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Revision Notes for Class 12 Chemistry Unit 15 Polymers
Class 12 Chemistry students should refer to the following concepts and notes for Unit 15 Polymers in Class 12. These exam notes for Class 12 Chemistry will be very useful for upcoming class tests and examinations and help you to score good marks
Unit 15 Polymers Notes Class 12 Chemistry
QUESTIONS AND ANSWERS OF POLYMERS:
VERY SHORT ANSWERS
Q1.WHAT DOES 6, 6 INDICATE IN THE NAME OF NYLON‐ 6,6?
A1.THE TWO MONOMERS (ADIPIC ACID AND HEXAMETHYLENEDIAMINE) CONTAIN 6 CARBON ATOMS EACH.
Q2.WRITE THE MONOMER UNITS OF BAKELITE?
A2.PHENOL AND FORMALDEHYDE.
Q3.WHICH OF THE FOLLOWING ARE ADDITION POLYMERS:TERYLENE,NYLON 66,NEOPRENE,TEFLON
A3.NEOPRENE AND TEFLON ARE ADDITION POLYMERS.
Q4.TO HAVE PRACTICAL APPLICATIONS ,WHY ARE CROSS LINKES ARE REQUIRED IN RUBBER?
A4.CROSS LINKS BIND THE PLANAR POLYMER SHEETS THUS INCREASING ITS ELASTOMERIC PROPERTIES.
Q5.WRITE THE NAME OF MONOMERS OF THE FOLLOWING POLYMER:
[‐C=O‐(CH2)5‐NH‐]
A5. CAPROLACTUM.
SHORT ANSWER AND QUESTIONS.
Q6.WHAT IS A BIODEGRABLE POLYMER?GIVE AN EXAMPLE OF BIODEGRABLE ALIPHATIC POLYMER.
A1.POLYMERS WHICH DISINTEGRATE BY THEMSELVES OVER A PERIOD OF TIME DUE TO ENVIORNMENTAL DEGRADATION BY MICROORGANISMSARE CALED BIODEGRABLE POLYMERS.EXAMPLE –PHBV.
Q7.WRITE THE NAMES AND STRUCTURES OF THE FOLLOWINGPOLYMERS:
a)POLYSTYRENE b)DACRON c)TEFLON
A7. POLYMER MONOMERS AND THEIR STRUCTURES
STYRENE
b)DACRON OHCH2‐CH2OH (ETHYL GLYCOL) AND TERPTHALIC ACID
C)TEFLON
2FC=CF2
Q8.LOW DENSITY POLYETHENE AND HIGH DENSITY POLYETHENE,BOTH ARE POLYMERS OF ETHENE BUT THERE IS MARKED DIFFERENCE IN THEIR PROPERTIES?
A8.BOTH OF THEM ARE DIFFER IN THEIR STRUCTURAL FEATURES.LOW DENSITY POLYETHENES ARE HIGHLY BRANCHED WHILE HIGH DENSITY POLYETHENES CONSIST OF CLOSELY PACKED LINEAR MOLECULES.CLOSE PACKING INCREASES THE DENSITY.
Q9.GIVE ONE EXAMPLE EACH OF THE FOLLOWING POLYMERS:
a)ADDITION POLYMERS
ANS.POLYTHENE
b)CONDENSATION POLYMERS
ANS.NYLON 6 ,NYLON 66
c)COPOLYMERS
A9.BUNA‐S,BUNA‐N
Q10.WHAT IS THE COMMERCIAL NAME OF PMMA?WHAT IS IS USE?
A10.THE COMMERCIAL NAME OF PMMA IS POLYMETHYLACRYLATE IS PERSPEX.IT IS USED AS ASUBSTITUTE OF GLASS.IT IS USED FOR MAKING LENSES,TRANSPARENT DOMES,AIRCRAFT WINDOWS AND SKYLIGHTS.
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CBSE Class 12 Chemistry Unit 15 Polymers Notes
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Notes for Chemistry CBSE Class 12 Unit 15 Polymers
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Unit 15 Polymers Notes for Chemistry CBSE Class 12
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Unit 15 Polymers CBSE Class 12 Chemistry Notes
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Notes for CBSE Chemistry Class 12 Unit 15 Polymers
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