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प्रश्न
Write the chemical reaction to prepare novolac polymer.
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उत्तर
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संबंधित प्रश्न
Write any ‘two’ uses of terylene.
Bakelite is the polymer of:
(a) Benzaldchyde and phenol
(b) Acetaldehyde and phenol
(c) Formaldehyde and phenol
(d) Formaldehyde and benzyl alcohol
The Zieglar-Natta catalyst is used in the preparation of _______.
(A) LDPE
(B) PHBV
(C) PAN
(D) HDPE
Choose the correct option from the given alternatives.
Which of the following is made up of polyamides?
Answer the following in one sentence.
Define the term: Vulcanization
Answer the following in one sentence.
What type of intermolecular force leads to high-density polymer?
Answer the following.
Write structure of natural rubber and neoprene rubber along with the name and structure of their monomers.
Answer the following.
Name the polymer type in which following linkage is present.
\[\begin{array}{cc}\ce{- C - O -}\\||\phantom{.....}\\
\ce{O\phantom{.....}}\end{array}\]
Draw the structures of polymers formed from the following monomers
\[\ce{n HOOC–R–COOH + n HO–R'–OH}\]
Answer the following.
Write name and formula of raw material from which bakelite is made.
Identify condensation polymers and addition polymers from the following.
\[\begin{array}{cc}\ce{-(CH2 - CH -)_{n}}\\
\phantom{....}|\\\ce{\phantom{.......}C6H5}
\end{array}\]
Identify condensation polymers and addition polymers from the following.
Attempt the following:
Write the chemical reactions involved in the manufacture of Nylon 6,6.
Answer the following.
Write main specialities of Buna-S, Neoprene rubber?
Nylon 6, 6 is a condensation polymer of hexamethylenediamine and _____________
Write the name of the catalyst used for preparation of high density polythene polymer.
Monomer of natural rubber is __________
Write a chemical reaction for the preparation of the following polymer.
polyacrylonitrile
Write chemical reaction for preparation of the following.
Neoprene
Write the name of one example of each polymer in which following repeating units.
\[\begin{array}{cc}
\ce{(-CF2-CF2-), -[NH-(CH2)5-CO] -, -(CH2-CH-), (-CH2-CH2-)}\\
\phantom{............................}|\\
\phantom{..............................}\ce{CN}
\end{array}\]
Write chemical reactions for the preparation of high-density polythene.
Define rubber.
Which of the following polymer is used in paints?
\[\ce{{n} CH2 = CH2 ->[333 K - 343 K][6 - 7 atm, catalyst] X}\]
Which of the following is CORRECT about polymer 'X'?
Which of the following polymers is obtained from chloroprene?
Which among the following catalysts is used in the preparation of dacron?
Which among the following polymers is an example of addition polymer?
Which of the following pair of compounds is used as monomers for bakelite?
Which of the following polymer is used to make blankets?
Which among the following polymers is used to manufacture chemical containers?
Which among the following is an example of addition polymer?
Which of the following is not a semisynthetic polymer?
The commercial name of polyacrylonitrile is ______.
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 |
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 is not a copolymer?
Which one of the following polymers are prepared by addition polymerization?
Which of the following polymers do not involve cross linkages?
The catalyst used for the polymerisation of olefins is ______.
Which of the following polymer is used for manufacturing of buckets, dustbins, pipes, etc?
Which among the following polymers has high tensile strength and is used to obtain tyre cords?
Which of the following is a polymer of enzyme?
Which of the foolowing polymer is used in the manufacture of insulators.
Answer the following.
Name and draw structure of the repeating unit in natural rubber.
Name and draw structure of the repeating unit in natural rubber.
Name and draw structure of the repeating unit in natural rubber.
Write the structure and name of monomer of natural rubber.
Write the structure of isoprene and the polymer obtained from it.
Name and draw structure of the repeating unit in natural rubber.
Name and draw 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.
Write the structure of isoprene and the polymer obtained from it.
