Industrial chemistry MCQs and Answers with explanation

Industrial chemistry MCQs and Answers with explanation

1. The branch of chemistry which applies physical and chemical procedures towards the transformation of natural raw material and their derivatives to products is called

a) physical chemistry
b) classical chemistry
c) industrial chemistry
d) both b and c

... Answer is c)
Explanation: Industrial chemistry is related to application of physical and chemical procedure for manufacturing of various prouducts that are useful for humanity.

2. Which dy is used in boot polish?

a) azo dye
b) congo dye
c) methyl orange
d) bismarck brown

... Answer is d)
Explanation: Bismarck brown is used in boot polish dye.

3. Miticides are used to control

a) ticks and mites
b) fungi
c) unwanted plants
d) mice and bats

... Answer is a)
Explanation: Miticide is any substance that is used to kill ticks and mites, a kind of insects which damages the ornamental and food plants. Ticks are small in size with length of 1 mm wich becomes 3 mm after feeding. These can be seen with naked eyes. Mites are less than 1 mm in length and can not be seen by naked eyes.

4. Aerosoles and lotions are used as

a) fungicides
b) repellent
c) herbicides
d) a and c

... Answer is b)
Explanation: Aerosoles are suspension of fine solid particles or liquid droplets dispersed in air. Lotions are low viscous liquid which are prepared for application on skin. Both aerosols and lotions are used to repell the large number of biting insects and reduce the chances of being bitten by insects.

5. Petrochemicals are classified into how many classes?

a) one
b) two
c) three
d) four

... Answer is c)
Explanation: Petrochemicals are products obtained form petroleum by refining and can be classified into olefins, aromatic and synthesis gas.

6. How many classes of polymers?

a) one
b) two
c) three
d) four

... Answer is b)
Explanation: On the basis of type of polymerization (a process of combining of monomers to form large chain polymer), polymers can be divided into two classes: i. addition polymer ii. Condensation polymer

7. Nylone is a polymer obtained by

a) addition polymerization
b) condensation polymerization
c) homopolymer
d) none

... Answer is b)
Explanation: Formation of polymers by combination of monomers with elimination of small molecules like water, HCl etc is called condensation polymerization. Nylone is long chain polyamide molecule formed from monomers hexamethylenediamine and adipic acid via condensation polymerization.

8. Which of following is not a raw material for nail polish?

a) pearl
b) castor oil
c) resorcinol
d) nitrocellulose

... Answer is c)
Explanation: Raw materials for preparation of nail polish involve castor oil, pearl and nitrocellulose.

9. A polymer which becomes hard on heating is

a) thermosetting
b) thermoplastic
c) addition
d) none

... Answer is a)
Explanation: Thermosetting polymers are the polymers which become hard on heating.

10. Nail polish remover base commonly contains a mixture of two organic solvents as?

a) benzene and acetone
b) ethyl acetate and CS₂
c) benzene and CS₂
d) acetone and ethyl acetate

... Answer is d)
Explanation: Nail polish remover is based on a mixture of acetone (79%) and ethyl acetate (81%). Remainder is usually water or mixture of water and ethanol.

11. Which of the following adhesives are also known as bioadhesives

a) dying adhesives
b) synthetic adhesives
c) natural adhesives
d) hot glue

... Answer is c)
Explanation: Natural adhesives are also knwon as bioadhesives because are derived from organic source such as vegetable starch (dextrin).

12. A chemical compounds which is meant to stick things together

a) nail polish
b) lipstic
c) hair dye
d) adhesives

... Answer is d)
Explanation: Adhesive is any substance that holds two or more things together by surface attachment and resists their seperation. .

13. In early ages hair dyes were made from

a) plants
b) animals
c) metallic compounds
d) both a and c

... Answer is d)
Explanation: Hair dyes are ancient art. In early days people used to make hair dyes from plants and metallic compounds.

14. Polymers which are prepared form more than one kind of monomer are

a) homopolymer
b) copolymer
c) addition polymer
d) none

... Answer is b)
Explanation: The polyemers that is made from two or more than two different kinds of monomer are called copolymers. Back to Main Page