Description : The chief raw material used for manufacturing Rayon is : (1) Nylon (2) Cellulose (3) Silicon (4) Radium and Argon
Last Answer : Cellulose
Description : Pick out the wrong statement. (A) Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre (B) ... fibres are all prepared by wet spinning (D) Nylon fibres have greater water absorption capacity than polyester fibres
Last Answer : (C) Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning
Description : In the manufacture of viscose rayon, the raw material used industrially is (A) Eucalyptus wood (B) Bamboo (C) Bagasse (D) Fine teak wood
Last Answer : (D) Fine teak wood
Description : Which of the following fibres catches fire least? (1) Nylon (2) Cotton (3) Rayon (4) Terricot
Last Answer : (2) Cotton Explanation: The fibre least prone to catch fire is cotton. Fabrics with more of the fiber surface area exposed to air have more oxygen available to support, burning and therefore burn more easily. Thus, thin, gauzy fabrics, lace, or brushed fabrics can be very flammable.
Description : The first synthetic fibre made by man was- (1) Rayon (2) Nylon (3) Polyester (4) Terycott
Last Answer : (2) Nylon Explanation: Nylon, the first synthetic fiber in the "fully synthetic" sense of that term, was developed by Wallace Carothers, an American researcher at the chemical firm DuPont in the 1930s.
Description : Polycaprolactam is (A) Nylon-6 (B) Nylon-66 (C) Dacron (D) Rayon
Last Answer : (A) Nylon-6
Description : __________ fibres are made of polyamides. (A) Dacron (B) Nylon (C) Rayon (D) Orion
Last Answer : (B) Nylon
Description : The substance used in the production of nylon; rayon; explosives; fertilizers and dyes?
Last Answer : Ammonia
Description : Which synthetic fibre is known as artificial Silk? A. Nylon B. Rayon (Answer) C. Cotton D. Terylene
Last Answer : B. Rayon (Answer)
Description : For the first time, scientists have developed which fabric from the flax plant? a. Cotton b. Rayon c. Nylon d. Linen
Last Answer : d. Linen
Description : Polycaprolactam is commercially known as (A) Nylon-6 (B) Nylon-66 (C) Dacron (D) Rayon
Description : Which of the following fibres catches fire least ? (1) Nylon (2) Cotton (3) Rayon (4) Terricot
Last Answer : Cotton
Description : Viscose rayon is (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Regenerated cellulose acetate (D) None of these
Last Answer : (D) None of these
Description : The synthetic fibres produced from __________ are known as rayon. (A) Lignin (B) Cellulose (C) Polyamides (D) Ethylene glyco
Last Answer : (B) Cellulose
Description : Which of the following products is not derived from cellulose? (a) Rayon (b) Insulin (c) Gun cotton (d) Paper
Last Answer : Insulin
Description : Which of the following statements is false about cellulose? (a) It is a polymer of glucose molecules joined in β-1,4 linkages. (b) It is a major component of cotton. (c) It is used in the manufacture of Dacron fibres. (d) It is used in the manufacture of Rayon fibres
Last Answer : It is used in the manufacture of Dacron fibres.
Description : Viscose rayon is chemically (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Cellulose acetate (D) Regenerated cellulose acetate
Last Answer : (D) Regenerated cellulose acetate
Description : The purest natural form of cellulose is _______. a) rayon b)cotton c)wool d)silk
Last Answer : b)cotton
Description : The raw material to form nylon is:
Last Answer : The raw material to form nylon is: A. Adipic acid B. Butadiene C. isopreme D. ethylene
Description : Caprolactam, a raw material for the manufacture of nylon-6, isproduced from (A) Phenol (B) Naphthalene (C) Benzene (D) Pyridine
Last Answer : (C) Benzene
Description : Caprolactam (a raw material for nylon-6 manufacture) is produced from (A) Phenol (B) Naphthalene (C) Benzene (D) Pyridine
Description : Pick out the wrong statement. (A) Catalytic hydrogenation of carbon monoxide produces methyl alcohol (B) In nylon-6, the number 6 represents the total number of carbon atoms in the ring (C ... are benzene and chlorine (D) Ethanolamines are produced by using ammonia and ethylene oxide as raw material
Last Answer : (C) Raw materials for DDT manufacture are benzene and chlorine
Description : Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. (A) 10 (B) 50 (C) 80 (D) 95
Last Answer : (B) 50
Last Answer : Cotton lintus , bamboo pulp , wood pulp
Description : _________ is a natural fibre. (A) Cellulose (B) Dacron (C) Nylon-6 (D) None of these
Last Answer : (A) Cellulose
Description : Which of the following is generally not used as eord for synthetic rubber tyre casing? (A) Dacron (B) Nylon (C) Cellulose (D) None of these
Last Answer : (C) Cellulose
Description : 38. Which of the following statements is false? (1) Both starch and cellulose are polymers of glucose (2) Artificial silk is derived from cellulose (3) Nylon-66 is an example of elastomer (4) The repeat unit in natural rubber is isoprene
Last Answer : Nylon-66 is an example of elastomer
Description : Which of the following metals is in a liquid state at normal room temperature? (a) Sodium (b) Radium (c) Gallium (d) Silicon
Last Answer : Ans:(c)
Description : Which of the following elements is not present abundantly in earth’s crust ? A. Silicon B. Radium (Answer) C. Aluminum D. Carbon
Last Answer : B. Radium (Answer)
Description : Describe manufacturing of phosphoric acid with raw material. Reactions and flow diagram.
