125876 + Interview Questions in General QA Page 394 InterviewSolution

19651.	The figure indicates A) Reuse B) Recycle C) Recover D) Return
Answer» Correct option is B) Recycle

Discussion

19652.	Why plastic is lighter than metal?
Answer» Plastic and metal differ in their arrangement of molecules. Metals have a closely packed arrangement of atoms. The weight is distributed over a small space and therefore metals are heavy. Plastic is made up of long chains of certain chemical units. They have a loosely packed arrangement. The weight is distributed over a large space in this case and therefore plastics are light in weight.

19652.

Why plastic is lighter than metal?

Answer»

Plastic and metal differ in their arrangement of molecules. Metals have a closely packed arrangement of atoms. The weight is distributed over a small space and therefore metals are heavy.

Plastic is made up of long chains of certain chemical units. They have a loosely packed arrangement. The weight is distributed over a large space in this case and therefore plastics are light in weight.

Discussion

19653.	If we bum PET bottle, the result may be A) softened B) not softened C) cannot be bended D) A and C
Answer» Correct option is A) softened

Discussion

19654.	‘X’ is fibre. It gives smell like burning of paper in burning test and it is an artificial fibre. ‘X’ may be A) cotton B) rayon C) nylon D) acrylic
Answer» Correct option is B) rayon

Discussion

19655.	The fibre obtained by the chemical treatment of wood pulp is called:(a) Rayon(b) Silk(c) Cotton(d) Polyester
Answer» The fibre obtained by the chemical treatment of wood pulp is called Rayon.

Discussion

19656.	What characteristics make rayon better than natural silk?
Answer» Artificial rayon is cheaper than silk and can be woven like silk fibre. It can be dyed in a wide variety of colours. So artificial rayon is better than natural silk.

Discussion

19657.	The first rayon factory in India was established in …………. in 1946. A) APB) Tamil Nadu C) Kerala D) MP
Answer» Correct option is C) Kerala

Discussion

19658.	The 4 R Principle is a) Reduce, Reuse, Recycle, Recover b) Remember, reduce, Recycle, Rejoice c) Repeat,Rejoice,recycle,reduce d) None of the above
Answer» The 4 R Principle is Reduce, Reuse, Recycle, Recover.

Discussion

19659.	State the property of plastics due to which switches and plugs are made up of plastics.
Answer» Plastics are bad conductors of electricity. That is the reason why switches and plugs have an outer covering made of plastic; to avoid direct contact with the metallic part so that you would not get electric shock.

Discussion

19660.	What are thermosetting plastics? Give two examples.
Answer» Thermosetting plastics are synthetic materials which gain strength during moulding by heating, but cannot be remoulded or reheated after their initial heat, moulding. Ex : Bakelite and melamine.

19660.

What are thermosetting plastics? Give two examples.

Answer»

Thermosetting plastics are synthetic materials which gain strength during moulding by heating, but cannot be remoulded or reheated after their initial heat, moulding.

Ex : Bakelite and melamine.

Discussion

19661.	What type of plastic is used to make electric switches?
Answer» Generally, thermosetting plastics are stronger than thermoplastics. Also on application of heat, they cannot be melted or reshaped. Bakelite which is a poor conductor of electricity is used to make electric switches.

Discussion

19662.	Imagine what would happen if we do not discover plastics.
Answer» Nowadays every object used in our day to day life is made of plastic. For example milk and oil pouches, containers to store pickles and rice, buckets to store water, chains, water pipes, electrical appliances, television, radio and computers, mobile phones. So plastics has taken over the place occupied by metal wood and glass items due to its special properties. So we cannot imagine our life without plastics because it is part of each and every aspect of life.

