The substance that is added to make natural rubber strong and more bouncy is – (1) Polythene (2) Sponge (3) Sulphur (4) Chlorine

The substance that is added to make natural rubber strong and more bouncy is – (1) Polythene (2) Sponge (3) Sulphur (4) Chlorine
by

1 Answer

Answer :

(3) Sulphur Explanation: Vulcanization is a chemical process for converting rubber or related polymers into more durable materials via the addition of sulfur or other equivalent "curatives" or "accelerators". These additives modify the polymer by forming crosslinks (bridges) between individual polymer chains. Vulcanized materials are less sticky and have superior mechanical properties.
by
selected

Related questions

The substance that is added to make natural rubber strong and more bouncy is (1) Polythene (2) Sponge (3) Sulphur (4) Chlorine

Description : The substance that is added to make natural rubber strong and more bouncy is (1) Polythene (2) Sponge (3) Sulphur (4) Chlorine

Last Answer : Sulphur

Pick out the wrong statement. (A) Polystyrene is a thermoplastic polymer (B) Protein is a natural polymer (C) Neoprene is a natural rubber (D) Polythene is a copolymer, while SBR is a homopolymer

Description : Pick out the wrong statement. (A) Polystyrene is a thermoplastic polymer (B) Protein is a natural polymer (C) Neoprene is a natural rubber (D) Polythene is a copolymer, while SBR is a homopolymer

Last Answer : (C) Neoprene is a natural rubber

Which of the following is used to make light weight, but strong plastic? (1) Nylon (2) Polythene (3) Polyvinyl Chloride (4) Methyl Methacrylate

Description : Which of the following is used to make light weight, but strong plastic? (1) Nylon (2) Polythene (3) Polyvinyl Chloride (4) Methyl Methacrylate

Last Answer : (3) Polyvinyl Chloride Explanation: Polyvinyl chloride (PVC) is a common, strong but lightweight plastic that is used in making tough plastic. It is used for flexible applications such ... cables. It is the third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene.

Which of the following is used to make light weight, but strong plastic ? (1) Nylon (2) Polythene (3) Polyvinyl Chloride (4) Methyl Methacrylate

Description : Which of the following is used to make light weight, but strong plastic ? (1) Nylon (2) Polythene (3) Polyvinyl Chloride (4) Methyl Methacrylate

Last Answer : Polyvinyl Chloride

In vulcanization, natural rubber is heated with- (1) Carbon (2) Sulphur (3) Silicon (4) Phosphorus

Description : In vulcanization, natural rubber is heated with- (1) Carbon (2) Sulphur (3) Silicon (4) Phosphorus

Last Answer : (2) Sulphur Explanation: Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur, which results in three-dimensional crosslinking of the chain rubber molecules (polyisoprene) bonded to each other by sulfur atoms.

Which of the following is most elastic ? A. Steel (Answer) B. Rubber C. Glass D. Sponge E. None of these

Description : Which of the following is most elastic ? A. Steel (Answer) B. Rubber C. Glass D. Sponge E. None of these

Last Answer : A. Steel (Answer)

Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays

Description : Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays

Last Answer : (A) Polymeric fibres are never produced by addition polymerisation

The sulphur in sulphur sodium battery is absorbed by___ sponge. • Sodium • Carbon • Wire • Cellulose

Description : The sulphur in sulphur sodium battery is absorbed by___ sponge. • Sodium • Carbon • Wire • Cellulose

Last Answer : • Carbon

Polythene (low or high density) containers are not corroded by (A) Sulphuric acid (10%) at room temperature (B) Nitric acid (95%) at room temperature (C) Sulphur trioxide at 60°C (D) Any of these

Description : Polythene (low or high density) containers are not corroded by (A) Sulphuric acid (10%) at room temperature (B) Nitric acid (95%) at room temperature (C) Sulphur trioxide at 60°C (D) Any of these

Last Answer : (A) Sulphuric acid (10%) at room temperature

Pick out the wrong statement. (A) Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust (B) NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light (C) Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees (D) H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2

Description : Pick out the wrong statement. (A) Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust (B) NO2 is capable of penetrating the troposphere and ... at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2

Last Answer : (D) H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2

Which of the following is a natural polymer? (1) Bakelite (2) Nylon (3) Polythene (4) Starch

Description : Which of the following is a natural polymer? (1) Bakelite (2) Nylon (3) Polythene (4) Starch

Last Answer : (4) Starch Explanation: Cotton, starch, cellulose and rubber are some of the naturally occurring polymers. Starch is a condensation polymer made up of hundreds of glucose monomers, which split out ... is also referred to as a polysaccharide, because it is a polymer of the monosaccharide glucose.

