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प्रश्न
Write the chemical reaction to prepare novolac polymer.
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उत्तर
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संबंधित प्रश्न
Bakelite is the polymer of:
(a) Benzaldchyde and phenol
(b) Acetaldehyde and phenol
(c) Formaldehyde and phenol
(d) Formaldehyde and benzyl alcohol
Draw the structures of veronal and thymine.
Answer the following in one sentence.
Identify 'A' in the following reaction:
Answer the following in one sentence.
Define the term: Vulcanization
Answer the following.
Write the reaction of the formation of Nylon 6.
Answer the following.
Write the reaction of the formation of Terylene.
Answer the following.
Write name and formula of raw material from which bakelite is made.
Identify condensation polymers and addition polymers from the following.
Attempt the following:
Write the chemical reactions involved in the manufacture of Nylon 6,6.
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.
Answer the following.
Is synthetic rubber better than natural rubber? If so, in what respect?
Write the name of the catalyst used for preparation of high density polythene polymer.
Write a chemical reaction for the preparation of the following polymer.
polyacrylonitrile
Write preparation of low density polythene.
Mention two uses of LDP.
Write two uses and two properties of polythene.
Which among the following polymers is obtained from styrene and 1-3-butadiene?
Which of the following polymer is used in paints?
Identify the CORRECT statement regarding the following polymer.
\[\begin{array}{cc}
\phantom{....}\ce{O}\phantom{............}\ce{O}\phantom{...................}\ce{H}\phantom{.....}\\
\phantom{....}||\phantom{.............}||\phantom{...................}|\phantom{......}\\
\ce{-[C - (CH2)4 - C - NH - (CH2)6 - N -]_{{n}}}
\end{array}\]
Select the CORRECT match for both the polymers.
\[\ce{{n} CH2 = CH2 ->[333 K - 343 K][6 - 7 atm, catalyst] X}\]
Which of the following is CORRECT about polymer 'X'?
Which among the following polymers can NOT be remoulded?
Which of the following compounds is used to prepare orlon?
Which among the following catalysts is used in the preparation of dacron?
Identify the monomers used in the preparation of Novolac.
Which of the following polymers is prepared by using phenol?
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 among the following polymers is used to manufacture chemical containers?
Which of the following polymers is used as insulation for cables?
Which of the following is not a semisynthetic polymer?
Match the polymers given in Column I with their repeating units given in Column II.
| Column I | Column II |
| (i) Acrilan |
(a) \[\begin{array}{cc} |
| (ii) Polystyrene | (b) \[\begin{array}{cc} \ce{Cl}\phantom{.......}\\ |\phantom{........}\\ \phantom{}\ce{-(CH2 - C = CH - CH2)\underset{n}{-}} \end{array}\] |
| (iii) Neoprene | (c) \[\begin{array}{cc} \phantom{................................}\ce{CN}\\ \phantom{..............................}|\\ \ce{-(CH2 - CH = CH - CH2 - CH2 - CH)\underset{n}{-}} \end{array}\] |
| (iv) Novolac | (d) \[\begin{array}{cc} \ce{-(CH2 - CH)\underset{n}{-}}\\ \phantom{.....}|\\ \phantom{.......}\ce{CN} \end{array}\] |
| (v) Buna—N | (e)  |
| (f) \[\begin{array}{cc} \ce{-(CH2 - CH)\underset{n}{-}}\\ \phantom{.....}|\\ \phantom{......}\ce{Cl} \end{array}\] |
Which of the following is not a copolymer?
The monomer of Teflon is ______.
Trans - form of poly isoprene is:-
Which of the following polymers is synthesized using a free radical polymerisation technique?
Nylon threads are made of ______.
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?
Answer the following.
Write the structure of isoprene and the polymer obtained from it.
Answer the following.
Write the structure of isoprene and the polymer obtained from it.
Name and draw the structure of the repeating unit in natural rubber.
Another name of terylene is ______.
The monomer used in preparation of teflon is ______.
Write the structure of isoprene and the polymer obtained from it.
Name and draw the 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.
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.