Discussion

19663.	This method is very easy to identify both polyester and cotton yamA) burning test B) visual inspection C) weighing test D) cutting test
Answer» B) visual inspection

Discussion

19664.	S.No.Type of thread/fibreTotal weight in gr/kg required to break the thread1Cotton2Wool3Silk4NylonIn one lab activity the observations obtained are 600 gr, 1600 gr, 500 gr, 400 gr. If you fill these observations in the given table, S.No. 4 filled with A) 600 gr B) 1600gr C) 500 gr D) 400 gr
Answer» Correct option is B) 1600gr

Discussion

19665.	In “Identification of fibres – Burning test” activity what are the precautions to be taken. A) Yarn should be burnt by maintaining a minimum distance to the flame B) Yarn should not be burnt by keeping them in hands C) We should not smell the smoke D) All the above
Answer» D) All the above

Discussion

19666.	Plastics and polymer.
Answer» Plastics: Plastics are polymers having linear chains or cross-linked chains. Polymer: Many small, identical units combine to form a large unit called a polymer.

19666.

Plastics and polymer.

Answer»

Plastics: Plastics are polymers having linear chains or cross-linked chains.

Polymer: Many small, identical units combine to form a large unit called a polymer.

Discussion

19667.	Which test is conducting in the given picture?A) Plastic test B) Flame test C) Polymer test D) None
Answer» Correct option is B) Flame test

Discussion

19668.	.............. is an example of natural polymer.a) Rayon b) Cellulose c) Nylon d) All of the above
Answer» Cellulose is an example of natural polymer.

Discussion

19669.	Assertion (A): Rayon is a natural fibre. Reason (R): Rayon is prepared by using wood pulp. A) A and R are true, R supports A B) A and R are true, R does not support A C) A is true, R is false D) Both A and R are false
Answer» B) A and R are true, R does not support A

Discussion

19670.	…………… fibre is as strong as steel. A) Rayon B) Nylon C) Polyester D) Acrylic
Answer» Correct option is B) Nylon

Discussion

19671.	What is Bakelite?
Answer» Bakelite: Bakelite is a thermosetting plastic that is a poor conductor of heat and electricity so ¡t is used for making handles of various utensils.

Discussion

19672.	Where do we use bakelite?
Answer» 1. Bakelite is used for making handles of various utensils. 2. It is used for making electrical appliances including switch boards. 3. It is an alternative for pearl and jade. 4. In manufacture of telephone.

19672.

Where do we use bakelite?

Answer»

1. Bakelite is used for making handles of various utensils.

2. It is used for making electrical appliances including switch boards.

3. It is an alternative for pearl and jade.

4. In manufacture of telephone.

Discussion

19673.	In a lab, while doing flame test to examine plastics, this precaution should be taken A) wear mask to nose B) use pair of tongs C) do the test with by keep distance D) above all
Answer» Correct option is D) above all

Discussion

19674.	In a hot pin test on a substance, the given observations were done by a student a) Hot pin did not penetrate b) It left a purple bun mark c) It gave the acidic smell Then the conclusion is the, substance is made with A) melamine B) bakelite C) nylon D) thermoplastic
Answer» Correct option is B) bakelite

Discussion

19675.	Which material is used in making electrical switches?
Answer» Bakelite is used in making electrical switches. It is an example of thermosetting plastic and is a bad conductor of electricity.

Discussion

19676.	Explain why the following are made of thermosetting plastics, a) saucepan handles b) electric plugs/switches.
Answer» Above things are made up of bakelite (thermosetting plastic) because it is a) bad conductor of heat b) poor conductor of electricity

19676.

Explain why the following are made of thermosetting plastics, a) saucepan handles b) electric plugs/switches.

Answer»

Above things are made up of bakelite (thermosetting plastic) because it is

a) bad conductor of heat

b) poor conductor of electricity

Discussion

19677.	If electric switches are made by thermoplastics what would happen?
Answer» Thermoplastics are become soft on heating and they can change their shape. Heat developed due to electricity may change the shape of switches and they become soft whereas thermosetting plastics once moulded does not change their shape and they comparatively bad conductors of heat and electricity than thermoplastics. So thermo-plastics are not preferable in making of electrical switches.