Last Answer : Phosphoric acid by wet process 1. H2SO4 leaching Reaction: Process: Phosphate rock is ground and fed to chute where a recycle stream of weak phosphoric acid washes into reaction tank. ... acid is recovered in triple effect evaporator and CaCl2 is separated from final settler.
Description : Enlist the raw material required in manufacturing of Ammonium Nitrate.
Last Answer : Raw materials required for ammonium nitrate Ammonia Nitric Acid
Description : Enlist raw material for the manufacturing of Soda Ash.
Last Answer : Raw materials for Sodium Carbonate Salt(brine) Coal limestone
Description : Explain manufacturing of Acetylene using Calcium carbide as a raw material.
Last Answer : Acetylene from CaC2 Raw materials: lime stone, coke, water Chemical reactions: CaO + 3C CaC2 + CO CaC2 + H2O Ca(OH)2 + CH≡CH Process Description: Calcium carbide is produced ... decomposes violently at 650˚C . Hence temperature is maintained below 150˚C and 30 cm of water pressure.
Description : Enlist raw material for the manufacturing of Urea.
Last Answer : Raw material for manufacturing Urea Carbon dioxide Ammonia
Description : What is the only non-metal element that is a liquid at room temperature and one atmosphere? w) bromine x) argon y) silicon z) selenium
Last Answer : ANSWER: W -- BROMINE
Description : Which of the following elements is found in the earth's crust as both a native element and as a compound? w) argon x) copper y) chlorine z) silicon
Last Answer : ANSWER: X -- COPPER
Description : Identify the group in which all the polymers mentioned can be used to make fibres. (A) Butadiene copolymers, Polyamides, Urea-formaldehyde (B) Cellulose derivatives, Polyisoprene, Polyethylene (C) Cellulose derivatives, Polyamides, Polyurethane (D) Polypropylene, Poly vinyl chloride, Silicon
Last Answer : (B) Cellulose derivatives, Polyisoprene, Polyethylene
Description : Cell walls in fungi are made of _____. a. Cellulose b. Glycogen c. Silicon d. Chitin
Last Answer : d. Chitin
Last Answer : Coal and mineral oil.
Description : Cellulose is the chief constituent of – (1) cell wall (2) cell membrane (3) secondary wall of xylem (4) body wall of insects
Last Answer : (1) cell wall Explanation: In the primary (growing) plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin. The cell wall in plants provides the most significant difference ... is rigid (up to many micrometers in thickness) and gives plant cells a much defined shape.
Description : Cellulose is the chief constituent of (1) cell wall (2) cell membrane (3) secondary wall of xylem (4) body wall of insects
Last Answer : cell wall
Description : The silicon valley where numerous microprocessor manufacturing companies are located, is in the country: a) England b) South Korea c) USA d) Mexico e) None of These
Last Answer : c) USA
Description : In a nuclear reactor the material use for absorbing neutrons is – (1) zinc (2) radium (3) lead (4) cadmium
Last Answer : (4) cadmium Explanation: One isotope of cadmium, 113Cd, absorbs neutrons with very high probability if they have an energy below the cadmium cut-off and transmits them otherwise. The cadmium ... below the cut-off are deemed slow neutrons, distinguishing them from intermediate and fast neutrons.
Description : In a nuclear reactor the material use for absorbing neutrons is (1) zinc (2) radium (3) lead (4) cadmium
Last Answer : cadmium
Description : Answer the following briefly in not more than 30 words. Name the important raw materials used in the manufacturing of cement. -SST 10th
Last Answer : Cement is an essential raw material for the for construction of buildings, factories, bridges, roads, airports, dams and for other commercial establishments. The cement industries use bulky and heavy raw materials like limestone, silica, alumina and gypsum.
Description : Name the important raw materials used in the manufacturing of cement? -Geography
Last Answer : Limestone, silica, alumina, and gypsum are important raw materials used in the manufacturing of cement.
Description : Raw materials used in the manufacturing of glass are–
Last Answer : Soda, Lime Stone Silica Sand ash
Description : What is the m What is the major differe ajor difference in focus bet nce in focus between locat ween location decision ion decisions in the service sect s in the service sector and in or and ... minimization d)The focus in manufacturing is on raw materials, while the focus in service is on labour
Last Answer : c)The focus in service is revenue maximization, while the focus in manufacturing is cost minimization
Description : The stability protocol of a tablet formulation must include? A. Vendor list for raw materials B. Batch No. C. Pharmacological category of the active substance D. Layout of the manufacturing area
Last Answer : B. Batch No.