Balbharati solutions for Chemistry [English] 12 Standard HSC chapter 15 - Introduction to Polymer Chemistry [Latest edition]

Nylon fibres are ______.

Choose the correct option from the given alternatives.

Which of the following is naturally occurring polymer?

Silk is a kind of _____ fibre.

Choose the correct option from the given alternatives.

Dacron is another name of ______.

Choose the correct option from the given alternatives.

Which of the following is made up of polyamides?

Choose the correct option from the given alternatives.

The number of carbon atoms present in the ring of ɛ-caprolactam is ______.

Terylene is _____.

Choose the correct option from the given alternatives.

PET is formed by _______.

Choose the correct option from the given alternatives.

Chemically pure cotton is _______.

Choose the correct option from the given alternatives.

Teflon is chemically inert, due to presence of _______.

Answer the following in one sentence.

Identify 'A' in the following reaction:

Answer the following in one sentence.

Identify 'B' in the following reaction:

\[\ce{H2N -(CH2)6 - NH2 + HOOC - (CH2)4 - COOH ->[N2][533 K]}\]'B'

Complete the following statement.

Caprolactam is used to prepare _______.

Complete the following statement.

Novolac is a copolymer of _______ and _______.

Complete the following statement.

Terylene is _______ polymer of terephthalic acid and ethylene glycol

Complete the following statement.

Benzoyl peroxide used in addition polymerisation acts as _______.

Complete the following statement.

Polythene consists of polymerized_______.

Draw the flow chart diagram to show the classification of polymers based on the type of polymerization.

Answer the following in one sentence.

Write examples of addition polymers and condensation polymers.

Answer the following in one sentence.

Name some chain-growth polymers.

Answer the following in one sentence.

Define the term: Monomer

Answer the following in one sentence.

Define the term: Vulcanization

Answer the following in one sentence.

Define the term: Synthetic fibres

Answer the following in one sentence.

What type of intermolecular force leads to high-density polymer?

Answer the following in one sentence.

Give one example each of copolymer and homopolymer.

Answer the following in one sentence.

Identify thermoplastic and thermosetting plastic from the following:

1. PET
2. Urea formaldehyde resin
3. Polythene
4. Phenol formaldehyde resin

Answer the following.

Write the names of classes of polymers formed according to intermolecular forces and describe briefly their structural characteristics.

Answer the following.

Write the reaction of the formation of Nylon 6.

Answer the following.

Write the reaction of the formation of Terylene.

Answer the following.

Write structure of natural rubber and neoprene rubber along with the name and structure of their monomers.

Answer the following.

Name the polymer type in which following linkage is present.

\[\begin{array}{cc}\ce{- C - O -}\\||\phantom{.....}\\
\ce{O\phantom{.....}}\end{array}\]

Answer the following.

Write structural formula of the following synthetic rubbers:

SBR rubber

Answer the following.

Write structural formula of the following synthetic rubbers:

Buna-N rubber

Answer the following.

Write structural formula of the following synthetic rubbers:

Neoprene rubber 

Answer the following.

Match the following pairs:

Draw the structures of polymers formed from the following monomers

\[\ce{n HOOC–R–COOH + n HO–R'–OH}\]

Answer the following.

Draw the structures of polymers formed from the following monomers

H₂N–(CH₂)₅ – COOH

Name and draw structure of the repeating unit in natural rubber.

Answer the following.

Classify the following polymers as natural and synthetic polymers

1. Cellulose
2. Polystyrene
3. Terylene
4. Starch
5. Protein
6. Silicones
7. Orlon (Polyacrylonitrle)
8. Phenol-formedehyde resins

Answer the following.

What are synthetic resins? Name some natural and synthetic resins.

Answer the following.

Distinguish between thermosetting and thermoplastic resins. Write example of both the classes.

Answer the following.

Write name and formula of raw material from which bakelite is made.

Identify condensation polymers and addition polymers from the following.

\[\begin{array}{cc}\ce{-(CH2 - CH -)_{n}}\\
\phantom{....}|\\\ce{\phantom{.......}C6H5}
\end{array}\]

Identify condensation polymers and addition polymers from the following.

-(CH₂ - CH = CH - CH₂ -)_n

Identify condensation polymers and addition polymers from the following.

-(CO(CH₂)₄ - CONH(CH₂)₆NH-)_n

Identify condensation polymers and addition polymers from the following.

Attempt the following:

Write the chemical reactions involved in the manufacture of Nylon 6,6.

Attempt the following:

Explain the vulcanisation of rubber. Which vulcanizing agents are used for the following synthetic rubber?
a. Neoprene
b. Buna-N

Write chemical reaction to prepare the following polymer: Teflon

Write the reaction involved in the formation of:

Bakelite

Attempt the following:

What is meant by LDP and HDP? Mention the basic difference between the same with suitable examples.

Attempt the following:

Write preparation, properties and uses of Teflon.

Attempt the following:

Classify the following polymer as straight-chain, branched-chain and cross-linked polymers.

\[\begin{array}{cc}\ce{- (CH2 - CH -)_\text{n}}\\
\phantom{.....}|\\\ce{\phantom{.......}CN}\end{array}\]

Attempt the following:

Classify the following polymer as straight-chain, branched-chain and cross-linked polymers.

\[\begin{array}{cc}
\ce{-(CH2 - CH2 - CH - CH2 - CH2)_\text{n}}\\
|\phantom{..}\\\ce{\phantom{..}CH2}\\
|\phantom{..}\\\ce{\phantom{..}CH2}\end{array}\]

Attempt the following:

Classify the following polymer as straight-chain, branched-chain and cross-linked polymers.

Answer the following

How is polythene manufactured? Give their properties and uses.

Answer the following.

Is synthetic rubber better than natural rubber? If so, in what respect?

Answer the following.

Write main specialities of Buna-S, Neoprene rubber?

Write the structure of isoprene and the polymer obtained from it.

Answer the following.

Explain in detail free radical mechanism involved during preparation of addition polymer.