Discussion

19678.	Rayon is prepared by A) Coal B) Oxygen C) Fibre D) Cellulose
Answer» Correct option is D) Cellulose

Discussion

19679.	Name the man-made fibre, made from the cellulose polymer.
Answer» Rayon is a man-made fibre which is made from wood pulp. Wood pulp contains cellulose.

Discussion

19680.	Electrical switches are made of A) Melamine B) Nylon C) Bakelite D) Rayon
Answer» Correct option is C) Bakelite

Discussion

19681.	Hot pin test is used to test A) bakeliteB) melamine C) nylon D) metal
Answer» Correct option is A) bakelite

Discussion

19682.	ResinUsageRecyclePETdrink bottle, meal packagesHDPEmilk and washing up liquid bottlePVCfood trays pipesXLDPECarrier bagsXPPchairsPSyoghurt ports, egg cartonsXOtherdining platesXFrom the given table, which are usable? A) PVC, LDPE, PS B) LDPE, HDPE, PETC) PET, HDPE D) None
Answer» Correct option is C) PET, HDPE

Discussion

19683.	1) Rayon is also called cellulose fibre 2) Acrylic is also called fake fur Choose the correct answer. A) 1 – True, 2 – True B) 1 – True, 2 – False C) 1 – False, 2 – True D) 1 – False, 2 – False
Answer» A) 1 – True, 2 – True

Discussion

19684.	This fibre is stronger than any other fibre A) rayon B) polyester C) acrylic D) nylon
Answer» Correct option is D) nylon

Discussion

19685.	The correct order is A) monomer → fibre polymer B) polymer → monomer → fibre C) monomer → polymer → fibre D) none
Answer» C) monomer → polymer → fibre

Discussion

19686.	………… is the only synthetic fibre obtained from plant’s cellulose. A) Nylon B) Plastic C) Rayon D) None
Answer» Correct option is C) Rayon

Discussion

19687.	Nylon : Synthetic fibre :: …………….. : Cellulose fibre A) Rayon B) Acrylic C) Polyester D) Silk
Answer» Correct option is A) Rayon

Discussion

19688.	Which of the following is a thermo-setting plastic? i) Bakelite ii) Melamine iii) Polythene iv) PVC A) ii and iii only true B) i and iii only true C) i and ii only true D) i and iv only true
Answer» C) i and ii only true

Discussion

19689.	Choose the correct answer. 1. Code 4 — a) PP2. Code 5 — b) PS 3. Code 6 — d) LDPE A) 1-b, 2-a, 3-c B) 1-c, 2-a, 3-b C) 1-c, 2-b, 3-a D) 1-b, 2-c, 3-a
Answer» B) 1-c, 2-a, 3-b

Discussion

19690.	The hydrogen donor of purple sulphurbactena is……… (a) H2s (b) thiosulphate (c) ethanol (d) acehc acid
Answer» The hydrogen donor of purple sulphurbactena is thiosulphate.

Discussion

19691.	Which of the following is/are thermosetting plastic?i) HDPEii) LDPEiii) Bakelite iv) Melamine A) Only (iii) B) (i) & (ii) C) (iii) & (iv) D) Only (iv)
Answer» Correct option is C) (iii) & (iv)

Discussion

19692.	P: Nylon is the first synthetic fibre. Q: Nylon is thermosetting plastic. A) P – true, Q – true B) P – true, Q – false C) P – false, Q – true D) P – false, Q – false
Answer» B) P – true, Q – false

Discussion

19693.	Example of thermosetting plastic is A) Bakelite B) Melamine C) Polyethene D) Both A & B
Answer» D) Both A & B

Discussion

19694.	Different types of fibres.
Answer» Terylene: The artificial fibre obtained from polymer to make a cloth. Terylene ¡s most popular polyester. Terriwool: Terriwool is an artificial fibre made from polymer It is a mixture of terylene and wool TerriThermoplostcs ‘b”: The plastics which will be deformed easily on heating and can be bent

19694.

Different types of fibres.

