I. (c) Polythene
Phenol is made to react with formaldehyde. Ebonite is
Is it thermoplastic or thermosetting plastic? (d) coordination reaction between monomers, Question 3.
However PVC is a fibrous polymer. Bakelite is a polymer made up of the monomers phenol and formaldehyde. (a) 1 (d) Protein, Question 26. The chemical formula of bakelite can be written as (C6H6O-CH2OH)n. Some important properties of bakelite are listed below. Teflon, PVC and neoprene are all Bakelite is a thermosetting polymer and has a high strength.
In general, phenol taken in excess acts as the cross-linking agent. (c) synthetic rubber
3. copolymer (d) All of these, Question 9. (a) PMMA Long Answer Type Question. Which of the monomer of neoprene in the following?
(d) Benzoic acid and para HO—(C6H4)—OH.
• 4. homopolymer, Direction(Q.NOs.40-41): Each of these questions contains two statements: Assertion and Reason. Why?, yar koi insta pe bhi aa jaomai bore ho rhi hu..., कक्षा प्लस अभियंत्रण इतिहास संदीप अदामस थीकक्षा प्लस अभियंत्रण इतिहास संदीप अदामस थी . Thermosetting polymer,bakelite is formed by the reaction of phenol with
(d) polythene, Question 19. Which of these is not a monomer for a high molecular mass silicone polymer? (b) Nylon- 6, 6
Purification and Characterisations of Organic Compounds. (a) thermoplastic Which of the following is an addition polymer? Of the following which one is classified as polyester polymer?
(c) Thiokol Bakelite is a polymer made up of the monomers phenol and formaldehyde.
Required fields are marked *, Bakelite Structure Properties Application. (d) natural rubber, Question 30. Which of the following structures represents neoprene polymer? Question 40. (c) Ionic bonding (c) styrene and butadiene Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. These intermediate condensation products are used as resins in different industries. Which one of the following is not a condensation polymer? (a) teflon Ethylene glycol+Phthalic acid Interparticle forces present in nylon-6,6 are
Assertion: Bakelite is formed when novolac is heated with formaldehyde and it is a thermosetting polymer. Glyptal polymer is obtained from glycol by reacting with (d) sulphonation, Question 28. Which of the following represents the example of homopolymer?
If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. (c) lithium tetrachloride and triphenyl aluminium
Reason : Network polymers have high molecular mass. The correct answer is (c) Polyvinyl chloride This phenol-formaldehyde resin is a thermosetting polymer. Answer: (B) Bakelite is a thermosetting polymer. (b) condensation polymers
Question 41. Which one of the following is an example of thermosetting polymer?
Answer/Explanation.
What is Bakelite? Glycine+amino caproic acid
Question 52. Three dimensional molecules with cross links are formed in the case of a
Which of the following organic compounds polymerises to form the polyester dacron? asked Aug 16, 2018 in Chemistry by Sagarmatha (54.4k points) In the following questions a statement of assertion followed by a statement of reason is given. Cellulose acetate is a
III. (c) Polyethylene Among cellulose, polyvinyl chloride, nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest in Bakelite is a thermosetting polymer which are cross linked or heavily branched molecules, which on heating undergo extensive cross-linking in moulds and again become infusible. Your email address will not be published.
Copolymer is (c) Dacron Assertion: Bakelite is formed when novolac is heated with formaldehyde and it is a thermosetting polymer. Shape material to form a cup or bowl.
2. polyamide
What are the Desirable Properties of Bakelite? Reason: Bakelite is infusible solid mass.
We cannot deny the presence of polymers in our lives. Question 44. Here both the assertion & reason is correct & reason is also valid for the given statement, as Bakelite is a thermosetting polymer it is easily used in making switch & boards . (c) PHBV
(A) Melamine (B) Terylene. (c) Rubber (d) synthetic plastic, Question 7. (a) natural polymer (d) All of the above, Question 20.
AIEEE 2011: Thermosetting polymer, Bakelite is formed by the reaction of phenol with: (A) CH3CHO (B) HCHO (C) HCOOH (D) CH3CH2CHO.
Explain the difference between thermoplastics and thermosetting plastics. (c) Polystyrene (a) Starch
Bakelite is resistant to heat and chemical actions and also it is non-flammable.
They are also resistant to several destructive solvents. These plastics cannot be softened again on heating.
(d) dynel, Question 17. Reason: In thermosetting plastics, the polymeric chains are held together by strong covalent bonds.
(a) Hydrogen bonding (d) None of these, Question 29.
(b) 2
Question 42.
(b) Cl2C=CH2 Which factor imparts crystalline nature to a polymer like nylon? (b) polyacrylonitrile The correct answer is (d) titanium iso-peroxide, Question 12.
…, of the sulphuric acid is used as an electrolyte (density = 1 294gn/1)the battery helds 3.5L of the acid.
(d) 4, Question 33. (c) 3 (a) nylon-6,10
Codes (d) None of the above, Question 8. Synthetic polymers do not degrade in the environment for a long time.
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