Polymers
In the following reaction sequence, major products $\mathbf{X}$ and $\mathbf{Y}$ are acyclic monomers.
500 mol of $\mathbf{X}$ completely reacts with 500 mol of $\mathbf{Y}$ to give 1 mol of a single biodegradable acyclic copolymer $\mathbf{Z}$ as the only product. The amount of $\mathbf{Z}$ formed in grams is $\_\_\_\_$ .
Given :
Atomic mass (in amu): $\mathrm{H}: 1, \mathrm{C}: 12, \mathrm{~N}: 14, \mathrm{O}: 16, \mathrm{Br}: 80$
Explanation:
Calculation of water molecules lost
Each monomer of $X$ and $Y$ combines by losing $2$ moles of water per linkage. When $500$ moles of each react, total possible water molecules lost will be:
$ 500 \times 2 - 1 = 999 $
Mass of water lost
Mass of water lost = (number of moles of water) × (molar mass of water)
$ = 999 \times 18 = 17982 \text{ g} $
Mass of polymer formed
Total mass of reactants = (mass of 500 mol of X) + (mass of 500 mol of Y)
$ = 75 \times 500 + 131 \times 500 = 37500 + 65500 = 103000 \text{ g} $
Therefore, mass of polymer formed, $Z$, after losing water is:
$ 103000 - 17982 = 85018 \text{ g} $
Hence, the mass of polymer $Z$ formed is 85,018 g.
The monomer (X) involved in the synthesis of Nylon 6,6 gives positive carbylamine test. If 10 moles of X are analyzed using Dumas method, the amount (in grams) of nitrogen gas evolved is ______.
Use: Atomic mass of N (in amu) = 14
Explanation:
Positive carbylamine test is given by primary amine compounds. Hexamethylene diamine is a primary amine compound and can give positive carbylamine test.
So, the monomer $X$ is hoxamethylene diamine.
$
\begin{aligned}
&\begin{aligned}
x \rightarrow \mathrm{H_2N}-\left(\mathrm{CH}_2\right)_6-\mathrm{NH}_2 \quad & \text { Molarmars } & \\
= & 6 \times 12 \mathrm{~g} / \mathrm{mol}+2 \times 14 \mathrm{~g} / \mathrm{mol} +16 \times 1 \mathrm{~g} / \mathrm{mol} & \\
= & 116 \mathrm{~g} / \mathrm{mol} &
\end{aligned}\\
&\text { Moles of } X \text { analyzed using Dumas method }=10 \mathrm{~mol}
\end{aligned}
$According to Dumas method, the nitrogen present in the compound is released as nitrogen gas $\left(\mathrm{N}_2\right)$,
The general chemical equation fol Dumas method can be written as$
\mathrm{C}_x \mathrm{H}_y \mathrm{~N}_z+\left(2 x+\frac{y}{2}\right) \mathrm{CuO}(\mathrm{~s}) \xrightarrow{}
$(organic
Compound)$
x \mathrm{CO}_2(g)+\frac{y}{2} H_2 \mathrm{O}(gold )+\frac{z}{2} \mathrm{~N}_2(g)+\left(2 x+\frac{y}{2}\right) \mathrm{Cu}(s)
$The compound used in Dumas method is hexamethylene diamine. Its formula is $\mathrm{C}_6 \mathrm{H}_{16} \mathrm{~N}_2$$
\text { So, the equation can be written as, }
$$
\mathrm{C}_6 \mathrm{H}_{16} \mathrm{~N}_2+20 \mathrm{CuO} \rightarrow
$$
6 \mathrm{CO}_2+8 \mathrm{H}_2 \mathrm{O}+1 \mathrm{~N}_2+20 \mathrm{Cu}
$$
\text { So, } 1 \text { mole of } \mathrm{C}_6 \mathrm{H}_{16} \mathrm{~N}_2 \text { gives. } 1 \text { mole of } \mathrm{N}_2 \text {. }
