Tag: chemistry

Questions Related to chemistry

Synthetic fibres having almost common property are:

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. nylon and polyster

  2. nylon and plastics

  3. polyster and plastics

  4. all of the above

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Correct Option: A
Explanation:

Synthetic fibres having commmon property are nylon and polyster.

Which of the following statements is incorrect?

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. Nylon clothings can with stand high temperature and are, therefore, good to wear in summers.

  2. Thermosetting plastics do not become soft on heating.

  3. Addition polymers are formed without the elimination of byproduct molecules.

  4. Natural rubber is obtained as latex from rubber trees.

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Correct Option: A

Read the following statement and mark the correct answer.


I. Artificially prepared synthetic fibre which resembles silk is known as terylene.
II. Rayon is not considered as a synthetic fibre as it is regenerated from cellulose.
III. PET bottles and jars are made up of polyesters. 

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. Statement I is false, II and III are true

  2. Statement I is true, II and III are false

  3. Statement I and II are false, III is true

  4. Statement II is true, I and II are false

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Correct Option: A

The fibre developed in Newyork & London simultaneously is known as:

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. rayon 

  2. silk

  3. PVC

  4. nylon

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Correct Option: D

The fibre obtained from cellulose is:

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. polyester

  2. nylon

  3. acrylic

  4. rayon

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Correct Option: D
Explanation:

The fibre obtained from cellulose is rayon.


Because of the reconversion of the soluble compound to cellulose, rayon is referred to as a regenerated cellulose fibre. 

There are several types of rayon fibers in commercial use today, named according to the process by which the cellulose is converted to the soluble form and then regenerated.

Thus, option $D$ is correct.

Nylon is an example of thermoplastic.

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. True

  2. False

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Correct Option: A
Explanation:

 Nylon is a thermoplastic silky material that can be melt-processed into fibers.


Thermoplastics are the polymers which lose their shape on heating and regain their shape on cooling.

Examples: Nylon, PVC, polystyrene, etc.

Rayon is:

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. natural silk.

  2. artificial silk.

  3. regenerated fibre.

  4. synthetic fibre.

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Correct Option: C
Explanation:

Rayon is a regenerated fibre.


It is obtained from nature and then it is processed in factories in order to get the desired properties.
Hence, C is correct option.

_________  is stronger than steel wire.       

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. Cotton fibre

  2. Silk thread

  3. Plastic thread

  4. Nylon fibre

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Correct Option: D

The material similar to silk in appearance is :

chemistry substances in daily use rayon and nylon synthetic fibres synthetic fibres or threads polyester and acrylic

  1. nylon

  2. rayon

  3. polyester

  4. terylene

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Correct Option: B
Explanation:
The material similar to silk in appearance is rayon. 

Since rayon resembles silk in appearance, it is called artificial silk.

It is a man-made fibre obtained from a natural source wood pulp.

Hence the correct option is B.

Solubility is the amount of the .................... present in the saturated solution at a particular temperature.

chemistry nature of things properties of materials grouping and classification of objects sorting materials into groups

  1. solute

  2. solvent

  3. dispersed phase

  4. dispersed medium

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Correct Option: A
Explanation:

At any particular temperature, a solution that has dissolved as much solute as it is capable of dissolving, is said to be a saturated solution. In other words, when no more solute can be dissolved in a solution at a given temperature, it is called a saturated solution. The amount of the solute present in the saturated solution at this temperature is called its solubility.