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प्रश्न
Answer the following.
Is synthetic rubber better than natural rubber? If so, in what respect?
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उत्तर
Yes, synthetic rubber is superior to natural rubber.
1. Synthetic rubber has high mechanical strength.
2. It has high abrasion resistance.
3. It is resistant to petroleum, vegetable oils, light as well as heat.
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संबंधित प्रश्न
Write the chemical reaction to prepare novolac polymer.
Write the structures of the monomers used for getting the following polymers
Melamine – formaldehyde polymer
Draw the structures of veronal and thymine.
Answer the following in one sentence.
Identify 'B' in the following reaction:
\[\ce{H2N -(CH2)6 - NH2 + HOOC - (CH2)4 - COOH ->[N2][533 K]}\]'B'
Answer the following.
Match the following pairs:
| Name of polymer | Monomer |
| 1. Teflon | a. CH2 = CH2 |
| 2. PVC | b. CF2 = CF2 |
| 3. Polyester | c. CH2 = CHCl |
| 4. Polythene | d. C6H5OH and HCHO |
| 5. Bakelite | e. Dicarboxylic acid and polyhydoxyglycol |
Answer the following.
Write name and formula of raw material from which bakelite is made.
Write the reaction involved in the formation of:
Bakelite
Nylon 6, 6 is a condensation polymer of hexamethylenediamine and _____________
Monomer of natural rubber is __________
write the structure of the monomer used in natural rubber.
Mention two uses of LDP.
Write the name of one example of each polymer in which following repeating units.
\[\begin{array}{cc}
\ce{(-CF2-CF2-), -[NH-(CH2)5-CO] -, -(CH2-CH-), (-CH2-CH2-)}\\
\phantom{............................}|\\
\phantom{..............................}\ce{CN}
\end{array}\]
Explain vulcanization of rubber.
The following structure represents the polymer:
\[\begin{array}{cc}
\ce{[-C-CH2-NH-C-(-CH2)5 NH -]_{{n}}}\\
\phantom{}||\phantom{.............}||\phantom{................}\\
\phantom{}\ce{O}\phantom{.............}\ce{O}\phantom{................}
\end{array}\]
Which among the following polymers is used for making handles of cooker?
Identify additional polymers from the following.
I. \[\begin{array}{cc}
\ce{-(CH2 - CH -)_{{n}}}\\
\phantom{....}|\\
\phantom{.......}\ce{C6H5}
\end{array}\]
II. \[\ce{-(CH2 - CH = CH - CH2 -)_{{n}}}\]
III. \[\ce{-(CO(CH2)4 - CONH(CH2)6NH -)_{{n}}}\]
IV.
The INCORRECT match for the polymer with its application is:
Which of the following is the monomer of neoprene?
\[\ce{{n} CH2 = CH2 ->[333 K - 343 K][6 - 7 atm, catalyst] X}\]
Which of the following is CORRECT about polymer 'X'?
Which of the following polymers is obtained from chloroprene?
Novolac is obtained from ____________.
Identify the polymer obtained by polymerization of n moles of acrylonitrile.
Which among the following catalysts is used in the preparation of dacron?
Identify the catalyst used in the manufacture of high density polythene.
Which of the following polymer is used to make blankets?
Which of the following polymers is used as insulation for cables?
Name the polymers used in laminated sheets and give the name of monomeric units involved in its formation.
Phenol and formaldehyde undergo condensation to give a polymar (A) which on heating with formaldehyde gives a thermosetting polymer (B). Name the polymers. Write the reactions involved in the formation of (A). What is the structural difference between two polymers?
Which of the following products is formed when benzaldehyde is treated with CH3MgBr and the addition product so obtained is subjected to acid hydrolysis?
The monomer of Teflon is ______.
Which of the following polymers is synthesized using a free radical polymerisation technique?
Nylon threads are made of ______.
Which of the following polymers do not involve cross linkages?
Identify the monomer used to prepare neoprene.
The monomer of natural rubber is ______.
Answer the following.
Name and draw structure of the repeating unit in natural rubber.
Answer the following.
Name and draw structure of the repeating unit in natural rubber.
Name and draw the structure of the repeating unit in natural rubber.
Name and draw the structure of the repeating unit in natural rubber.
Write the preparation of viscose rayon.
Name and draw structure of the repeating unit in natural rubber.
Another name of terylene is ______.
The monomer used in preparation of teflon is ______.
Write the structure and name of monomer of Natural rubber.
Name and draw the structure of the repeating unit in natural rubber.
Write the structure of isoprene and the polymer obtained from it.
Write the structure of isoprene and the polymer obtained from it.
Name and draw structure of the repeating unit in natural rubber.
Write the structure of isoprene and the polymer obtained from it.
Name and draw structure of the repeating unit in natural rubber.
Write the structure of isoprene and the polymer obtained from it.
Write the structure of isoprene and the polymer obtained from it.