Which of the following is a natural polymer? (1) Bakelite (2) Nylon (3) Polythene (4) Starch

Description : Which of the following is a natural polymer? (1) Bakelite (2) Nylon (3) Polythene (4) Starch

Last Answer : (4) Starch Explanation: Cotton, starch, cellulose and rubber are some of the naturally occurring polymers. Starch is a condensation polymer made up of hundreds of glucose monomers, which split out water molecules as they chemically combine.

Which of the following is a natural polymer? (1) Bakelite (2) Nylon (3) Polythene (4) Starch

Description : Which of the following is a natural polymer? (1) Bakelite (2) Nylon (3) Polythene (4) Starch

Last Answer : Starch

Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its (A) Elasticity (B) Strength (C) Plasticity (D) Weathering characteristics

Description : Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its (A) Elasticity (B) Strength (C) Plasticity (D) Weathering characteristics

Last Answer : (D) Weathering characteristics

Flash game where you control several (probably 6) small bouncy balls?

Description : Flash game where you control several (probably 6) small bouncy balls?

Last Answer : answer:The only game I am aware of with a bouncy red ball, is Red BALL 6, it is somewhat like sonic or Cool Spot. It is not easy to play withiut a joystick, at least for me. http://www.redball.biz/redball/6/

My first four letters describe a bouncy toy. My last four letters mean crazy. I am both tall and short, long and narrow. I scream when you poke me. What am I? -Riddles

Description : My first four letters describe a bouncy toy. My last four letters mean crazy. I am both tall and short, long and narrow. I scream when you poke me. What am I? -Riddles

Last Answer : A balloon.

what is the most bouncy thing?

Description : what is the most bouncy thing?

Last Answer : a sky ball is the bounciest thing

Can I Hire a Bouncy Castle for a Kids Birthday Party in Denver Colorado?

Description : Can I Hire a Bouncy Castle for a Kids Birthday Party in Denver Colorado?

Last Answer : Yes, there are fantastic bouncy house Denver CO services that you can use to hire a bouncy castle for a child's birthday party anywhere in Denver. I personally benefitted a great deal from the bouncy castles. ... for as long as I can remember, all for a price that was so easy on my pocket.

Baby Bouncy Seats?

Description : Baby Bouncy Seats?

Last Answer : Bouncy Seat ReviewMost babies love to sit in a bouncy seat. They like the colors and the vibrations of the seat. Parents need to make sure the bouncy seat they have is safe to use. There are weight ... seats are a great way for babies to go to sleep because of the constant movement of the seat.

Which of the following is Colourless? (1) Chlorine (2) Oxygen (3) Phosphorus (4) Sulphur

Description : Which of the following is Colourless? (1) Chlorine (2) Oxygen (3) Phosphorus (4) Sulphur

Last Answer : (2) Oxygen

Which one of the following does not form oxyacid? (1) Sulphur (2) Chlorine (3) Nitrogen (4) Fluorine

Description : Which one of the following does not form oxyacid? (1) Sulphur (2) Chlorine (3) Nitrogen (4) Fluorine

Last Answer : (4) Fluorine Explanation: Fluorine cannot form oxyacid because fluorine is more electronegative than oxygen. For oxygen to bind, it must be a positively charged ion.

Bleaching powder is made from - (1) Sulphur dioxide and gypsum (2) Chlorine and Charcoal (3) Soda ash and lime (4) Lime and Chlorine

Description : Bleaching powder is made from - (1) Sulphur dioxide and gypsum (2) Chlorine and Charcoal (3) Soda ash and lime (4) Lime and Chlorine

Last Answer : (4) Lime and Chlorine Explanation: The gas which is used in the preparation of bleaching powder is chlorine. It is a mixture of lime and calcium chloride.

Which of the following is used for refrigeration? (1) Sulphur dioxide (2) Chlorine (3) Freon (4) Phosphine

Description : Which of the following is used for refrigeration? (1) Sulphur dioxide (2) Chlorine (3) Freon (4) Phosphine

Last Answer : (3) Freon Explanation: Common refrigerants used in domestic refrigerators are Freon, neon and nitrogen. It flows through four components of refrigerator again and again.

Which of the following gases is most toxic? (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Chlorine

Description : Which of the following gases is most toxic? (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Chlorine

Last Answer : (2) Carbon monoxide Explanation: Carbon monoxide (CO) is a colourless, odorless, and tasteless gas that is slightly lighter than air. It is toxic to humans and animals when encountered in ... formation of groundlevel ozone. Carbon monoxide is colourless, odorless, and tasteless, but highly toxic.