Answer»

Terylene: The artificial fibre obtained from polymer to make a cloth. Terylene ¡s most popular polyester.

Terriwool: Terriwool is an artificial fibre made from polymer It is a mixture of terylene and wool

TerriThermoplostcs ‘b”: The plastics which will be deformed easily on heating and can be bent

Discussion

19695.	Universal recycling symbol.
Answer» Universal recycling symbol: In a recycling icon if the number that identifies the polymer is omitted then the symbol is called the universal recycling symbol.

Discussion

19696.	Name the hydrogen donor of green sulphur bacteria and purple sulphur bacteria.
Answer» Hydrogen donor of green sulphur bacteria is H₂S. Hydrogen donor of purple Sulphur bacteria is thiosulphate.

Discussion

19697.	What are capnophilic bacteria? Give an example.
Answer» Bacteria which require CO₂ for their growth are called as capnophilic bacteria. Example: Campylobacter.

Discussion

19698.	Thermosetting plastic.
Answer» Thermosetting plastic: The plastics which moulded once can’t be softened by heating are called thermosetting plastics.

Discussion

19699.

Distinguish between photolithotrophs and photoorganotrophs.

Answer»

Photolithotrophs	Photoorganotrophs
In photothotrophs, the hydrogen donor is an organic acid or alcohol.	In photoorganotrophs, the hydrogen donor is an inorganic substance E.g, Chlorobium E.g. Rhodospirillum

Discussion

19700.

In human males, the testes lie in the scrotal sacs outside the body because it helps in the : A. process of mating B. formation of sperms C. easy transfer of sperms D. all the above

Answer»

B. formation of sperms

The testes are located outside the abdominal cavity in the scrotum because the temperature of scrotum is less than the normal body temperature which is requires for sperm formation.

Discussion

Explore topic-wise InterviewSolutions in .

The figure indicates A) Reuse B) Recycle C) Recover D) Return

Why plastic is lighter than metal?

If we bum PET bottle, the result may be A) softened B) not softened C) cannot be bended D) A and C

‘X’ is fibre. It gives smell like burning of paper in burning test and it is an artificial fibre. ‘X’ may be A) cotton B) rayon C) nylon D) acrylic

The fibre obtained by the chemical treatment of wood pulp is called:(a) Rayon(b) Silk(c) Cotton(d) Polyester

What characteristics make rayon better than natural silk?

The first rayon factory in India was established in …………. in 1946. A) APB) Tamil Nadu C) Kerala D) MP

The 4 R Principle is a) Reduce, Reuse, Recycle, Recover b) Remember, reduce, Recycle, Rejoice c) Repeat,Rejoice,recycle,reduce d) None of the above

State the property of plastics due to which switches and plugs are made up of plastics.

What are thermosetting plastics? Give two examples.

What type of plastic is used to make electric switches?

Imagine what would happen if we do not discover plastics.

This method is very easy to identify both polyester and cotton yamA) burning test B) visual inspection C) weighing test D) cutting test

S.No.Type of thread/fibreTotal weight in gr/kg required to break the thread1Cotton2Wool3Silk4NylonIn one lab activity the observations obtained are 600 gr, 1600 gr, 500 gr, 400 gr. If you fill these observations in the given table, S.No. 4 filled with A) 600 gr B) 1600gr C) 500 gr D) 400 gr

In “Identification of fibres – Burning test” activity what are the precautions to be taken. A) Yarn should be burnt by maintaining a minimum distance to the flame B) Yarn should not be burnt by keeping them in hands C) We should not smell the smoke D) All the above

Plastics and polymer.

Which test is conducting in the given picture?A) Plastic test B) Flame test C) Polymer test D) None

.............. is an example of natural polymer.a) Rayon b) Cellulose c) Nylon d) All of the above

Assertion (A): Rayon is a natural fibre. Reason (R): Rayon is prepared by using wood pulp. A) A and R are true, R supports A B) A and R are true, R does not support A C) A is true, R is false D) Both A and R are false

…………… fibre is as strong as steel. A) Rayon B) Nylon C) Polyester D) Acrylic

What is Bakelite?

