MCQ Questions for Class 12 Engineering Chemistry Polymers Quiz 6

Super glue or crazy glue is:

0%
polymethyl methacrylate
0%
polyethyl acrylate
0%
polymethyl $\alpha$ -cyanoacrylate
0%
polyethyl methacrylate

Explanation

Super glue is poly(methyl

$\alpha$ -cyanoacrylate).

Polypropylene can be obtained by polymerisation of :

0%
$CH_2=CH-CH_3$
0%
$CH_2=CH_2$
0%
$CH_4$
0%
$CH_3-CH_3$

Explanation

$nCH_3-HC=CH_2\longrightarrow \underset{\text{porypropylene}}{(-CH_2-\underset{CH_3}{\underset{|}{C}H}-)_n}$

Hence, polypropylene must have its monomeric unit derived from propylene (3 carbon unit).

Hence the correct option is A.

The monomer for the given compound is:

0%
2-methylpropene
0%
Styrene
0%
Propylene
0%
Ethene

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

0%
Tough
0%
Highly branched structure
0%
Poor conductor of electricity
0%
Hard

In elastomer, intermolecular forces are:

0%
Nil
0%
Weak
0%
Strong
0%
Very strong

Explanation

Rubber-like solids with elastic properties are called elastomers.

Polymer chains are held together in these materials by relatively weak inter-molecular bonds i.e. weak Van-der Waals interaction, which permit the polymers to stretch in response to macroscopic stresses.

Hence, option

$B$ is correct.

Which type of polymer is natural rubber?

0%
Condensation polymer
0%
Addition polymer
0%
Coordination polymer
0%
None of the above

Perlon is:

0%
terelene
0%
nylon-6
0%
rubber
0%
polyester

Explanation

Another name of Perlon is Nylon

$-6$ .

Monomer is

$\longrightarrow$ Caprolactam.

1174823_698815_ans_3907ae48026848fc80cebbc8a219a9d1.PNG

Neoprene is a polymer of:

0%
isoprene
0%
butadiene
0%
styrene
0%
chloroprene

Structure of (monomer unit of) natural rubber is

0%
0%
0%
0%
$(-CH_2-CH_2-)_n$

Which of the following is not a biopolymer?

0%
Starch
0%
Rubber
0%
Proteins
0%
Nucleic acids

A polyamide synthetic polymer prepared by prolonged heating of caprolactum, is:

0%
nylon-6, 6
0%
nylon-6
0%
nylon-6, 10
0%
glyptal

Which of the following is used to make non-stick cook-wares?

0%
Polyvinyl chloride
0%
Polytetra fluoro ethylene
0%
Polystyrene
0%
Polyethylene terephthalate

Dacron is an example of:

0%
polyamide
0%
polypropylene
0%
polyurethane
0%
polyester

Buna-S is a polymer of:

0%
butadiene only
0%
butadiene and nitrile
0%
styrene only
0%
butadiene and styrene

$[-NH(CH_2)_6NHCO(CH_2)_4CO-]_n$ is a:

0%
thermosetting polymer
0%
homopolymer
0%
copolymer
0%
addition polymer

Which of the following is a biodergradable polymer?

0%
Polythene
0%
PVC
0%
Bakelite
0%
PHBV

Which one of the following statements is not true?

0%
Buna-S is a co-polymer of butadiene and styrene
0%
Natural rubber is a 1, 4-polymer of isoprene
0%
In vulcanization, the formation of sulphur bridges between different chains make rubber harder and stronger
0%
Natural rubber has the trans-configuration at every double bond

Buna-N synthetic rubber is a co-polymer of

0%
0%
$H_2C=CH-CH=CH_2$ and $H_5C_6-CH=CH_2$
0%
$H_2C=CH-CN$ and $H_5C=CH-CH=CH_2$
0%

The polymer of natural rubber is

0%
all trans isoprene
0%
Buna-N
0%
all cis isoprene
0%
none of these

The raw material used in nylon-6 is:

0%
adipic acid
0%
phthalic acid
0%
ethylene glycol
0%
caprolactum

Mark out the most unlike form of polymerization of

$H_2C=CH-CH=CH_2$

Which is not a polymer?

0%
Sucrose
0%
Enzyme
0%
Starch
0%
Teflon

Condensation product of caprolactum is:

0%
nylon-6
0%
nylon-6,6
0%
nylon-60
0%
nylon-6,10

Identify

$X$ in the reaction.

$CHCl_3 \xrightarrow[HF]{SbF_3} CHF_2Cl \overset{1070\, K}{\rightarrow} (X)+2HCl$

0%
$F_2C=CF_2$
0%
$ClFC=CFCl$
0%
$F_2C=CFCl$
0%
$F_2C=CCl_2$

Explanation

When chloroform is treated with antimony trifluoride and

$HF$ , 2 chlorine atoms are replaced with 2

$F$ atoms.

When

$\displaystyle CHF_2Cl$ is heated to 1070 K, terafluoroethylene (compound X) is obtained.

$\displaystyle 2CHF_2Cl \xrightarrow {1070K} F_2C=CF_2$

The characteristics of condensation polymerization are given below:
I. only C-C linkages present in the polymer structure
II. use of bifunctional or polyfunctional monomers
III. elimination of a small byproduct molecule
Which of the following is true?

