LDPE

Q.

Which of the following statement is not true about low density polyethene?

(a) Tough

(b) Hard

(c) Poor conductor of electricity

(d) Highly branched structure

Q.

Which of the following is a branched polymer?

1. Nylon

2. High density polymer

3. Low density polymer

4. Polyester

Q.

What is a monomer in plastic?

Q.

Match the polymers given in Column I with their main applications given in Coloumn II.

$\begin{array}{ccc}ColumnI& & ColumnII\\ A.Bakelite& 1.& Unbreakablecrockery\\ B.Lowdensitypolyethene& 2.& Non-stickcookwares\\ C.Melamine-formaldehyderesin& 3.& Packagingmaterialforshockabsorbance\\ D.Nylon-6& 4.& Electricalswitches\\ E.Polytetrafluoroethane& 5.& Squeezebottles\\ F.Polystyrene& 6.& Tyre,cords\end{array}$

Q. In the manufacture of polythene by the Ziegler process using ethene, the temperature for proper polymerisation required is

1. 
2. 
3. 
4. 

Q. Out of these which is/are property(ies) of LDPE?

1. Chemically inert
2. Tough not flexible
3. Poor conductor of electricity
4. All the above

Q. 51.Among nylon , cellulose, PVC, natural rubber the polymer in which the intermolecular force of attraction is the weakest is A.nylon. B.cellolose C.natural rubber D.PVC

Q.

Match the polymers given in Column I with their chemical names given in Column II.

$\begin{array}{cccc}& ColumnI& & ColumnII\\ A.& Nylon-6& 1.& Polyvinylchloride\\ B.& PVC& 2.& Polyacrylonitrile\\ C.& Acrilan& 3.& Polycaprolactum\\ D.& Naturalrubber& 4.& Lowdensitypolythene\\ E.& LDP& 5.& cis-polyisoprene\end{array}$

Q. Arrange the following polymers in increasing order of their intermolecular force.
(i) Nylon $6$, $6$ Buns-S polythene
(ii) Nylon $6$, Neoprene, Polyvinyl chloride.

Q. What does LDPE stand for?

1. Low density poly enolate
2. Low duration polyethene
3. Low density polyethene
4. Long diameter polyethene

Q. When 280 gm of ethylene polymerises to polyethene according to the equation.

1. $\frac{280}{n}$, n
2. 280, 10n
3. 280, $\frac{10}{n}$
4. $\frac{280}{n}$, 280

Q. Polystyrene is an example of ___.

1. elastomer
2. fibre
3. cation polymerisation polymer
4. thermosetting polymer

Q. Which of the following statements is not true about low density polythene?

1. They are tough
2. They are hard
3. Highly branched structure
4. Poor conductor of electricity

Q. Given the polymers
$A=$ Nylon 6, 6; $B=$ Buna-S; $C=$ Polythene.

1. $A>B>C$
2. $B>C>A$
3. $B<C<A$
4. $C<A<B$

Q. The full form of PVC is:

1. pure vulcanised chlorine
2. polyvulcanised chloride
3. polyvinyl chloride
4. none of the above

Q. $100$ g of ethylene polymerizes to polyethylene according to the equation,

1. $\frac{n}{2}$ g
2. $100$ mg
3. $100$ g
4. $\frac{100}{n}$ g

Q.

Which of the following is a branched polymer?

1. Low density polymers like LDPE

2. Polyester

3. High density polymer

4. Nylon

Q. Favourable conditions for preparation of low density polythene (LDP) is:

1. low $P$, high $T$
2. high $P$, high $T$
3. low $P$, low $T$
4. high $P$, low $T$

Q. A. Natural rubber is an elastomer.
R. The inter-molecular forces of attraction between the polymer chains are weak vander Waals forces.

1. Both A and R are correct and R is the correct explanation of the A
2. Both A and R are correct but R is not the correct explanation of the A
3. A is correct but R is in correct
4. A is incorrect but R is correct

Q. Select the statements applicable to LDPE.

1. It has high degree of branching
2. It has low density
3. It is made using the free-radical mechanism
4. It is used to make plastic bags.

Q. Which of the following is not a biodegradable polymer?

1. Glyptal
2. Polyhydroxy butyrate $-CO-\beta$ hydroxyl valerate
3. PHBV
4. Nylon -$2$-$\beta$ hydroxyl

Q. 17 A polymer contains 4% of sulphur it find out the minimum molar mass of the polymer

Q. Match the column.
List - I List - II
A) Rayon 1) Cationic Polymerisation
B) Glass 2) Organic Polymers
C) Polystyrene 3) Inorganic polymers
D) Polyisoprene 4) Anionic polymerisation

1. $A-2,B-3,C-4,D-1$
2. $A-2,B-1,C-3,D-4$
3. $A-3,B-2,C-4,D-1$
4. $A-2,B-3,C-1,D-4$

Q. 'Koroseal' is a long, chain polymer. When mixed with plasticizers, it forms an excellent plastic. Which one of the following is not the use of it?

1. For water-proofing
2. Lining material for tanks
3. In wire and cable insulation
4. For sun-shading

Q.

10) Plastics are polymers

1. True
2. False

Q. Low-density polyethene (LDP) is used in the insulation of electricity carrying wires and manufacture of flexible pipes and squeeze bottles because:

1. it is tough, hard and rigid
2. it is chemically inert, tough, flexible and poor conductor of electricity
3. it is very tough, good conductor of electricity and flexible
4. it is chemically inert, very soft, water absorbent and poor conductor of heat

Q. $F_{2}C=C{F}_2$ is monomer of the polymer:

1. Teflon
2. Polyethene
3. Bakelite
4. Terylene

Q. Among cellulose, polyvinyl chloride, nylon and natural rubber, the polymer in which the following intermolecular force of attraction is weakest?

1. polyvinyl chloride
2. natural rubber
3. nylon
4. cellulose

Q. What are broad-spectrum antibiotics ?
How are polythene and neoprene prepared ?

Q. Which of these is a monomer of poly acrylonitrile?

1. ${CH}_2=CH-CHO$
2. ${CH}_{2}O$
3. None of these
4. ${CH}_3{CH}_2-N=O$