Advertisements
Advertisements
प्रश्न
Write two uses and two properties of polythene.
Advertisements
उत्तर
Uses of high-density polyethylene:
- HDP is used in the manufacture of toys and other household articles like buckets, dustbins, bottles, pipes, etc.
- It is used to prepare laboratory wares and other objects where high tensile strength and stiffness is required.
Properties of high-density polyethylene:
- HDP is crystalline, melting point in the range of 144 - 150 °C.
- It is much stiffer than LDP and has high tensile strength and hardness.
- It is more resistant to chemicals than LDP.
APPEARS IN
संबंधित प्रश्न
Bakelite is the polymer of:
(a) Benzaldchyde and phenol
(b) Acetaldehyde and phenol
(c) Formaldehyde and phenol
(d) Formaldehyde and benzyl alcohol
Based on molecular forces, what type of polymer is neoprene?
The Zieglar-Natta catalyst is used in the preparation of _______.
(A) LDPE
(B) PHBV
(C) PAN
(D) HDPE
Write the structures of the monomers used for getting the following polymers
Melamine – formaldehyde polymer
Draw the structures of veronal and thymine.
Write the monomers of the following polymer :
Choose the correct option from the given alternatives.
Which of the following is made up of polyamides?
Answer the following in one sentence.
Identify 'A' in the following reaction:
Answer the following in one sentence.
Identify thermoplastic and thermosetting plastic from the following:
- PET
- Urea formaldehyde resin
- Polythene
- Phenol formaldehyde resin
Answer the following.
Write the reaction of the formation of Terylene.
Draw the structures of polymers formed from the following monomers
\[\ce{n HOOC–R–COOH + n HO–R'–OH}\]
Answer the following.
Draw the structures of polymers formed from the following monomers
H2N–(CH2)5 – COOH
Identify condensation polymers and addition polymers from the following.
-(CO(CH2)4 - CONH(CH2)6NH-)n
Answer the following.
Write main specialities of Buna-S, Neoprene rubber?
Write a chemical reaction for the preparation of the following polymer.
polyacrylonitrile
write the structure of the monomer used in natural rubber.
Mention two uses of LDP.
Write chemical reaction for preparation of the following.
Buna-S
Write the name of one example of each polymer in which following repeating units.
\[\begin{array}{cc}
\ce{(-CF2-CF2-), -[NH-(CH2)5-CO] -, -(CH2-CH-), (-CH2-CH2-)}\\
\phantom{............................}|\\
\phantom{..............................}\ce{CN}
\end{array}\]
Write chemical reactions for the preparation of high-density polythene.
How many isoprene units are present in abscisic acid?
The INCORRECT match for the polymer with its application is:
Select the CORRECT match for both the polymers.
Which of the following polymers is obtained from chloroprene?
Which among the following polymers can NOT be remoulded?
Which of the following catalysts is used in preparation of terylene?
Which of the following compounds is used to prepare orlon?
Identify the monomers used in the preparation of Novolac.
Which among the following polymers is used to manufacture chemical containers?
Which of the following is not a semisynthetic polymer?
Which of the following polymers, need atleast one diene monomer for their preparation?
(i) Dacron
(ii) Buna-S
(iii) Neoprene
(iv) Novolac
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 is not a copolymer?
F2C = CF2 is monomer of the polymer -
Which of the following polymer has ester linkage?
Which of the following is an example of polyester?
Polymer used in bullet proof glass is ______.
Identify the monomer used to prepare neoprene.
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.
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.
Write the structure of isoprene and the polymer obtained from it.
Name the compound which reacts with formaldehyde to produce ethyl alcohol.
Write the preparation of viscose rayon.
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.
Name and draw structure of the repeating unit in natural rubber.
Name and draw structure of the repeating unit in natural rubber.