$Given 10, moles of $\mathrm{C}_{6}\mathrm{H}_{16} \mathrm{~N}_2$ (hexamethylene diamine) gives 10 moles of $\mathrm{N}_2$ gas.Moles of $\mathrm{N}_2$ gas evolved $=10$ mol Mass can be calculated as, \begin{aligned}
&\text { Moles }=\frac{\text { mass }}{\text { molarmass }}\\
&\text { Moloumass of } \mathrm{N}_2=28 \mathrm{~g} / \mathrm{mol}
\end{aligned}mass $=$ moles $\times$ molar mass$
\begin{aligned}
&\begin{aligned}
& =10 \text { mol } x 28 \mathrm{~g} / \mathrm{mol} \\
& =280 \mathrm{~g}
\end{aligned}\\
&\text { Answer: } 280 \%
\end{aligned}
$
$A, C$
$B, E$
$C, D$
$A, A$
Consider the following sequence of reaction
$ 2 \mathrm{CH}_3 \mathrm{Cl}+\mathrm{Si} \xrightarrow[573 \mathrm{~K}]{\mathrm{Cu}} X \xrightarrow{\mathrm{H}_2 \mathrm{O}} Y \xrightarrow{\text { Polymerisation }} Z $
The repeating structural unit in Z is
Polymer $X$ is an example of polyester and $Y$ is an example of polyamide $X$ and $Y$ are respectively
novolac, terylene
dacron, nylon 6,6
nylon 6 , terylene
teflon, terylene
$ \text { Match the following. } $
The correct answer is
A-II, B-IV, C-I, D-III
A-II, B-III, C-IV, D-I
A-III, B-I, C-IV, D-II
A-III, B-II, C-IV, D-I
Neoprene is the polymer of a monomer $X$. IUPAC name of $X$ is
1, 3-butadiene
2-methyl-1, 3-butadiene
2-iodo-1, 3-butadiene
2-chloro-1,3-butadiene
' $X$ ' is a polymer, which is mainly used for making unbreakable cups and laminated sheets. The monomers of ' $X$ ' are
urea and formaldehyde
ethylene glycol and phthalic acid
phenol and formaldehyde
1,3-butadiene and styrene
$ \text { Match the following : } $
$ \begin{array}{llrl} \hline & \text { List-I (Use) } & & \text { List-II (Substance) } \\ \hline \text { A. } & \text { Electrodes in batteries } & \text { I. } & \text { Polypropylene } \\ \hline \text { B. } & \text { Welding of metals } & \text { II. } & \text { Polyacetylene } \\ \hline \text { C. } & \text { Toys } & \text { III. } & \text { Oxyacetylene } \\ \hline \end{array} $
The correct answer is
A-III, B-II, C-I
A-II, B-III, C-I
A-II, B-I, C-III
A-I, B-II, C-III
A polymer sample contains 10 molecules each with molecular mass 5,000 and 5 molecules each with molecular mass 50,000 . The number average molecular mass of the polymer sample is
$2 \times 10^4$
$3 \times 10^4$
$2 \times 10^5$
$3 \times 10^5$
The number of linear and crosslinked polymers in the following respectively are
Novolac, Nylon 6,6, Bakelite, PVC, melamine
1, 4
4,1
2,3
3,2
Which one of the statements, regarding $X$ is not correct?
3-Hydroxybutanoic acid +3 -Hydroxypentanoic acid $\rightarrow X$
It is a condensation polymer
It is non-biodegradable
It is used in orthopaedic devices
It is known as PHBV
Consider the following
Statement I Nylon 6 is a condensation copolymer.
Statement II Nylon 6, 6 is a condensation polymer of adipic acid and tetra-methylene diamine.
The correct answer is
Both statement-I and Statement-II are correct.
Statement-I is correct, but Statement-II is not correct.
Statement-I is not correct, but Statement-II is correct.
