Description : What is elasticity in polymers generally related to amount of hydrogen bonding between different subunits number of subunits in the polymer chain its greater tensile strength the synthetic composure?
Last Answer : amount of hydrogen bonding between different subunitsnumber of subunits in the polymer chainits greater tensile strengththe synthetic composure
Description : Rayon is superior to cotton in making gauge for wound treatment, because rayon (A) Is a synthetic polymer (B) Does not stick to the wound unlike cotton (C) Can absorb over 90% of its own weight of water (D) Both (B) and (C)
Last Answer : (B) Does not stick to the wound unlike cotton
Description : Are All Conductive Polymers, Conjugated Polymer?
Last Answer : Answers is the place to go to get the answers you need and to ask the questions you want
Description : Pick out the wrong statement. (A) Polymers made of only one monomer is called homopolymer (B) Polymers made of more than one monomer is called copolymer or mixed polymer (C) Vulcanised rubber is more elastic than natural rubber
Last Answer : (A) Polymers made of only one monomer is called homopolyme
Description : In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres. (A) Viscose rayon (B) Acrylic (C) Polyvinyl acetate (D) Saturated polyeste
Last Answer : (D) Saturated polyeste
Description : . In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher (A) Densities (B) Melting point (C) Tensile strength (D) Hardness, rigidity & brittleness
Last Answer : (D) Hardness, rigidity & brittleness
Description : Melt spinning of polymers involves the forcing of polymer melt through spinnerates (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter ... the __________ fibres. (A) Acrylic (B) Polyester (C) Nylon 6:6 (D) Polypropylene
Last Answer : (A) Acrylic
Description : Which of the following polymers does not belong to the class of Polyacrylate polymer? (A) PMMA (B) Polyacrylonitrile (C) Poly Ethyl acrylate (D) None of these
Last Answer : (D) None of these
Description : Pick out the correct statement. (A) Plastics are good conductors of heat and electricity (B) All the polymers are highly crystalline in nature (C) Polymers can be vaporised by heating to ... D) The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation
Last Answer : (D) The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation
Description : Pick out the wrong statement regarding the solubility characteristics of high polymers. (A) Greater the degree of cross-linking in the polymer, lesser is its solubility (B) Polymers having more ... of the solvent (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Last Answer : (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Description : In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament ... is used for __________ fibres. (A) Polythene (B) PVC (C) Rayon (D) Polyvinyl acetate
Last Answer : (B) PVC
Description : Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties. (A) Thermoplastic (B) Thermosetting (C) Elastometric (D) Brittleness
Last Answer : (C) Elastometric
Description : Classify the polymers as addition and condensation polymer— Nylon 6, Neoprene and PVC.
Last Answer : Ans: Nylon 6 —Condensation polymer Neoprene and PVC— Addition polymer.
Description : Pick out the correct combination about the role of various additives used in polymers. (A) Plasticiser: increases the polymer strength (B) Heat stabiliser: increases the maximum service ... property of polymer but increases its weight (D) Lubricants: increases the flexibility of polymers
Last Answer : Option C
Description : Synthetic polymer prepared from caprolactum is known as:
Last Answer : Synthetic polymer prepared from caprolactum is known as: A. nylon-610 B. teflon C. terylene D. Nylon-6
Description : Synthetic polymer which resembler natural rubber is:
Last Answer : Synthetic polymer which resembler natural rubber is: A. neoprene B. chloroprene C. glyptal D. nylon
Description : Which one is a synthetic polymer?
Last Answer : Which one is a synthetic polymer? A. Starch B. Silk C. protein D. Neoprene
Description : Synthetic polymer produced by using terephthalic acid and ethylene glycol is (A) Terylene (B) Nylon-66 (C) PVC (D) Polystyrene
Last Answer : (A) Terylene
Description : Styrene butadiene rubber (SBR) is (A) A natural rubber (B) Another name of silicone rubber (C) A synthetic polymer (D) A synthetic monome
Last Answer : (C) A synthetic polymer
Description : Define Synthetic rubbers. Whether it is homopolymer or co-polymer?
Last Answer : Ans: Any Vuclanised rubbers like polymers. Which is getting stretched to about twice lengths and returns to the original shape and size as the external force is released. Eg. Homopolymers.
Description : What is Synthetic polymer ? Give one example.
Last Answer : Ans: Man made polymers are called Synthetic polymers. Polyethene, PVC.
Description : Styrene butadiene rubber (SBR) is (A) A natural rubber (B) A synthetic polymer (C) A synthetic monomer (D) Another name of silicone rubber
Last Answer : (B) A synthetic polymer
Description : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'
Last Answer : Option A
Description : Organic food is supposed to be better for human consumption because – (1) It is grown in glass house air tight environment (2) It is grown without the use of chemicals & synthetic pesticides (3) It depends on chemicals & fertilizers (4) It is too expensive to buy
Last Answer : (2) It is grown without the use of chemicals & synthetic pesticides Explanation: There are at least two good arguments for eating organic: fewer pesticides and more nutrients. In ... organic foods contain higher levels of antioxidants and less harmful chemicals than conventionally farmed pro-duce.
