Tag: polymers

Quizzes (12) Questions (105)

Questions Related to polymers

Multiple choice allotropes of carbon chemistry occurrence of carbon compounds in nature polymers

Process of conversion of wood into coal by biochemical process, taking over millions of years is called:

  1. catenation

  2. carbonation

  3. pyrolysis

  4. destructive distillation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Process of conversion of wood into coal by biochemical process is known as Carbonization. Coal burns cleaner than wood burning coal was easier because coal burned longer than wood.

Carbonization is the term for the conversion of an organic substance into carbon or a carbon-containing residue through pyrolysis or destructive distillation. It is often used in organic chemistry with reference to the generation of coal gas and coal tar from raw coal.

Multiple choice allotropes of carbon chemistry occurrence of carbon compounds in nature polymers

When super heated steam is passed through white hot wood charcoal, it gets reduced to a mixture of $X, Y$ and this reaction is named as $Z$. Identify $Y$.

  1. $C{O} _{2}$
  2. $S{O} _{2}$
  3. ${H} _{2}$
  4. $N{O} _{2}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
$X + Y \longrightarrow CO + H _2(water-gas)$
$X = CO$
$Y = H _2$
$XY = water- gas (CO + H _2)$ reaction is exothermic.

$Z$ is known as $carbonisation$ reaction.
Hence, the correct option is C.

Multiple choice allotropes of carbon chemistry occurrence of carbon compounds in nature polymers

When super heated steam is passed through red hot wood charcoal, it gets reduced to a mixture of $X$ and $Y$ and this mixture is named as $Z$. Identify the mixture $Z$.

  1. Producer gas

  2. Water gas

  3. Coal gas

  4. Soda water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When super heated steam is passed through hot wood charcoal then reaction takes place as


$C + H _2O \rightarrow CO + H _2$

The combination of $CO$ and $H _2$ is known as water gas.

Multiple choice allotropes of carbon chemistry occurrence of carbon compounds in nature polymers

${ C } _{ 12 }{ H } _{ 22 }{ O } _{ 11 }\xrightarrow { \quad \quad Conc.{ H } _{ 2 }S{ O } _{ 4 }\quad \quad  } 12C+11{ H } _{ 2 }O$
Which of the following is obtained by the above reaction?

  1. Animal charcoal

  2. Sugar charcoal

  3. Coke

  4. Wood charcoal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sugar when treated with con. $H _2SO _4$ it gives carbon as sugar charcoal and water.

${ C } _{ 12 }{ H } _{ 22 }{ O } _{ 11 }\xrightarrow { \quad \quad Conc.{ H } _{ 2 }S{ O } _{ 4 }\quad \quad  } 12C+11{ H } _{ 2 }O$

Multiple choice copolymerisation types of polymerisation reactions polymer polymers chemistry

Teflon and Neoprene are the example of:

  1. copolymer

  2. monopolymer

  3. homopolymer

  4. condensation polymer.
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

Teflon is homopolymer of monomeric units of tetra-fluoro-ethene

$CF _2=CF _2$
Neoprene is homopolymer of monomeric units of chloroprene [ $2-chloro-1,3-butadiene$].
so these are homopolymer and monomers, correct option is [B,C].

Multiple choice copolymerisation types of polymerisation reactions polymer polymers chemistry

Which of the following sets contain only addition homopolymers?

  1. Polythene, Natural rubber, Cellulose

  2. Nylon, Polyester, Melamine resin

  3. Teflon, Bakelite, Orlon

  4. Neoprene, PVC, Polythene
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

On the basis of mode of polymerization, polymers can be classified into two types:-

[1] Addition polymer
[2] Condensation polymer
Addition polymers are formed by the repeated addition of monomer molecules possessing double or triple bonds. However, the addition polymers formed by the polymerization of a single monomeric species are known as homopolymers.
Example= Polythene: Made from the polymerization of ethene
Natural rubber: Made from the polymerization of cis-1,4-polyisoprene
Cellulose: Made from the polymerization of $\beta$ D- glucose
Neoprene: Made from the polymerization of chloroprene
PVC: Made from the polymerization of vinyl chloride

Multiple choice copolymerisation types of polymerisation reactions polymer polymers chemistry

On complete hydrogenation, natural rubber produces:

  1. ethylene-propylene copolymer

  2. vulcanized rubber

  3. polypropylene

  4. polybutylene
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Natural rubber forms due to polymerisation of isoprene and on hydrogenation provide a polymer of the ethylene-propylene copolymer.


Hence, option A is correct.

Multiple choice copolymerisation types of polymerisation reactions polymer polymers chemistry

Polymerisation in which two or more chemically different monomers take part is called 

  1. addition polymerisation

  2. copolymerisation

  3. chain polymerisation

  4. homopolymerisation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Addition polymerisation - In this type of polymerisation, the molecules of the same monomer or different monomers add together on a large scale to form a polymer.
Copolymerisation - Copolymerisation is a polymerisation reaction in which a mixture of more than one monomeric species is allowed to polymerise to form a copolymer.
Chain polymerisation - Chain polymerisation or chain growth polymerisation is a polymerisation technique, where unsaturated monomer molecules add on to the active site on a growing polymerisation one at a time.
Homopolymerisation - Homopolymerisation is the polymerisation of a single type of monomer to form a homopolymer.

Multiple choice copolymerisation types of polymerisation reactions polymer polymers chemistry

Buna-S is a copolymer of:

  1. styrene and $1,\:3$ - butadiene

  2. styrene and ethylene
  3. $1,\:3$ - butadiene and ethylene
  4. $1,\: 3$ - butadiene and acrylonitrile
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Buna-S is formed from styrene and $1,:3$ - butadiene.
The reaction is shown below:
$nCH _2=CH-CH=CH _2 + nC _6H _5CH=CH _2 \rightarrow -(CH _2-CH=CH-CH _2-CH _2-CH(C _6H _5)) _n-$