Which one of the following does not form oxyacid ? (1) Sulphur (2) Chlorine (3) Nitrogen (4) Fluorine

Description : Which one of the following does not form oxyacid ? (1) Sulphur (2) Chlorine (3) Nitrogen (4) Fluorine

Last Answer : Fluorine

Which of the following is colourless ? (1) Chlorine (2) Oxygen (3) Phosphorus (4) Sulphur

Description : Which of the following is colourless ? (1) Chlorine (2) Oxygen (3) Phosphorus (4) Sulphur

Last Answer : Oxygen

Which of the following is used for refrigeration? (1) Sulphur dioxide (2) Chlorine (3) Freon (4) Phosphine

Description : Which of the following is used for refrigeration? (1) Sulphur dioxide (2) Chlorine (3) Freon (4) Phosphine

Last Answer : Freon

Which of the following gases is most toxic ? (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Chlorine

Description : Which of the following gases is most toxic ? (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Chlorine

Last Answer : Carbon monoxide

The element used for vulcanizing rubber is - (1) Sulphur (2) Bromine (3) Silicon (4) Phosphorus

Description : The element used for vulcanizing rubber is - (1) Sulphur (2) Bromine (3) Silicon (4) Phosphorus

Last Answer : (1) Sulphur Explanation: The vulcanization of neoprene or polychloroprene rubber (CR rubber) is carried out using metal oxides (specifically MgO and ZnO, sometimes Pb3O4) rather than sulfur compounds which are presently used with many natural and synthetic rubbers.

The process of improving the quality of rubber by heating it with sulphur is called. (1) Vulcanization (2) Acceleration (3) Sulphonation (4) Galvanization

Description : The process of improving the quality of rubber by heating it with sulphur is called. (1) Vulcanization (2) Acceleration (3) Sulphonation (4) Galvanization

Last Answer : (1) Vulcanization Explanation: Vulcanization is a chemical process for converting natural rubber into more durable materials via the addition of sulfur or other equivalent curatives or accelerators. These additives modify the polymer by forming crosslinks (bridges) between individual polymer chains.

Vulcanized rubber contains sulphur – (1) 2% (2) 3-5% (3) 7-9% (4) I 0- 5%

Description : Vulcanized rubber contains sulphur – (1) 2% (2) 3-5% (3) 7-9% (4) I 0- 5%

Last Answer : (2) 3-5% Explanation: A vulcanized flexible tyre rubber contains about 3 -5% of sulphur whereas hard rubber (ebonite) contains about 32% of sulphur. The stiffness of vulcanized rubber depends on the amount of sulphur added.

The element which is used for vulcanizing rubber – (1) Sulphur (2) Bromine (3) Silicon (4) Phosphorus

Description : The element which is used for vulcanizing rubber – (1) Sulphur (2) Bromine (3) Silicon (4) Phosphorus

Last Answer : (1) Sulphur Explanation: Vulcanisation is a chemical process for converting rubber or related polymers into more durable materials via the addition of sulfur or other equivalent "curatives" or "accelerators". By far the most common vulcanizing methods depend on sulfur.

In vulcanisation process, rubber can be hardened by adding - (1) Nitrogen (2) Silicon (3) Sulphur (4) Alcohol

Description : In vulcanisation process, rubber can be hardened by adding - (1) Nitrogen (2) Silicon (3) Sulphur (4) Alcohol

Last Answer : (3) Sulphur Explanation: In order to give more strength and more elasticity, natural rubber is heated with sulphur or sulphur compounds at 150°C temperature. Vulcanized rubber has good tensile strength.

Vulcanized rubber contains sulphur (1) 2% (2) 3-5% (3) 7-9% (4) 10-15%

Description : Vulcanized rubber contains sulphur (1) 2% (2) 3-5% (3) 7-9% (4) 10-15%

Last Answer : 3-5%

The process of improving the quality of rubber by heating it with sulphur is called. (1) Vulcanization (2) Acceleration (3) Sulphonation (4) Galvanization

Description : The process of improving the quality of rubber by heating it with sulphur is called. (1) Vulcanization (2) Acceleration (3) Sulphonation (4) Galvanization

Last Answer : Vulcanization

In vulcanisation process, rubber can be hardened by adding (1) Nitrogen (2) Silicon (3) Sulphur (4) Alcohol

Description : In vulcanisation process, rubber can be hardened by adding (1) Nitrogen (2) Silicon (3) Sulphur (4) Alcohol

Last Answer : Sulphur

The element which is used for vulcanizing rubber (1) Sulphur (2) Bromine (3) Silicon (4) Phosphorus

Description : The element which is used for vulcanizing rubber (1) Sulphur (2) Bromine (3) Silicon (4) Phosphorus

Last Answer : Sulphur

Vulcanization of rubber is carried out by adding (1) Sulphur (2) Carbon (3) Ozone (4) Phosphorus

Description : Vulcanization of rubber is carried out by adding (1) Sulphur (2) Carbon (3) Ozone (4) Phosphorus

Last Answer : Sulphur

Which one of the following statements is not correct? Vulcanisation of rubber makes it - (1) soft and flexible (2) strong and hard (3) chemical resistant (4) withstand higher temperatures

Description : Which one of the following statements is not correct? Vulcanisation of rubber makes it - (1) soft and flexible (2) strong and hard (3) chemical resistant (4) withstand higher temperatures

Last Answer : (1) soft and flexible Explanation: In order to give more strength and more elasticity, natural rubber is heated with sulphur or sulphur compounds at 150°C temperature. Vulcanized rubber has good ... of vulcanized rubber is enhanced up to 100°C. It has good resistance to organic solvents.