Description : Organic food is supposed to be better for human consumption because : (1) It is grown in glass house & air tight environment. (2) It is grown without the use of chemicals & synthetic pesticides. (3) It depends on chemicals & fertilizers. (4) It is too expensive to buy.
Last Answer : It is grown without the use of chemicals & synthetic pesticides.
Description : Identify the advantage of using method of images. a) Easy approach b) Boundaries are replaced by charges c) Boundaries are replaced by images d) Calculation using Poisson and Laplace equation
Last Answer : a) Easy approach
Description : Glass is a – (1) pure solid (2) supercooled liquid (3) gel (4) polymer
Last Answer : (2) supercooled liquid Explanation: Glass is an amorphous (noncrystalline) solid material. Glasses are typically brittle and optically transparent. The standard definition of a glass (or vitreous solid ... is often used to describe any amorphous solid that exhibits a glass transition temperature Tg.
Description : Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer. (A) Thermoplastic (B) Thermosetting (C) Linear (D) Glass like transparent
Last Answer : (B) Thermosetting
Description : Fibre glass is a composite material of (A) Glass fibre in a polymer matrix (B) Glass fibre in a metallic matrix (C) Polymer fibre in a glassy matrix (D) Both 'b' & 'c'
Last Answer : (A) Glass fibre in a polymer matrix
Description : Which class of material would you classify Nylon a) Fibres b) Polymer c) Ceramics d) Glass
Last Answer : b) Polymer
Description : Why have plastic containers replaced glass containers?
Last Answer : Plastic containers do not break.
Description : can the glass alone be replaced in the interior rearview mirror on a 1997 Lincoln Continental. The mirror frame is 10x2.5?
Last Answer : Yes, but you need to go to a junk yard to get the part
Description : When a fluorescent lamp has reached the end of its useful life, it should be replaced immediately, or the resultant flashing may _____________. A. blow the lamp's circuit breaker B. explode, ... fly in all directions C. short circuit the ballast transformer D. damage the starter and the ballast
Last Answer : Answer: D
Description : An air dielectric is replaced with a glass dielectric inside a capacitor of fixed dimensions. Relatively speaking, what will happen to the quantity of charge the capacitor can hold after the glass is inserted?
Last Answer : ANSWER: IT IS INCREASED WITH THE GLASS DIELECTRIC
Description : Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature. (A) Nylon (B) Polyacrylonitrile (C) Polypropylene (D) Polyester
Last Answer : (B) Polyacrylonitrile
Description : TCDD (2,3,6,7-tetrachlorodibenzo(p)dioxin) is a toxic synthetic chemical. The most consistent adverse effect observed in exposed humans is: w) liver cancer x) birth defects y) disfiguring skin eruption z) an exaggerated sense of well-being
Last Answer : ANSWER: Y -- DISFIGURING SKIN ERUPTION (CHLORACNE)
Description : Human being forms two sets of teeth during life, a set of _____teeth replaced by a set of _____teeth. Correct options in the blanks are -
Last Answer : Human being forms two sets of teeth during life, a set of _____teeth replaced by a set of ... Milky C. Deciduous , Adult D. Temporary , Milky
Description : By the 10th century AD, Buddhist art in India was being replaced by art influenced by Hinduism and _____.?
Last Answer : A. Christianity B. Judaism C. Islam D. atheism
Description : One of the reasons why FDM is being replaced by TDM is A. noise is amplified with voice when an FDM system is used B. it is difficult to place channels side by side C. there is more time than frequency D. Most available frequencies has been used
Last Answer : A. noise is amplified with voice when an FDM system is used
Description : Despite being a farmer, Lencho had an advantage over others- What was it? (a) He had ample wealth. (b) He was in possession of a large field. (c) He could read and write. (d) He had many rich friends.
Last Answer : (c) He could read and write.
Description : The hard; plastic covers of telephones are made of polymers?
Last Answer : Phenol - formaldehyde
Description : Examples of artificial polymers are?
Last Answer : Rayon; Nylon; Teflon etc.
Description : Examples of natural polymers are?
Last Answer : Cellulose; silk etc.
Description : The process by which polymers and plas- tics made from monomers?
Last Answer : Polymerisation
Description : Simplest unit of polymers?
Last Answer : Monomer
Last Answer : Big molecule
Description : Write the names of two natural polymers and what are the names of their monomers ?
Last Answer : Two natural polymers are called cellulose and protein. Cellulose monomers are called glucose and protein monomers are called amino acids.
Description : Among the following polymers, the strongest molecular forces are present in:
Last Answer : Among the following polymers, the strongest molecular forces are present in: A. elastomers B. fibres C. thermoplastics D. thermosetting polymers
Description : Polymers of the type, `X-M_(n)-Y` are called:
Last Answer : Polymers of the type, `X-M_(n)-Y` are called: A. Telomers B. copolymers C. elastomers D. invertomers