Tag: polymerisation

Questions Related to polymerisation

The compound with which hexamethylene diamine on polymerization gives nylon-6,6 is:

synthetic polyamides polymerisation chemistry

  1. citric acid

  2. adipic acid

  3. oxalic acid

  4. tartaric acid

Show answer
Correct Option: B
Explanation:

Nylon 66 is made of two monomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid, which give nylon 66 its name.


$n HOOC-{(CH _2)} _4-COOH + n H _2N-{(CH _2)} _6-NH _2$ 
$\rightarrow [-OC-{( CH _2)} _4-CO-NH-{(CH _2)} _6-NH-] _n + 2n H _2O$

In which of the following polymer, monomer is not aromatic?

synthetic polyamides polymerisation chemistry

  1. Perlon - L

  2. Polyvinyl pyrrolidone

  3. PTFE

  4. Neoprene

Show answer
Correct Option: A,B,C,D
Explanation:

Porlon-L is a polyamide and a linear non-aromatic structure.

Neoprene is formed by monomer prepared by addition mechanism. PTFE and polyvinyl pyrrolidone also have non-aromatic monomer.

Which factor imparts the crystalline nature to a polymer like nylon?

synthetic polyamides polymerisation chemistry

  1. Strong intermolecular forces like hydrogen bonding between chains.

  2. Van der Waals forces between the polymeric chains.

  3. Close packing of the chains due to ionic bonding between the chains.

  4. Three-dimensional network of chains.

Show answer
Correct Option: A
Explanation:

in nylon, there is strong intermolecular hydrogen bonding between hexamethylene di ammine and di adipic acid,

the nylon is used in making sheets, bristles for brushes and in the textile industry.
so the correct option is [A].

Nylon is a well-known polymer used in fabrics and motor tyres. Nylon$-6,6$ is made from hexamethylenetetramine (having six methyl groups) and :

synthetic polyamides polymerisation chemistry

  1. adipic acid, a six-carbon chain fatty acid

  2. sulphurous acid with six atoms of various elements

  3. sulphure hexafluoride with six fluorine atoms

  4. cobalt hexamine cation with six ammonia ligands

Show answer
Correct Option: A
Explanation:
Nylon is a generic name for a synthetic linear polymer with repeating amide groups $(−NH−CO−)$ which is used in the manufacture of textile fibres. Carothers produced Nylon-66 by the condensation reaction of adipic acid (a dicarboxylic acid with 6 carbon atoms) and hexamethylene-di-amine (a diamine with 6 carbon atoms) give the $[−NH−{(C{H} _{2})} _{6}−NH−CO{(C{H} _{2})} _{4}−CO−]$ repeating unit. Nylon revolutionised the textile industry and was the forerunner for many of today's modern, synthetic fabrics.

Which of the following polymers are used as fibre?

synthetic polyamides polymerisation chemistry

  1. Nylon

  2. Polytetrafluoroethane

  3. Terylene

  4. Buna-S

Show answer
Correct Option: A
Explanation:

Nylon is used as fiber because, it is very important substitute of silk, it's other properties is elasticity, strength and resistance for mildew.

So the correct option is [A].

Polymer which has amide linkage is:

synthetic polyamides polymerisation chemistry

  1. nylon-$6,6$

  2. terylene

  3. teflon

  4. bakelite

Show answer
Correct Option: A
Explanation:

Polyamides have the amide linkage.

Example- Nylon 6-6, Nylon 6
Nylon 6, 6 is used in making sheets, bristles for brushes and in the textile industry.

The correct option is [A].

The ratio between the $\pi -$ bonds in the monomers of N-vinylpyrolidone and perlon-L is:

synthetic polyamides polymerisation chemistry

  1. $2 : 1$

  2. $1 : 2$

  3. $3: 2$

  4. $2 : 3$

Show answer
Correct Option: A

Which of the following polymers does not have vinylic monomer units?

synthetic polyamides polymerisation chemistry

  1. Acrilan

  2. Nylon

  3. Polystyrene

  4. Neoprene

Show answer
Correct Option: B
Explanation:
 Acrilan  $(-CH _2=CHCN-) _n$
 Polystyrene  $(-C _6H _5-CH _2=CH _2-) _n$
 Neoprene  $(-CH _2=CHCl-) _n$
 Nylon  $(Hexa methylene \,di amine + adipic\,acid) _n$

Only nylon does not have vinylic monomer units.

So the correct option is [B].

The polymer formed by the condensation of hexamethylenediamine and adipic acid is

synthetic polyamides polymerisation chemistry

  1. Teflon

  2. Bakelite

  3. Dacron

  4. Nylon-66

Show answer
Correct Option: D
Explanation:

The polymer formed by the condensation of hexamethylenediamine $\displaystyle (H _2N-(CH _2) _6-NH _2)$ and adipic acid $\displaystyle (HOOC-(CH _2) _4-COOH)$ is Nylon-66.
$\displaystyle H _2N-(CH _2) _6-NH _2+HOOC-(CH _2) _4-COOH  \xrightarrow {\Delta} H _3N^+-(CH _2) _6-NH _3^+O^-OC-(CH _2) _4-COO^-$


$\displaystyle nH _3N^+-(CH _2) _6-NH _3^+O^-OC-(CH _2) _4-COO^-\xrightarrow [-H _2O]{\Delta} \underset{\text{Nylon} 6,6}{[HN-(CH _2) _6-NH \underset {\displaystyle  \underset {\displaystyle \text {O }}{||} }{C}-(CH _2) _4- \underset {\displaystyle  \underset {\displaystyle \text {O }}{||} }{C}] _n}$

Nucleic acids are the polymers of __________

biochemical polymers polymerisation chemistry

  1. nucleosides

  2. nucleotides

  3. bases

  4. sugars

Show answer
Correct Option: B
Explanation:

Nucleic acids are made up of individual monomers called nucleotides