Where do we use bakelite?

In a lab, while doing flame test to examine plastics, this precaution should be taken A) wear mask to nose B) use pair of tongs C) do the test with by keep distance D) above all

In a hot pin test on a substance, the given observations were done by a student a) Hot pin did not penetrate b) It left a purple bun mark c) It gave the acidic smell Then the conclusion is the, substance is made with A) melamine B) bakelite C) nylon D) thermoplastic

Which material is used in making electrical switches?

Explain why the following are made of thermosetting plastics, a) saucepan handles b) electric plugs/switches.

If electric switches are made by thermoplastics what would happen?

Rayon is prepared by A) Coal B) Oxygen C) Fibre D) Cellulose

Name the man-made fibre, made from the cellulose polymer.

Electrical switches are made of A) Melamine B) Nylon C) Bakelite D) Rayon

Hot pin test is used to test A) bakeliteB) melamine C) nylon D) metal

ResinUsageRecyclePETdrink bottle, meal packagesHDPEmilk and washing up liquid bottlePVCfood trays pipesXLDPECarrier bagsXPPchairsPSyoghurt ports, egg cartonsXOtherdining platesXFrom the given table, which are usable? A) PVC, LDPE, PS B) LDPE, HDPE, PETC) PET, HDPE D) None

1) Rayon is also called cellulose fibre 2) Acrylic is also called fake fur Choose the correct answer. A) 1 – True, 2 – True B) 1 – True, 2 – False C) 1 – False, 2 – True D) 1 – False, 2 – False

This fibre is stronger than any other fibre A) rayon B) polyester C) acrylic D) nylon

The correct order is A) monomer → fibre polymer B) polymer → monomer → fibre C) monomer → polymer → fibre D) none

………… is the only synthetic fibre obtained from plant’s cellulose. A) Nylon B) Plastic C) Rayon D) None

Nylon : Synthetic fibre :: …………….. : Cellulose fibre A) Rayon B) Acrylic C) Polyester D) Silk

Which of the following is a thermo-setting plastic? i) Bakelite ii) Melamine iii) Polythene iv) PVC A) ii and iii only true B) i and iii only true C) i and ii only true D) i and iv only true

Choose the correct answer. 1. Code 4 — a) PP2. Code 5 — b) PS 3. Code 6 — d) LDPE A) 1-b, 2-a, 3-c B) 1-c, 2-a, 3-b C) 1-c, 2-b, 3-a D) 1-b, 2-c, 3-a

The hydrogen donor of purple sulphurbactena is……… (a) H2s (b) thiosulphate (c) ethanol (d) acehc acid

Which of the following is/are thermosetting plastic?i) HDPEii) LDPEiii) Bakelite iv) Melamine A) Only (iii) B) (i) &amp; (ii) C) (iii) &amp; (iv) D) Only (iv)

P: Nylon is the first synthetic fibre. Q: Nylon is thermosetting plastic. A) P – true, Q – true B) P – true, Q – false C) P – false, Q – true D) P – false, Q – false

Example of thermosetting plastic is A) Bakelite B) Melamine C) Polyethene D) Both A &amp; B

Different types of fibres.

Universal recycling symbol.

Name the hydrogen donor of green sulphur bacteria and purple sulphur bacteria.

What are capnophilic bacteria? Give an example.

Thermosetting plastic.

Distinguish between photolithotrophs and photoorganotrophs.

In human males, the testes lie in the scrotal sacs outside the body because it helps in the : A. process of mating B. formation of sperms C. easy transfer of sperms D. all the above

Which of the following is/are thermosetting plastic?i) HDPEii) LDPEiii) Bakelite iv) Melamine A) Only (iii) B) (i) & (ii) C) (iii) & (iv) D) Only (iv)

Example of thermosetting plastic is A) Bakelite B) Melamine C) Polyethene D) Both A & B