Class 12 Chemistry - Chapter Polymers NCERT Solutions | What is a biodegradable polymer? Give an
What is a biodegradable polymer? Give an example of a biodegradable aliphatic polyester.
A polymer that can be decomposed by bacteria is called a biodegradable polymer.
The biodegradable polymer are the polymers which are degraded by the micro-organism within a suitable period so that biodegradable polymers and their degraded products do not cause any serious effects on the environment. They degrade by enzymatic hydrolysis and oxidation. The decomposition reactions involves hydrolysis (either enzymatically induced or by non –enzymatic mechanism) to non- toxic small molecules which can be metabolized or excreted from the body.
The common examples of aliphatic biodegradable polymers are polyglycolic acid(PGA), Polyhydroxy butyrate (PHB), Polyhydroxy butyrates-co-beta hydroxyl valerate( PHBV), Polycaprolactone(pcl), Nylon-2-nylon-6.
These polymers are used mainly for medical goods such as surgical sutures, tissues in growth materials, for controlled drug release, plasma substitutes etc. They are also used in agriculture materials, such as films, seed coatings, fast food wrappers, personal hygiene products etc.
Poly-β-hydroxybutyrate-CO-β-hydroxyvalerate (PHBV) is a biodegradable aliphatic polyester.
More Questions From Class 12 Chemistry - Chapter Polymers
- Q:-
Write the names and structures of the monomers of the following polymers:
(i) Buna-S (ii) Buna-N
(iii) Dacron (iv) Neoprene
- Q:-
Arrange the following polymers in increasing order of their intermolecular forces.
(i) Nylon 6, 6, Buna-S, Polythene.
(ii) Nylon 6, Neoprene, Polyvinyl chloride. - Q:-
Explain the difference between Buna-N and Buna-S.
- Q:-
How are polymers classified on the basis of structure?
- Q:-
Define thermoplastics and thermosetting polymers with two examples of each.
- Q:-
Explain the term copolymerisation and give two examples.
- Q:-
Write the monomers used for getting the following polymers. (i) Polyvinyl chloride (ii) Teflon (iii) Bakelite
- Q:-
How do you explain the functionality of a monomer?
- Q:-
Identify the monomer in the following polymeric structures.
(i)
(ii)
- Q:-
What are the monomeric repeating units of Nylon-6 and Nylon-6, 6?
Popular Questions of Class 12 Chemistry
- Q:-
For the reaction R → P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds.
- Q:-
Write the formulas for the following coordination compounds:
(i) Tetraamminediaquacobalt (III) chloride
(ii) Potassium tetracyanonickelate(II)
(iii) Tris(ethane-1,2-diamine) chromium(III) chloride
(iv) Amminebromidochloridonitrito-N-platinate(II)
(v) Dichloridobis(ethane-1,2-diamine)platinum(IV) nitrate
(vi) Iron(III) hexacyanoferrate(II)
- Q:-
(i) Write structures of different isomeric amines corresponding to the molecular formula, C4H11N
(ii) Write IUPAC names of all the isomers.
(iii) What type of isomerism is exhibited by different pairs of amines?
- Q:-
Why are solids rigid?
- Q:-
Write any two characteristics of Chemisorption.
- Q:-
Write the structures of the following compounds.
(i) α-Methoxypropionaldehyde
(ii) 3-Hydroxybutanal
(iii) 2-Hydroxycyclopentane carbaldehyde
(iv) 4-Oxopentanal
(v) Di-sec-butyl ketone
(vi) 4-Fluoroacetophenone
- Q:-
Which of the ores mentioned in Table 6.1 can be concentrated by magnetic separation method?
- Q:-
Why are pentahalides more covalent than trihalides?
- Q:-
Silver atom has completely filled d orbitals (4d10) in its ground state. How can you say that it is a transition element?
- Q:-
Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring compounds) are insoluble in water. Explain.
Recently Viewed Questions of Class 12 Chemistry
- Q:-
Show how are the following alcohols prepared by the reaction of a suitable
Grignard reagent on methanal?
(i)
(ii)
- Q:-
Discuss the trends in chemical reactivity of group 15 elements.
- Q:-
Write chemical reactions taking place in the extraction of zinc from zinc blende.
- Q:-
Refractive index of a solid is observed to have the same value along all directions. Comment on the nature of this solid. Would it show cleavage property?
- Q:-
Give the significance of a lattice point.
- Q:-
Which is a stronger reducing agent Cr2+ or Fe2+ and why?
- Q:-
A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution.
- Q:-
Compare the chemistry of actinoids with that of the lanthanoids with specialreference to:
(i) electronic configuration
(ii) atomic and ionic sizes
(iii) oxidation stateand
(iv) chemical reactivity.
- Q:-
Low level of noradrenaline is the cause of depression. What type of drugs are needed to cure this problem ? Name two drugs.
- Q:-
Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present ?
5 Comment(s) on this Question
this website helped me very much thanks nanba
this website helped me very much thanks nanba
the biodegradable polymer is ? Tell tell me ans.
Thanks Nanba
Gopal
- All Chapters Of Class 12 Chemistry
- All Subjects Of Class 12