Description : Which one among the following is not removed as a waste product from the body of a plant? (a) Resins and Gums (b) Urea (c) Dry Leaves (d) Excess Water
Last Answer : Answer: (b)
Description : Size reduction of __________ is accomplished in steam heated rollers and roll crushers. (A) Resins (B) Gums (C) Hard rubber (D) Waxes
Last Answer : (C) Hard rubber
Description : Size reduction of moulding powders, waxes, resins & gums are done in a __________ mill. (A) Cage (B) Hammer (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Which of the plant products is used in leather industry? (1) Resin (2) Mucilage (3) Latex (4) Tannin
Last Answer : (4) Tannin Explanation: A tannin is an astringent, bitter plant polyphenolic compound that binds to and precipitates proteins and various other organic compounds including amino acids and alkaloids. It refers ... agents are also in use today and account for 90% of the world's leather production
Description : Which of the plant products is used in leather industry ? (1) Resin (2) Mucilage (3) Latex (4) Tannin
Last Answer : Tannin
Description : Which of the following is present as a marker in lysosomal enzymes to direct them to their destination? (A) Glucose-6-phosphate (B) Mannose-6-phosphate (C) Galactose-6-phosphate (D) N-Acetyl neuraminic acid
Last Answer : Answer : C
Description : Algae have cells made up of (a) cellulose, galactans and mannans (b) hemicellulose, pectins and proteins (c) pectins, cellulose and proteins (d) cellulose, hemicellulose and pectins
Last Answer : (a) cellulose, galactans and mannans
Description : Glycoproteins are marked for destruction by removal of their (A) Oligosaccharide prosthetic group (B) Sialic acid residues (C) Mannose residues (D) N-terminal amino acids
Last Answer : Answer : D
Description : In the intestine the rate of absorption is highest for (A) Glucose and galactose (B) Fructose and mannose (C) Fructose and pentose (D) Mannose and pentose
Last Answer : Answer : A
Description : Selwanof’s test is positive in (A) Glucose (B) Fructose (C) Galactose (D) Mannose
Last Answer : Answer : B
Description : I-cell disease results from absence of the following from lysosomal enzymes: (A) Signal sequence (B) Mannose-6-phosphate (C) Sialic acid (D) A serine residue
Description : Invert sugar is (A) Lactose (B) Mannose (C) Fructose (D) Hydrolytic product of sucrose
Last Answer : D
Description : Starch and glycogen are polymers of (A) Fructose (B) Mannose (C) α−D-Glucose (D) Galactose
Last Answer : C
Description : Barfoed’s solution is not reduced by (A) Glucose (B) Mannose (C) Sucrose (D) Ribose
Description : The following is actively absorbed in the intestine: (A) Fructose (B) Mannose (C) Galactose (D) None of these
Description : Which of the following is an epimeric pair? (A) Glucose and fructose (B) Glucose and galactose (C) Galactose and mannose (D) Lactose and maltose
Last Answer : B
Description : The constituent unit of inulin is (A) Glucose (B) Fructose (C) Mannose (D) Galactose
Description : Sucrose consists of (A) Glucose + glucose (B) Glucose + fructose (C) Glucose + galactose (D) Glucose + mannose
Description : Plasticisers are added to synthetic plastics to (A) Impart flexibility (B) Improve workability during fabrication (C) Develop new improved properties not present in the original resins (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : All of the following monosaccharides give the same osazone except (a) Galactose (b) Glucose (c) Fructose (d) Mannose
Last Answer : Galactose
Description : Commercial Vaseline is derived from - (1) plant gums (2) coal tar (3) wool wax (4) petroleum
Last Answer : (4) petroleum Explanation: Vaseline is a brand of petroleum jelly based products owned by Anglo-Dutch company Unilever. While Vaseline can be used as a lubricant, it is also a ... insulator for local skin conditions characterized by tissue dehydration. Vaseline helps protect minor cuts and burns.
