English

Write chemical reactions for the preparation of high-density polythene. - Chemistry

Advertisements
Advertisements

Question

Write chemical reactions for the preparation of high-density polythene.

Short/Brief Note
Advertisements

Solution

Chemical reaction for the preparation of high-density polythene (HDP) is as follows:

shaalaa.com
  Is there an error in this question or solution?
Chapter 15: Introduction to Polymer Chemistry - Short Answer Questions (Type-II)

APPEARS IN

SCERT Maharashtra Chemistry [English] 12 Standard HSC
Chapter 15 Introduction to Polymer Chemistry
Short Answer Questions (Type-II) | Q 3.1

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

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 formulae of the raw materials used for preparation of Dextran.


Write the structure of melamine.


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.

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

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.


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?


Answer the following.

Write main specialities of Buna-S, Neoprene rubber?


Monomer used for preparation of polyacrylonitrile is _____________


Monomer of natural rubber is __________


write the structure of the monomer used in natural rubber.


Write the name and formulae of the monomers used for the preparation of dacron.


Write two uses and two properties of polythene.


Explain vulcanization of rubber.


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?


The INCORRECT match for the polymer with its application is:


\[\ce{{n} CH2 = CH2 ->[333 K - 343 K][6 - 7 atm, catalyst] X}\]

Which of the following is CORRECT about polymer 'X'?


Identify the polymer obtained by polymerization of n moles of acrylonitrile.


Which among the following polymers is obtained from CH2 = CH – CN by polymerisation?


Which among the following catalysts is used in the preparation of dacron?


Which among the following monomers is used to prepare Teflon?


Which of the following polymers is prepared by using phenol?


Which of the following monomers is used in the manufacture of Neoprene rubber?


Which among the following polymers is an example of addition polymer?


Identify addition polymer from the following.


Which among the following is an example of addition 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  

Match the polymers given in Column I with their repeating units given in Column II.

Column I Column II
(i) Acrilan

(a) \[\begin{array}{cc}
\ce{-(CH2 - CH)\underset{n}{-}}\\
\phantom{....}|\\
\phantom{.......}\ce{C6H5}
\end{array}\]

(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)  \[\begin{array}{cc}
\ce{-(CH2 - CH)\underset{n}{-}}\\
\phantom{.....}|\\
\phantom{......}\ce{Cl}
\end{array}\]

The monomer of Teflon is ______.


Nylon threads are made of ______.


The catalyst used for the polymerisation of olefins is ______.


The monomer of natural rubber is ______.


Answer the following.

Name and draw structure of the repeating unit in natural rubber.


Write the structure of isoprene and the polymer obtained from it.


Write the name of the 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.


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.


Write the structure of isoprene and the polymer obtained from it.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×