymers’ strength and chemical resistance improve as well.

Q.5. Short-chained, low-molecular-weight polymers are known as liquid or gas polymers.
(a) High-polymers
(b) Oligo-polymers
(c) Copolymers
(d) Homopolymers

Correct Answer is option (b)
Oligo-polymers are liquid or gaseous polymers with very short chains. Their molecular weight is in the range of 100 g/mol. The molecular weights of high-polymers range from 10000 to 1000000 g/mol.

Q.6. Which of the following polymers does not fall within the configuration category?
(a) Cross-linked
(b) Atactic
(c) Syndiotactic
(d) Isotactic

Correct Answer is option (a)
The category of configuration does not include cross-linked polymers. The categories of configuration include syndiotactic, atactic, and isotactic. Within a macromolecule, tacticity refers to the relative stereochemistry of neighbouring chiral centres.

Q.7. Which of the following criteria does not apply to polymers?
(a) Source
(b) Structure
(c) Method of preparation
(d) Number of monomers

Correct Answer is option (d)
Polymers are very massive molecules made up of a large number of simple units, or monomers, joined together. They are classed primarily based on their source, structure, synthesis mode, and molecular forces.

Q.8. The synthesis of which of the following polymers necessitates the loss of tiny molecules on a regular basis?
(a) Polythene
(b) Nylon-6,6
(c) Buna-N
(d) Buna-S

Correct Answer is option (b)
Condensation polymers are created through a series of condensation reactions between two bi-functional or tri-functional monomeric units, as well as the loss of minor molecules such as water, alcohol, and HCl. The condensation of hexamethylenediammine and adipic acid produces nylon-6,6, which is devoid of water molecules.

Q.9. The polymer absorbs ______ and expands.
(a) Water
(b) Ether
(c) Ethyl alcohol
(d) Methanol

Correct Answer is option (a)
The polymer soaks up the water and expands. Slowly, the polymer dissolves into the viscous, heterogeneous polymer solution.

Q.10. Which of the following stages of addition polymerization is not one of them?
(a) Initiation
(b) Recrystallisation
(c) Termination
(d) Propagation

Correct Answer is option (b)
Similar monomers are joined to produce long chain molecules in the addition polymerization process. Initiation, propagation, and termination are all part of the process. A chain reaction polymerization is another name for this technique.

Q.11. Trans-form of polyisoprene is
(a) Guttapercha
(b) Hydrochloride rubber
(c) Buna-N
(d) Synthetic rubber

Correct Answer is option (a) 
Guttapercha rubber is very hard horny material consisting of trans 1, 4 - polyisoprene polymer

Q.12.  Wash and wear clothes are manufactured using
(a) Nylon fibres
(b) Cotton mixed with nylon
(c) Terylene fibres
(d) Wool fibres

Correct Answer is option (c)
The fibre of terylene is highly crease - resistant, durable and has low moisture content. It is also not damaged by pests like moths and mildew. It is therefore used for the manufacture of wash and wear fabrics. It is also blended with cotton (Terycot) and wool (Terywool) to increase their resistance to wear and tear.

Q.13. In the manufacture of polythene by the Ziegler process using ethylene, the temperature for proper polymerisation required is
(a) Below 10^o C
(b) 10^o to 50^o C
(c) 50^o to 80^o C
(d) 80^o to 140^o C

Correct Answer is option (c)
The reaction carried out at temp. 50°-80°C.

Q.14. High density polyethylene(HDPE) can be prepared from ethylene by
(a) Ziegler-Natta process
(b) Heating with peroxides
(c) Condensing in sealed tubes
(d) Condensing with styrenes

Correct Answer is option (a)
HDPE is prepared by co-ordination polymerization which occurs through the intermediate formation of co-ordination complexes. For example, ethylene first forms a coordination complex with the transition metal titanium by donating its π -electrons. The p complex thus formed then reacts stepwise with a large number of ethylene molecules ultimately leading to the formation of a polymer. The polythene so obtained has high density (0.97 g / cm³ ) and higher m.pt. (403K) as compare to LDPE (density- 0.92 g / cm³ and m.pt. 384K)

Q.15. Nylon-6 is
(a) Elastomer
(b) Orlon  
(c) polyester
(d) Perlon

Correct Answer is option (d)
Perlon is Nylon-6 or polycaprolactam is a polymer developed by Paul Schlack.

Q.16. Styrene at room temparature is 
(a) Solid 
(b) Liquid 
(c) Gas 
(d) Colloidal solution

Correct Answer is option (b)
Styrene at room temperature is liquid.

Q.17. Which one of the following can be used as monomer in a polymerisation reaction 
(a) CH₃CH₂Cl
(b) CH₃CH₂OH
(c) C₆H₆
(d) C₃H₆   

Correct Answer is option (d)

Q.18. The Zieglar-Natta catalysts are
(a) Stereospecific
(b) Non-metallic complexes
(c) Gaseous catalysts
(d) Universal in all polymerisation reactions

Correct Answer is option (a)
Zieglar Natta catalyst is a mixture of TiCl₄ and (C₂H₅)₃ Al used in the synthesis of stereoregular polymers.

Q.19. Melamine is
(a) Gas
(b) Yellow liquid
(c) White crystalline solid
(d) Colloidal solution

Correct Answer is option (c)
Melamine is the phenol-urea resin which are white crystalline solid.

Q.20. Glyptal is a
(a) Viscose rayon
(b) Nylon
(c) Polystyrene
(d) Alkyd resin

Correct Answer is option (d)
Glyptal is a polymer of phthallic acid and Glycol.