Description : Commercial Vaseline is derived from (1) plant gums (2) coal tar (3) wool wax (4) petroleum
Last Answer : petroleum
Description : Antiatherosclerotic effect of which class of hypolipidemic drugs may involve additional mechanisms like improved endothelial function, reduced LDL oxidation and antiinflammatory property: A. Bile acid sequestrant resins B. Statins C. Fibrates D. Nicotinic acid
Last Answer : B. Statins
Description : In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of (A) Cross linked polystyrene (B) Phenol formaldehyde resins (C) Polyesters (D) Polyamides
Last Answer : (A) Cross linked polystyrene
Description : The ease of adsorption of the hydrated alkali metal ions on ion-exchange resins follows the order:
Last Answer : The ease of adsorption of the hydrated alkali metal ions on ion-exchange resins follows the order: A. `K^(+)lt Na + ... (+)lt K^(+)lt Na^(+)lt Li^(+)`
Description : Plexiglass (also called Lucite) because of its high optical transparency is used for making lenses. It is chemically (A) Polymethyl methacrylate (PMMA) (B) Polytetrafluroethylene (PTFE) (C) Polycarbonates (D) Phenolic resins
Last Answer : (A) Polymethyl methacrylate (PMMA)
Description : Thermosetting resins/polymers as compared to thermoplastic ones are (A) Soluble in all organic solvents (B) More brittle (C) Formed by addition polymerisation only (D) Easily reshaped & reused
Last Answer : (B) More brittle
Description : A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved ... Siloxane elastomers (B) Polyamides (C) Vinyl polymers (D) Urea-formaldehyde resins
Last Answer : (D) Urea-formaldehyde resins
Description : Ion exchange resins are made of (A) Lucite (B) Sulphonated Bakelite (C) Polystyrene (D) Teflon
Last Answer : (B) Sulphonated Bakelite
Description : Non sulphonated hard bakelites are not used for making (A) Ion-exchange resins (B) Fountain pen barrels (C) Formica table tops (D) Combs
Last Answer : (A) Ion-exchange resins
Description : __________ are produced by reacting polybasic acid (e.g. Phthalic anhydride) with polyhydric alcohol (e.g., glycerol). (A) Unsaturated polyester (B) Alkyd resins (C) Saturated polyester (D) Amino resins
Last Answer : (B) Alkyd resins
Description : Amino resins are used in paper treatment to improve its (A) Wet tear and bursting strength (B) Folding endurance (C) Wet rub resistance (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Which of the following polymers belong to the class of formaldehyde resin? (A) Melamine resins (B) Teflon (C) Dacron (D) None of these
Last Answer : (A) Melamine resins
Description : Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. (A) Epoxy (B) Phenol formaldehyde (C) Urea formaldehyde (D) Melamine formaldehyde
Last Answer : (C) Urea formaldehyde
Description : Thermoplastic resins usually (A) Remain hard as long as they are hot (B) Cannot be reclaimed from waste (C) Permanent setting resins (D) Less brittle than thermosetting resins
Last Answer : (D) Less brittle than thermosetting resins
Description : Cation exchange resins used in water treatment is made from __________ resin. (A) Urea formaldehyde (B) Epoxy (C) Amino (D) Phenolic
Last Answer : (A) Urea formaldehyde
Description : Silicone resins, which are highly water repellent and has good heat resistance cannot be used (A) As room temperature adhesive (B) As grease & lubricant
Last Answer : (A) As room temperature adhesive
Description : __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine. (A) Epoxy (B) Amino (C) Alkyd (D) Phenolic
Last Answer : (B) Amino
Description : Thermosetting resins are those polymers, which (A) Do not increase in plasticity with rise in temperature (B) Allow slip to occur between molecules (C) Do not take on a permanent set (D) None of these
Last Answer : (A) Do not increase in plasticity with rise in temperature
Description : Thermoplastic resins are those polymers, which (A) Has decreased plasticity at increasing temperature (B) Cannot be moulded (C) Easily deform under pressure at high temperature (D) None of these
Last Answer : (C) Easily deform under pressure at high temperature
Description : Identify the incorrect statement. (a) Heartwood does not conduct water but gives mechanical support. (b) Sapwood is involved in conduction of water and minerals from root to leaf. (c) Sapwood is the innermost ... . (d) Due to deposition of tannins, resins, oils, etc., heartwood is dark in colour.
Last Answer : (c) Sapwood is the innermost secondary xylem and is lighter in colour
Description : Cyclic ethers with three-membered ring are called (a) Lactones (b) Oxiranes (c) Alkoxides (d) Epoxy resins
Last Answer : Oxiranes
Description : Which of the following is not a dielectric material? (A) Cotton, silk and paper (B) Asbestos, glass, porcelain and mica (C) Rubber and polymeric resins (D) All refractory materials
Last Answer : Option C
Description : Fibre reinforced plastic (FRP) are (A) Made of glass fibre and thermoplastic resins (B) Anisotropic (C) Made of thermosetting resin and glass fibre (D) Both 'b' & 'c'
Last Answer : Option D
Description : Pick up the correct statement from the following: (A) The plastic bottles are made by the process of blowing (B) The application of thermo-setting resins on sheets of paper, is called laminating ... placing raw material in the desired moulds, is known as moulding process (D) All the above
Last Answer : Answer: Option D
Description : Pick up the correct statement from the following: (A) Plastics have generally low melting point (B) The coefficient of thermal expansion of plastics is about three times than that of steel (C) ... fibre-glass with phenolic resins has absorption coefficient of about 0.67 (D) All the above
Description : In 3rd generation dentin bonding agents, HEMA (Hydroxyethylmethacrylate) is 1. a hydrophilic monomer that wets the dentinal surface 2. a hydrophilic resin that forms a hybrid layer by chemically reacting the intertubular dentin. 3. a hydrophilic ... a. 1,2 b. 1,4 c. 2,3 d. 1,3 e. 3,4
Last Answer : b. 1,4
Description : What happens to etched composite resins after setting: A. Expand B. Contract C. Contract and expand
Last Answer : B. Contract
Description : The effect of the temperature rising above 100ºC on heat-cured denture-base acrylic resins is: A. Produces porosity on the external portion of the resin. B. Produces porosity on the internal portion ... porosity on the surface of the resin. D. Prevents porosity on the interior of the resin
Last Answer : B. Produces porosity on the internal portion of the resin.
Description : What is an important requisite for fillers in dental composite restorative resins in load bearing areas: A. Sub micro sized particles B. High coefficient of thermal expansion C. High in content (High filler)
Last Answer : C. High in content (High filler)