Both statement-I and Statement-II are not correct.
What are $X$ and $Y$ in the following reaction?
$ n \mathrm{ClCH}=\mathrm{CH}_2 \xrightarrow{x} Y $
$\mathrm{Na} / \mathrm{NH}_3(\mathrm{I})$ - Thermosetting polymer
$\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{COO}\right)_2$ - Thermoplastic polymer
$\mathrm{Na} / \mathrm{NH}_3(l)$ - Condensation polymer
$\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{COO}\right)_2$ - Network polymer
$ \text { Thermoplastic polymer (Product } Y \text { ). } $Bio compatible
High thermal stability
Low dielectric strength
Water repelling in nature
$ \text { Match the following. } $
Correct answer is
A-III, B-V, C-I, D-II
A-I, B-II, C-IV, D-III
A-II, B-IV, C-I, D-III
A-II, B-IV, C-V, D-I
The correct statement regarding $X$ and $Y$ in the following set of reactions is
$X$ is HDP and $Y$ is LDP.
$X$ is LDP and $Y$ is HDP.
$X$ is used in the preparation of flexible pipes and $Y$ is used in manufacturing squeeze bottles.
$X$ is used in insulation of electricity carrying wires, $Y$ is used in manufacturing of bottles.
Novolac is formed by the polymerisation of monomer ' $x$ ' in the presence of $\mathrm{OH}^{-}$ions. What is ' $x$ '?
Which of the following is the common monomer for the polymers bakelite and melamine?
$\mathrm{HO}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{OH}$
$\mathrm{CH}_3-\mathrm{OH}$
In which polymer preparation, Ziegler- Natta catalyst is used?
Low density polythene
Telfon
Polyacrylonitrile
High density polythene
What are ' $X$ ' and ' $Y$ ' respectively in the following reactions ?
$\mathbf{Assertion (A)}$ Silicones are used for water proofing of fabrics.
$\mathbf{Reason (R)}$ The repeating unit in silicones is
The correct answer is
Identify the structure of the polymer 'P' formed in the given reaction
Caprolactam $\xrightarrow[\mathrm{H}_2 \mathrm{O}]{533-543 \mathrm{~K}} P$
Match the following.
| List-I (Monomer/s) | List-II (Name of polymer) |
| A. CF₂$=$CF₂ | I. Neoprene |
| B. NH₂(CH₂)₆NH₂, HO₂C(CH₂)₄CO₂H | II. Bakelite |
| C. C₆H₅OH₃ HCHO | III. Teflon |
| D. CH₂$=$CH(Cl)—CH$=$CH₂ | IV. Nylon 6,6 |
The correct answer is
$ \text { Match the following. } $
| List-I (Polymers) |
List-II (Type) |
||
|---|---|---|---|
| A. | Buna- N -rubber | I | Fibre |
| B | Terylene | II | Thermosetting polymer |
| C | Polystyrene | III | Elastomer |
| D | Urea-formaldehyde resin | IV | Thermosplastic polymer |
$ \text { The common monomer for both terylene and glyptal is } $
$ \text { Which of the following is an example for fibre? } $
| List I - (Monomer) | List II - (Polymer) |
|---|---|
| (A) Tetrafluoroethene | (I) Orlon |
| (B) Acrylonitrile | (II) Natural rubber |
| (C) Caprolactam | (III) Teflon |
| (D) Isoprene | (IV) Nylon-6 |
Choose the correct answer from the options given below :
Match List I with List II
| LIST I | LIST II | ||
|---|---|---|---|
| A. | Weak intermolecular forces of attraction | I. | Hexamethylenediamine + adipic acid |
| B. | Hydrogen bonding | II. | $\mathrm{AlEt_3+TiCl_4}$ |
| C. | Heavily branched polymer | III. | 2 - chloro - 1, 3 - butadiene |
| D. | High density polymer | IV. | Phenol + formaldehyde |
Choose the correct answer from the options given below:
Match the following
| Column A | Column B | ||
|---|---|---|---|
| (a) | Nylon 6 | (I) | Natural Rubber |
| (b) | Vulcanized Rubber | (II) | Cross Linked |
| (c) | cis-1, 4-polyisoprene | (III) | Caprolactam |
| (d) | Polychloroprene | (IV) | Neoprene |
Choose the correct answer from options given below:
Match List I with List II
| LIST I (Examples) |
LIST II (Type) |
||
|---|---|---|---|
| A. | 2-chloro-1,3- butadiene | I. | Biodegradable polymer |
| B. | Nylon 2-nylon 6 | II. | Synthetic Rubber |
| C. | Polyacrylonitrile | III. | Polyester |
| D. | Dacron | IV. | Addition Polymer |
Choose the correct answer from the options given below:
Given below are two statements :
Statement I : Ethene at 333 to $343 \mathrm{~K}$ and $6$-$7$ atm pressure in the presence of $\mathrm{AlEt}_{3}$ and $\mathrm{TiCl}_{4}$ undergoes addition polymerization to give LDP.