Which one of the following statements is not correct? Vulcanisation of rubber makes it (1) soft and flexible (2) strong and hard (3) chemical resistant (4) withstand higher temperatures

Description : Which one of the following statements is not correct? Vulcanisation of rubber makes it (1) soft and flexible (2) strong and hard (3) chemical resistant (4) withstand higher temperatures

Last Answer : soft and flexible

Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of (A) Lumps (B) Pellets (C) Briquettes (D) Sinte

Description : Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of (A) Lumps (B) Pellets (C) Briquettes (D) Sinte

Last Answer : Option B

Addition of H2 to acetylene gives ethane in presence of palladium but if BaSO4 and quinoline or sulphur are also added, the product is ethane. Why ?

Description : Addition of H2 to acetylene gives ethane in presence of palladium but if BaSO4 and quinoline or sulphur are also added, the product is ethane. Why ?

Last Answer : Ans. BaSO4 + quinoline / s poison the catalyst. Hence, the efficiency of the catalyst decreases and the reaction stops at the first stage of reduction. 

Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system? (A) High silicon iron, silicon rubber, Kel-F and Teflon (B) Mild steel and stainless steel (C) Cast iron, tin and aluminium (D) Copper, nickel and Monel

Description : Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system? (A) High silicon iron, silicon rubber ... Mild steel and stainless steel (C) Cast iron, tin and aluminium (D) Copper, nickel and Monel

Last Answer : (A) High silicon iron, silicon rubber, Kel-F and Teflon

Coal burning power plants and factories are responsible for about 86% of - (a) carbon monoxide in the atmosphere (b) sulphur dioxide in the atmosphere (c) chlorine in the atmosphere (d) nitrogen dioxide in the atmosphere

Description : Coal burning power plants and factories are responsible for about 86% of - (a) carbon monoxide in the atmosphere (b) sulphur dioxide in the atmosphere (c) chlorine in the atmosphere (d) nitrogen dioxide in the atmosphere

Last Answer : Ans:(b)

The Taj Mahal is threatened due to the effect of (a) oxygen (b) hydrogen (c) chlorine (d) sulphur dioxide.

Description : The Taj Mahal is threatened due to the effect of (a) oxygen (b) hydrogen (c) chlorine (d) sulphur dioxide.

Last Answer : b) hydrogen

Washing of coal (A) Reduces its ash & sulphur content (B) Improves its coking properties (C) Increase the fusion point of its ash by removing chlorine compounds (D) All (A), (B) and (C)

Description : Washing of coal (A) Reduces its ash & sulphur content (B) Improves its coking properties (C) Increase the fusion point of its ash by removing chlorine compounds (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

For the metamorphosis of tadpoles which of the following element must be available in water? a) carbon b)Chlorine c)Sulphur d)iodine

Description : For the metamorphosis of tadpoles which of the following element must be available in water? a) carbon b)Chlorine c)Sulphur d)iodine

Last Answer : d)iodine

Example of non-metal which exist in solid state is __________ . a) sulphur b)bromine c)chlorine d)oxygen

Description : Example of non-metal which exist in solid state is __________ . a) sulphur b)bromine c)chlorine d)oxygen

Last Answer : a) sulphur

0.257g of organic substance was heated with conc. sulphuric acid and then distilled with excess of strong alkali .the ammonia gas evolved was absorbed in 50ml of .1M HCl which required 23.2ml of c for neutralization at the end of the process. Determine the % of nitrogen in the compound ?

Description : 0.257g of organic substance was heated with conc. sulphuric acid and then distilled with excess of strong alkali .the ammonia gas evolved was absorbed in 50ml of .1M HCl which required 23.2ml of c for neutralization at the end of the process. Determine the % of nitrogen in the compound ?

Last Answer : A. Vol of 0 .1M HCl taken = 50ml Vol of .1MNaOH used for neutralization of unused acid=23.2ml Now, 23.2 ml of .1MNaOH =23.2ml of .1MHCl Vol of .1MHCl unused=23.2ml Vol of .1MHCl required ... NH3 solution contain nitrogen = 14*26.8/10*1000 Percentage of Nitrogen=14*26.8*100/10*1000*.257 =14.6%

What is the word that describes a substance that reacts with both strong acids and strong bases?

Description : What is the word that describes a substance that reacts with both strong acids and strong bases?

Last Answer : ANSWER: AMPHOTERIC