Vulcanization

Q. Why vulcanized rubber is used to make rubber tyres rather than natural rubber?

Q. The process of heating rubber with sulphur to improve its hardness is known as ________.

1. pulping
2. vucanization
3. recycling
4. sulphonation

Q. Which amongst the following is used in the vulcanisation of rubber?

1. Carbon
2. Sulphur
3. Nitrogen
4. Oxygen

Q. Why is sulphur used in the tyre making companies?

1. Oxygen
2. Polonium
3. Tellurium
4. Sulphur

Q.

Which of the following is added to rubber during vulcanization?

1. 
   

   Cotton

2. 
   

   Sulphur

3. 
   

   Silicon

4. Aluminium

   
   

Q. Choose the properties of vulcanised rubber from the following options.

1. Eco-friendly
2. Non-sticky
3. Water-resistant
4. Highly elastic

Q. is the process of heating rubber with sulphur to improve its strength and hardness.

1. Vulcanisation
2. Pulping
3. Galvanisation

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is rubber? Name some common objects that are made of rubber.

Q. Identify the substances that are made up of vulcanised rubber.

1. 
2. 
3. 
4. 

Q.

Rubber comes from mulberry trees.

1. True
2. False

Q. The process of heating rubber with sulphur to improve its hardness is known as ________.

1. pulping
2. vulcanisation
3. sulphonation
4. recycling

Q. The most common type of belt is made up of

1. Kirmich
2. Rubber
3. Leather
4. Cotton thread

Q.

Which of the following is added to rubber during vulcanization?

1. 
   

   Cotton

2. 
   

   Sulphur

3. 
   

   Silicon

4. Aluminium

   
   

Q. The hardness of the vulcanised rubber depends on the amount of _________ added to it.

1. carbon
2. nitrogen
3. oxygen
4. sulphur

Q. Vulcanized rubber is a non-sticky solid.

1. True
2. False

Q. Identify the materials made from rubber.

1. Tyres
2. Ink
3. Bulb
4. Thermocol
5. Erasers
6. Gloves
7. Balloons
8. Elastic bands

Q. Sulphur is added in natural rubber to soften it.

1. True
2. False