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प्रश्न
Answer the following.
Write name and formula of raw material from which bakelite is made.
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उत्तर
Bakelite is made by condensation of two different monomers:
a. Phenol:
b. Formaldehyde: CH2O
APPEARS IN
संबंधित प्रश्न
Write any ‘two’ uses of terylene.
Write the reactions involved in the preparation of PVC
Bakelite is the polymer of:
(a) Benzaldchyde and phenol
(b) Acetaldehyde and phenol
(c) Formaldehyde and phenol
(d) Formaldehyde and benzyl alcohol
Write the structures of the monomers used for getting the following polymers
Melamine – formaldehyde polymer
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 |
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\[\ce{n HOOC–R–COOH + n HO–R'–OH}\]
Identify condensation polymers and addition polymers from the following.
\[\begin{array}{cc}\ce{-(CH2 - CH -)_{n}}\\
\phantom{....}|\\\ce{\phantom{.......}C6H5}
\end{array}\]
Attempt the following:
Write the chemical reactions involved in the manufacture of Nylon 6,6.
Attempt the following:
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a. Neoprene
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Write the reaction involved in the formation of bakelite.
Attempt the following:
What is meant by LDP and HDP? Mention the basic difference between the same with suitable examples.
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Answer the following.
Is synthetic rubber better than natural rubber? If so, in what respect?
Answer the following.
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Monomer used for preparation of polyacrylonitrile is _____________
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Monomer of natural rubber is __________
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polyacrylonitrile
Write chemical reaction for preparation of the following.
Buna-S
Write the name of one example of each polymer in which following repeating units.
\[\begin{array}{cc}
\ce{(-CF2-CF2-), -[NH-(CH2)5-CO] -, -(CH2-CH-), (-CH2-CH2-)}\\
\phantom{............................}|\\
\phantom{..............................}\ce{CN}
\end{array}\]
Which of the following is used as a substitute for wool?
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.
How many isoprene units are present in abscisic acid?
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Which of the following is the monomer of neoprene?
Select the CORRECT match for both the polymers.
\[\ce{{n} CH2 = CH2 ->[333 K - 343 K][6 - 7 atm, catalyst] X}\]
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Which among the following catalysts is used in the preparation of dacron?
Which of the following polymers is prepared by using phenol?
Which of the following polymer is used to make blankets?
Which among the following polymers is used to manufacture chemical containers?
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Which among the following is an example of addition polymer?
Match the polymers given in Column I with the type of linkage present in them given in Column II.
| Column I | Column II |
| (i) Terylene | (a) Glycosidic linkage |
| (ii) Nylon | (b) Ester linkage |
| (iii) Cellulose | (c) Phosphodiester linkage |
| (iv) Protein | (d) Amide linkage |
| v) RNA |
Which of the following products is formed when benzaldehyde is treated with CH3MgBr and the addition product so obtained is subjected to acid hydrolysis?
Trans - form of poly isoprene is:-
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Which of the following polymers do not involve cross linkages?
Which among the following polymers has high tensile strength and is used to obtain tyre cords?
Answer the following.
Name and draw structure of the repeating unit in natural rubber.
Answer the following.
Write the structure of isoprene and the polymer obtained from it.
Write the structure of isoprene and the polymer obtained from it.
Name the compound which reacts with formaldehyde to produce ethyl alcohol.
Another name of terylene is ______.
Name and draw structure of the repeating unit in 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.
Write the structure of isoprene and the polymer obtained from it.
Name and draw the structure of the repeating unit in natural rubber.
Name and draw structure of the repeating unit in natural rubber.
Write the structure of isoprene and the polymer obtained from it.
