CLASS XII IMPORTANT CHEMISTRY POLYMERS ONE WORD QUESTION ANSWER

1. What is the name given to the process of formation of polymers from respective monomers?

2. Identify the type of polymer.

           A-B-B-A-A A-B -A
3. Name the polymer used for making non-stick utensils.
4. Which polymer is used in making commercial fibres as orlon or acrilan?
5. Natural rubber is heated with sulphur to make it more elastic and hard. What is the process known as?
6. Name the polymer obtained by condensation polymerization of ethylene glycol and terephthalic acid.
7. Name the polymer used for making automobile tyres.
8. Which free radical generating initiator is used in the polymerization of ethene?
9. Which linear polymer is used in paints?
10. Name the polymer having phthalic acid and ethylene glycol as its monomers.
11. Give the name of monomer of Teflon.
12. Give an example of a condensation polymer,
13. Give an example of branched chain polymer.
14. What type of bonds are present between linear polymeric chains in cross-linked polymers?
15. Which of the following polymer can be easily moulded on heating?
Polystyrene, Polyester, Neoprene, Teflon
16. Out of LDP and HDP, which is more flexible?
17. Name the addition polymer of acrylonitrile.
18. What is the full form of PTFE?
19. Give an example of biodegradable aliphatic polyester.
20. Write the name of monomer of neoprene.
21. What is the functionality of adipic acid?
22. Name a synthetic polymer, which is an amide
23. Can an enzyme be called a polymer?
24. In which of the following polymer, intermolecular forces are weakest?
Terylene, Polythene. Neoprene.
25. Which is the thermosetting polymer that is used for making switch boards?
26. On the basis of forces between their molecules in a polymer, to which class does nylon-6,6 belong?
27. Give an example of an elastomer used for storing oil and solvents.
28. Which of the following is a fibre?
      Neoprene, Nylon, PVC.



ANSWERS
1. Polymerization                  4. Polyacrylonitrile (PAN)                      2. Copolymer
3. Teflon                                6. Terylene or Dacron                           7. Buna-S
5. Vulcanization                    9. Novolac                                            13. Low density polythene
11. Tetrafluoroethene           14. Covalent                                          8. Benzoyl Peroxide
10. Glyptal                           12. Nylon-6,6                                       15. Polystyrene
18. Polytetrafluoroethene     22. Nylon-6,6                                      17. Polyacrylonitrile
20. Caprolactam                  16. LDP                                               19. PHBV
21. Chloroprene                   23. Yes                                                27. Buna-N
24. Neoprene                       25. Bakelite                                         26. Fibres
28. Nylon

Class XII Important Questions BIOMOLECULES

1. Name the water insoluble component of starch.

2. Which linkage holds monosaccharide units in polysaccharide?
3. What is the name given to the change of specific rotation of sugar?
4. Name a reagent used to check reducing nature of carbohydrates.
5. How many -OH groups are present in molecule of glucose?
6. What is the general term used for a monosaccharide containing six carbon atoms?
7. Name the product formed when glucose reacts with HCN.
8. Which optical nature is signified by + sign in D-(+)-glucose molecule?
9. Which of the following is not a reducing sugar?
Glucose, Maltose, Sucrose, Lactose
10. Which carbohydrate cannot be digested by human digestive system?
11. Which sugar is commonly known as milk sugar?
12. Name the component of starch that is insoluble in water.
13. In aqueous solution, amino acids exist as a dipolar ion. What is the name given to this dipolar ion
14. Which biomolecules can acts as biological catalyst?
15. Name the protein present in hairs.
16. Which structure of proteins remain unaffected during denaturation?
17. Which linkage joins two amino acids?
18. Name a globular protein that is secreted by pancreas.
19. Which amino acid does not show optical activity?
20. Which secondary structure of proteins is more stable?
21. Deficiency of which vitamin causes convulsions?
22. Which vitamin we get from exposure to sunlight?
23. Deficiency of which vitamin causes night- blindness?
24. Name a rich source of vitamin-C.
25. Name the product formed when glucose reacts with bromine water.
26. Which base is present in RNA but not in DNA?

27. Which nucleic acid is responsible for protein synthesis?
28. Which linkage is found in nucleotides?
29. Give an example of an essential amino acid.
30. What is the ultimate product of digestion of proteins?

ANSWER:

1. Amylopectin   2. Glyosidic         3. Inversion         4. Tollen's reagent
5. Five                 6. Hexose                       7. Cyanohydrin   8. Dextrorotatory
9. Sucrose           10. Cellulose                  11. Lactose         12. Amylopectin
13. Zwitter ion    14. Proteins / Enzymes  15. Keratin          16. Primary         

17. Peptide linkage                                    20. a-helix           18. Insulin           

19. Glycine                   21. Vitamin B6    24. Amla               22. Vitamin-D      

23. Vitamin A      25. Gluconic acid         26. Uracil              27. RNA              

28.Phosphodiester linkage                       29. Valine         30. Amino acids