Statement II : Caprolactam at $533$-$543 \mathrm{~K}$ in $\mathrm{H}_{2} \mathrm{O}$ through step growth polymerizes to give Nylon 6.
In the light of the above statements, choose the correct answer from the options given below:
The polymer $\mathrm{X}$ - consists of linear molecules and is closely packed. It is prepared in the presence of triethylaluminium and titanium tetrachloride under low pressure. The polymer $\mathrm{X}$ is-
Buna-S can be represented as:
Match List I with List II
| List I Polymer |
List II Type/Class |
||
|---|---|---|---|
| (A) | Nylon-2-Nylon-6 | (I) | Thermosetting polymer |
| (B) | Buna-N | (II) | Biodegradable polymer |
| (C) | Urea-formaldehyde resin | (III) | Synthetic rubber |
| (D) | Dacron | (IV) | Polyester |
Choose the correct answer from the options given below:
Polymer used in orlon is :
Caprolactam when heated at high temperature in presence of water, gives
Match List I with List II
| List I | List II | ||
|---|---|---|---|
| A. | Elastomeric polymer | I. | Urea formaldehyde resin |
| B. | Fibre Polymer | II. | Polystyrene |
| C. | Thermosetting Polymer | III. | Polyester |
| D. | Thermoplastic Polymer | IV. | Neoprene |
Choose the correct answer from the options given below :
Match List I with List II
| List I (Name of polymer) | List II (Uses) | ||
|---|---|---|---|
| A. | Glyptal | I. | Flexible pipes |
| B. | Neoprene | II. | Synthetic wool |
| C. | Acrilan | III. | Paints and Lacquers |
| D. | LDP | IV. | Gaskets |
Choose the correct answer from the options given below :
$ \text { Match the following. } $
$ \begin{array}{llll} \hline & \text { List-I (Polymer type) } & & \text { List-II (Example) } \\ \hline \text { A. } & \text { Fibre } & \text { I. } & \text { Bakelite } \\ \hline \text { B. } & \text { Elastomer } & \text { II. } & \text { Polystyrene } \\ \hline \text { C. } & \text { Thermosetting polymer } & \text { III. } & \text { Neoprene } \\ \hline \text { D. } & \text { Thermosplastic polymer } & \text { IV. } & \text { Dacron } \\ \hline \end{array} $
The correct answer is
A-III, B-IV, C-I, D-II
A-IV, B-III, C-I, D-II
A-II, B-I, C-IV, D-III
A-IV, B-I, C-II, D-III
Ziegler-Natta catalyst is used in the manufacture of
polyacrylonitrile
terylene
high density polythene
Iow density polythene
$R$ is one of the monomers for the formation of a polymer called
dacron
nylon 6, 6
nylon 6
bakelite
