This set of Applied Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “Applications of Elastromers”.
1. Conveyor belts are made by _______
a) BUNA – S
b) BUNA – N
c) Thiokol
d) Teflon
View Answer
Explanation: Conveyor belts are made by the BUNA – N. Vulcanised BUNA – N is resistant to the high temperature and ageing.
2. BUNA – N is used in the auto mobiles because of its _______
a) Heavy weight
b) Light weight
c) Easy production
d) Less cost of production
View Answer
Explanation: BUNA – N is used in auto mobile industries. It is used to make the auto mobile parts because the BUNA – N is the strong polymer and has the light weight.
3. __________ are used in the air crafts.
a) Fibre rein forced plastics
b) BUNA- S
c) BUNA- N
d) Thiokol
View Answer
Explanation: The fibre rein forced plastics is used in the air crafts. They can be prepared in six types. Matched metal die moulding, injection moulding, hand lay up and continuous lamination are some of them.
4. The fibre rein forced plastics has ____________ cost of production.
a) High
b) Low
c) Moderate
d) Very high
View Answer
Explanation: The fibre rein forced plastics has a low cost of production. It has high dimensional stability. Low efficient of thermal expansion.
5. Which of the following is the example of the polysaccharides?
a) Gelatin
b) Casein
c) Silk
d) Cellulose
View Answer
Explanation: Cellulose comes under the polysaccharides. Other examples of the polysaccharides are Starch. Gelatin, casein and silk are the examples of the proteins.
6. The crystallinity in Polyhydroxy alkanoates is lie in the range of__________
a) 40%
b) 50%
c) 60%
d) 70%
View Answer
Explanation: The crystallinity in polyhydroxy alkanoates is in the range of 70%. Polyhydroxy alkanoates polymers are thermoplastics.
7. The glass transition temperature of poly lactic acid is __________
a) 20-30oC
b) 50-55oC
c) 60-65oC
d) 30-40oC
View Answer
Explanation: The glass transition temperature of poly lactic acid is 60-65oC. It possess the melting point of 173-178oC.
8. Which of the following is made by the poly lactic acid?
a) Screws
b) Staples
c) Bone plating systems
d) Tacks
View Answer
Explanation: The screws can be made by the poly lactic acid. The staples, bone plating and tacks are made by the polyhydroxy alkanoates.
9. Catering is done by the ________
a) MATER BI
b) Teflon
c) Dacron
d) Poly lactic acid
View Answer
Explanation: Catering is done by the MATTER BI. It is very strong. Catering means the making of things like cutlery, plates, cups, etc.
10. Poly vinyl acetate is soluble in the water.
a) True
b) False
View Answer
Explanation: Poly vinyl acetate is soluble in the water. It belongs to the class of the vinyl polymers.
11. Poly vinyl acetate is used in _________
a) Agriculture
b) Food industry
c) Catering
d) Waste management
View Answer
Explanation: Poly vinyl acetate is used in the food industry. The matter bi is used in the agriculture, catering and also in the waste management.
12. For making compostable packing material _______ is used.
a) Poly lactic acid
b) Polyhydroxy alkanoates
c) Dacron
d) Teflon
View Answer
Explanation: The poly lactic acid is used to prepare the compostable packing material and disposable garments etc.
13. Diaper are made by __________
a) Polyhydroxy alkanoates
b) Poly lactic acid
c) Polyesters
d) Proteins
View Answer
Explanation: Poly lactic acids are used to make the diapers, anchors, screws, pins, mesh, disposable garments, etc.
14. The conductivity of the conducting polymers increases with __________
a) Increase in temperature
b) Decrease in temperature
c) Independent of temperature
d) Independent of temperature at some conditions
View Answer
Explanation: The conductivity of the conducting polymers increases with an increase in temperature. It is temperature dependent.
15. ____________ are used for the electron beam lithography.
a) Poly lactic acid
b) Polyhydroxy alkanoates
c) Polyesters
d) Conducting polymers
View Answer
Explanation: Conducting polymers are used for the electron beam lithography. The conductivity of them increases with increase in the chain length or conjugation.
Sanfoundry Global Education & Learning Series – Applied Chemistry.
To practice all areas of Applied Chemistry, here is complete set of 1000+ Multiple Choice Questions and Answers.
