This set of Applied Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “Synthetic Rubber”.
1. BUNA – S is otherwise called as __________
a) Sodium rubber
b) Synthesized rubber
c) Butadiene rubber
d) Styrene rubber
View Answer
Explanation: BUNA – S is otherwise called as styrene rubber. It is also called as the government rubber styrene.
2. Ameripol is nothing but _________
a) BUNA – N
b) BUNA – S
c) Dacron
d) Teflon
View Answer
Explanation: Ameripol is nothing but BUNA – S. BUNA – S stands for the composition of the monomers and catalyst.
3. In BUNA – S, the BU stands for ________
a) Butadiene
b) Butane
c) Butaraldehyde
d) 3-Butanoic acid
View Answer
Explanation: In BUNA – S, the BU stands for Butadiene. The butadiene acts as the monomer. NA acts as catalyst that is sodium and S for styrene acts as monomer.
4. Styrene rubber is a _________
a) Strong
b) Weak
c) Neither strong nor weak
d) Very weak
View Answer
Explanation: Styrene rubber is strong and tough polymer. Styrene is from benzene and ethylene in presence of anhydrous aluminium chloride as catalyst.
5. Styrene rubber is vulcanised by ___________
a) Sulphurous oxide
b) Sulphur mono chloride
c) Sulphur-di-oxide
d) Carbon
View Answer
Explanation: Styrene rubber is vulcanised by sulphur mono chloride or sulphur. It resembles natural rubber in processing characteristics and quality of finished products.
6. BUNA- S is a __________
a) Electrical insulator
b) Electrical conductor
c) Semi conductor
d) Conducts only at a certain temperature
View Answer
Explanation: BUNA – S is a good electrical insulator. Butadiene is produced from the acetaldehyde and ethyl alcohol.
7. The BUNA – S is _________ chemicals.
a) Attacked by
b) Resistant to
c) Neither resistant nor attacked
d) Neutral
View Answer
Explanation: The BUNA – S is resistant to the chemicals and it is swelled by the oils and attacked by the traces of ozone present in atmosphere.
8. Manufacture of tyres can be done by __________
a) BUNA – N
b) Thiokol rubber
c) Poly sulphide rubber
d) BUNA – S
View Answer
Explanation: Manufacture of tyres can be done by the BUNA – S. It is used in the foot ware industry for making shoe soles and foot ware components.
9. Which of the following can be made by the BUNA – S?
a) Cable insulations
b) Coats
c) Water proof clothes
d) Cosmetics
View Answer
Explanation: The cable insulations and the wires can be made by the BUNA -S. Floor files, tank linings in chemical industries and as an adhesive.
10. Which of the following rubber cannot be vulcanised?
a) BUNA – S
b) BUNA – N
c) Thiokol rubber
d) Teflon
View Answer
Explanation: The Thiokol rubber is also called as the poly sulphide rubber. The Thiokol rubber cannot be vulcanised and it cannot form hard rubber.
11. The poly sulphide rubber is resistant to __________
a) Ozone
b) Oils
c) Chemicals
d) Nitrogen
View Answer
Explanation: The poly sulphide rubber is resistant to the ozone. It is also resistance to the mineral oils, fuels, solvents, oxygen and sunlight.
12. The gaskets can be made by __________
a) Gutta-percha
b) Nitrile rubber
c) Thiokol rubber
d) BUNA – S
View Answer
Explanation: The gaskets can be made by the thiokol rubber. It is made of seals for printing rolls. They are also used for lining houses for conveying gasoline.
13. BUNA – N is a co-polymer of ___________ and __________
a) Butadiene, acrylonitrile
b) Sodium poly sulphide, ethylene dichloride
c) Benzene, ethylene
d) Acetaldehyde, ethyl alcohol
View Answer
Explanation: BUNA – N is a co-polymer of the acrylonitrile and butadiene. Thiokol is the co-polymer of the sodium poly sulphide and ethylene dichloride. Styrene is the co-polymer of the benzene and ethylene.
14. BUNA – N can be vulcanised by __________
a) Sulphur
b) Oxygen
c) Sulphur dioxide
d) Sulphurous acid
View Answer
Explanation: BUNA – N can be vulcanised by the sulphur. BU stands for the butadiene and NA stands for sodium and N stands for acrylonitrile.
15. Vulcanized BUNA – N is resistant to _________
a) High temperatures
b) Low temperature
c) Oils
d) Acids
View Answer
Explanation: Vulcanised BUNA – N is resistant to the high temperatures. The normal BUNA – N is resistant to the acids, salts, heat and oils.
Sanfoundry Global Education & Learning Series – Applied Chemistry.
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