0%
I, II, III
0%
Only III
0%
I and II
0%
II and III

Explanation

Besides

$C-C$ linkages, polymer structure also contains atoms as

$O, N, etc.$ , at regular intervals in the main chain. Example: nylon, terylene and polyester etc. whereas elimination occur in condensation polymerisation and in addition polymerisation monomers are polyfunctional.

Dacron (a polymer) is obtained by the condensation polymerization of:

0%
Phenol and formaldehyde
0%
Phenol and phthalic acid
0%
Terepthalic acid and formaldehyde
0%
Dimethyl terephthalate and ethylene glycol

Which of the following statements is not true?

0%
Step growth polymerisation requires a bifunctional monomer.
0%
Nylon 6 is an example of step-growth polymerisation
0%
Chain growth polymerisation includes both homopolymerisation and copolymerisation.
0%
Chain growth polymerisation involves homopolymerisation only.

Which step is the chain propagation step in the above mechanism?

0%
$1$
0%
$2$
0%
$3$
0%
$4$

Which of the following is an example of condensation polymer?

0%
Teflon
0%
Melamine
0%
Nylon-6
0%
BUNA-S

Which of the following has cross-linked polymer?

0%
Vulcanised rubber
0%
Nylon
0%
Phenol-formaldehyde resins
0%
Both $A$ and $C$

The structure of the polymer obtained by the following reaction is:

The solution containing 4.0 % PVC in one litre of dioxane was found to have osmotic pressure of

$6.0 \times 10^{-4}$ atm at 300 K. The molecular mass of polymer is

0%
$6.4 \times 10^2$
0%
$3.0 \times 10^2$
0%
$1.6 \times 10^5$
0%
$5.6 \times 10^4$

Polymer with highest softening point is

0%
LDPE
0%
HDPE
0%
teflon
0%
bakelite

Polymer formation from monomers starts by:

0%
Condensation reaction between monomers
0%
Coordination reaction between monomers
0%
Conversion of one monomer into other monomer
0%
Hydrolysis of monomers

Natural rubber is a polymer of isoprene (2-methyl buta-1,3-diene). If natural rubber is treated with

$O_3$ followed by

$Zn/H_2O$ , the final product will be:

0%
0%
$CH_{ 3 }-\overset { \begin{matrix} O \\ || \end{matrix} }{ C } -CH_2-CH_2-CHO$
0%
$CH_{ 3 }-CH_2-\overset { \begin{matrix} O \\ || \end{matrix} }{ C } -CH_2-CHO$
0%

Which of the following polymers shows a sharp melting point?

0%
Butyl rubber
0%
Polystyrene
0%
Bakelite
0%
Nylon-6,6

Which of the following is an example of elastomers?

0%
Rubber
0%
Nylon-6,6
0%
PVC
0%
Bakelite

Natural rubber is a polymer of

0%
Co-cis-trans isoprene
0%
trans-isoprene
0%
cis-isoprene
0%
none of these

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

0%
high $P$ , low $T$
0%
low $P$ , high $T$
0%
high $P$ , high $T$
0%
low $P$ , low $T$

Caprolactum is the monomer for

0%
Nylon - $6$
0%
Nylon $6,6$
0%
Nylon- $2$ - Nylon- $6$
0%
Terylene

Which of the following polymer is condensation as well as cross-linked polymer?

0%
Bakelite
0%
Nylon-6.6
0%
Nylon-2,,Nylon-6
0%
Dacron

Which polymer is used in the preparation of hose-pipe?

0%
Orlon
0%
Polystyrene
0%
Teflon
0%
Altame

A polymer used in paints is:

0%
nomex
0%
thiokol
0%
saran
0%
glyptal

Rubber is very soft. Therefore, it is vulcanized and used in tires. Vulcanised rubber resists:

0%
drops of acid rain
0%
cold temperatures
0%
jerking movement
0%
wear and tear due to friction

Which of the following polymer is used in pigment?

0%
Buna- S
0%
Neoprene
0%
Teflon
0%
Orlon

Consider the following repeat unit structure:

0%
Poly(amide-imide)
0%
Polyacrylonitrile
0%
Polybutadiene
0%
Polyethylene

Natural fibre is :-

0%
Bakelite
0%
Cellulose
0%
Rubber
0%
Nylon- $6$

Which of the following cannot be grouped as polyolefins?

0%
Polethene
0%
Polypropene
0%
Nylon-6
0%
none

Which one of the following polymer is step-growth polymer?

0%
Polyethylene
0%
Nylon- $6,6$
0%
Buna- $S$ rubber
0%
Orlon

Which of the following is not addition copolymer?

0%
Saran
0%
BUNA -N
0%
SBR
0%
PVC

CBSE Questions for Class 12 Engineering Chemistry Polymers Quiz 6 - MCQExams.com

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Practice Class 12 Engineering Chemistry Quiz Questions and Answers

CBSE Questions for Class 12 Engineering Chemistry Polymers Quiz 6 - MCQExams.com

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Practice Class 12 Engineering Chemistry Quiz Questions and Answers

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