Tag: chemistry

Questions Related to chemistry

Which one of the following polymers is not properly matched to its monomer?

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. orion - acrylonirtile

  2. synthetic rubber- 2 -chlorobuta - 1, 3 - diene

  3. nylon - adipic acid & hexamethylene diamine

  4. teflon - vinyl chloride

Show answer
Correct Option: D
Explanation:

The Monomer of Teflon is tetrafluoroethylene, where vinyl chloride is the monomer of PVC.


So, the correct option is $D$

Monomer of polythene is :

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. propene

  2. isoprene

  3. chloroprene

  4. ethene

Show answer
Correct Option: D
Explanation:

Polyethylene is the most common plastic. The monomer is ethylene, a gaseous hydrocarbon with the formula ${ C } _{ 2 }{ H } _{ 4 }$ which can be viewed as a pair of methylene groups connected to each other. As it is highly reactive, the ethylene must be of high purity.

Which one of the following is a phenolic resin similar to Bakelite?

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. Catalin

  2. Melamine

  3. Celluloid

  4. Crystalate

Show answer
Correct Option: A
Explanation:

Catalin is a brand name for a thermosetting polymer that was popular from the 1930s. It is another phenolic resin, similar to Bakelite, but with different mineral fillers that allowed the production of light colors. Like Bakelite, it gives off a distinctive phenolic odour when heated.

Which of the following plastic has only aliphatic carbon atoms in their backbone chains?

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. Polyamide

  2. Polyacetal

  3. Polypropylene

  4. Teflon

Show answer
Correct Option: C

The necessary condition for a compound to form fibre is that

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. its molecules must be linear

  2. its molecules must be spherical

  3. its molecules must be rectangular

  4. its molecules must be hexagonal

Show answer
Correct Option: A
Explanation:

All polymers cannot form fibres. The key requirement of a fibre forming polymer is that the molecule must be linear. This permits their side by side alignment.

Option A is correct.

Which is found as both straight-chained and branched polymers?

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. Nucleic acids

  2. Carbohydrates

  3. Proteins

  4. Electrolytes

  5. Lipids

Show answer
Correct Option: B
Explanation:

Carbohydrates are found as both straight-chained and branched polymers.


For example, cellulose is unbranched polymer and glycogen is branched polymer.

Hence option B is correct.

Important constituent of cell wall is:

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. lipid

  2. cellulose

  3. protein

  4. vitamin

Show answer
Correct Option: B
Explanation:

Cellulose (-a long chain un-branched polymer) is an important constituent of cell wall. It is principle component of plant structure. It supports the weight of the plant.

Identify the heteropolymer from the list given below.

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. Polythene

  2. Nylon-6

  3. Teflon

  4. Nylon-6, 6

Show answer
Correct Option: D
Explanation:
A hetero-polymer derived from two or more different (but often similar) types of monomer. Nylon 66 is made of two monomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid, which give nylon 66 its name
Polythene, nylon-6 and teflon are homo polymers.

Three dimensional polymers with cross links formed in case of:

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. Thermoplastic

  2. Thermosetting plastic

  3. Both a) and b)

  4. None of these

Show answer
Correct Option: B
Explanation:

Thermosetting plastic have three dimensional network with cross linkage.When thermosetting plastics are heated they became hard.

Which polymers occur naturally?

classification of polymers introduction to polymers and its classification polymer polymers chemistry

  1. Starch and nylon

  2. Cellulose and nylon

  3. Starch and cellulose

  4. Protiens and PVC

Show answer
Correct Option: C
Explanation:

 Starch and cellulose are natural polymers. Nylon, rubber etc. are synthetic polymers.

so correct answer is C.