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.
Description : In vulcanisation process, rubber can be hardened by adding (1) Nitrogen (2) Silicon (3) Sulphur (4) Alcohol
Last Answer : Sulphur
Description : What is the process of improving the quality of rubber by heating it with sulphur called?
Last Answer : Vulcanization is the process whereby sulphur is heated with rubber with an activator at the temperature of between 140 degrees and 160 degrees celscius. The process is used to enhance elasticity, hardness, tensile and weather resistance.
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.
Last Answer : Vulcanization
Description : Vulcanization of rubber is carried out by adding (1) Sulphur (2) Carbon (3) Ozone (4) Phosphorus
Description : Heating rubber with sulphur for the bet- terment of its properties ike tensile steqasbh: hardness; elasticity etc. is called as?
Last Answer : Vulcanisation
Description : Line losses in a distribution circuit are kept to a minimum by __________. A. adding rubber insulation conductors to the circuit B. using higher current and lower voltage C. increasing the number of thermal relays in the circuit D. using higher voltage and lower current
Last Answer : Answer: D
Description : Brittleness induced due to the presence of sulphur in steel can be reduced by adding (A) Manganese (B) Magnesium (C) Vanadium (D) Copper
Last Answer : (A) Manganese
Last Answer : r: Option A
Description : The pH in soils can be raised by adding: a) Sand b) lime c) sulphur d) nitrogen
Last Answer : b) lime
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.
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.
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.
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.
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 : (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 ... individual polymer chains. Vulcanized materials are less sticky and have superior mechanical properties.
Description : Most commonly used rubber vulcanisation agent is (A) Sulphur (B) Bromine (C) Platinum (D) Alumina
Last Answer : (A) Sulphur
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
Description : . Most commonly used rubber vulcanising agent is (A) Sulphur (B) Bromine (C) Platinum (D) Alumina
Description : Vulcanized rubber contains sulphur (1) 2% (2) 3-5% (3) 7-9% (4) 10-15%
Last Answer : 3-5%
Description : The element which is used for vulcanizing rubber (1) Sulphur (2) Bromine (3) Silicon (4) Phosphorus
Description : The substance that is added to make natural rubber strong and more bouncy is (1) Polythene (2) Sponge (3) Sulphur (4) Chlorine
Description : Heating pyrites in air to remove sulphur is known as which name? -General Knowledge
Last Answer : The answer is 'Roasting'
Last Answer : answer:
Description : Heating pyrites in air to remove sulphur is known as which name?
Last Answer : Roasting
Description : Sulphur in metallurgical coal (A) Contributes to its heating value (B) Affects the quality of steel produced as cracks develop on the surface while rolling the steel (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as (A) It is very corrosive at elevated temperature (B) Its viscosity is not reduced on ... be further reduced) (C) It decomposes on further increasing the temperature (D) None of these
Last Answer : (B) Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)
Description : Pick out the wrong statement. (A) Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98% (B) The chemical formula of oleum is H2S2O7 , which is formed by saturating ... but technical sulphuric acid (D) Decomposition of sulphuric acid on heating does not start before its boiling
Last Answer : (D) Decomposition of sulphuric acid on heating does not start before its boiling
Description : Sulphur removal by heating of pyrite ore in presence of air is called its (A) Reduction (B) Roasting (C) Calcination (D) Smelting
Last Answer : (B) Roasting
Description : Find false statement about effect of sulphur in fuel? (A) It has heating value (B) It helps in electrostatic precipitation of ash in flue gases (C) It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low (D) It erodes furnace walls
Last Answer : (D) It erodes furnace walls
Description : 'Chlorination' is 1. A process of converting chlorides into chlorine 2. Adding small amounts of chlorine to impure water 3. A chemical reaction in which chlorine is formed 4. An addition reaction of ethylene and chlorine The correct statements are: (a) 1 and 4 (b) 2 and 4 (c) 3 and 4 (d) 1 and 2
Last Answer : Ans:(b)
Description : The process of neutralizing the fatty acids present in the oils or fats by adding sodium
Last Answer : hydroxide is called saponification.
Description : Using triangle law of vector addition, explain the process of adding two vectors which are not lying in a straight line.
Last Answer : Using triangle law of vector addition, explain the process of adding two vectors which are not lying in a straight line.
Description : The function of adding cryolite in the electrolytic reduction of alumina by Hall-Heroult process is to
Last Answer : The function of adding cryolite in the electrolytic reduction of alumina by Hall-Heroult ... D. increase the electrical canductivity of alumina
Description : The best process of disinfection of public water supply, is by (A) Boiling (B) Chlorination (C) Adding lime (D) Adding ozone
Last Answer : (B) Chlorination
Description : Permanent hardness of water can be removed by (A) Adding alum (B) Adding lime (C) Adding chlorine (D) Zeolite process
Last Answer : (D) Zeolite process
Description : The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called (A) Cementation process (B) Crucible process (C) Bessemer process (D) Open hearth process
Last Answer : Answer: Option A
Description : ‘Be bugging’ is known as A. Preventing the defects by inspection B. Fixing the defects by debugging C. Adding known defects by seeding D. A process of fixing the defects by tester
Last Answer : C. Adding known defects by seeding
Description : Which of the following is the primary reason for adding calcium carbonate to the reduction process of iron oxide ores ? The calcium carbonate: w) acts as an oxidizing agent x) removes silicate waste products y) acts as a reducing agent z) removes sulfur waste products
Last Answer : ANSWER: X -- REMOVES SILICATE WASTE PRODUCTS
Description : In the process of Selective Laser Sintering, raw material used is in the form of ______ a.machining wax b.foam core c.powder d.rubber
Last Answer : c.powder
Description : How long did it take Goodyear to perfect the process of manufacturing rubber?
Last Answer : Need answer
Description : The process involved in converting rubber into a thin sheet or coating it on fabric is called (A) Extrusion (B) Mastication (C) Calendaring (D) Vulcanisation
Last Answer : (C) Calendaring
Description : In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of (A) Stainless steel (B) Cast iron (C) Lead lined steel (D) Rubber lined steel
Last Answer : (B) Cast iron
Description : Fermenter used in the production of penicillin by deep fermentation process is a __________ lined steel vessel (A) Rubber (B) Monel (C) Glass (D) Nickel
Last Answer : (C) Glass
Description : Vulcanization is the process of cross-linking polymer chains in rubber using (a) Sulfur. (b) Formaldehye. (c) Benzoyl peroxide. (d) Ethylene glycol.
Last Answer : Sulfur.
Description : Name and describe the process which increases the stiffness of rubber.
Last Answer : Name: Vulcanization process is used to increase stiffness of rubber. Explanation: The process which involves addition of Sulphur or H2S to crude (raw) natural rubber at high temperature and ... in the rubber molecule of different rubber springs. Chemical reaction (Mechanism):