Rajarshi Shahu Maharaj Polytechnic Chemistry 22102 PDF

Subject :- Basic Chemistry ( 22102) Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 1 of 33 Chapter Name of chapter Marks No. 4 CHEMICAL BONDI...

Subject :- Basic Chemistry ( 22102) Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 1 of 33 Chapter Name of chapter Marks No. 4 CHEMICAL BONDING AND CATALYSIS 09 METAL CORROSION,ITS PREVENTION AND 5 12 ELECTROCHEMISTRY PAINTS,VARNISHES,INSULATORS,POLYMERS,ADHSIVES 6 14 AND LUBRICANTS Total Marks :- 35 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 2 of 33  COURSE:- BASIC CHEMISTRY (22102) PROGRAMME: - ALL Syllabus:- Course Unit No. Name of the Unit Outcome (CO) 1 CHEMICAL BONDING AND CATALYSIS 102.4 METAL CORROSION ,ITS PREVENTION AND 2 102.5 ELECTROCHEMISTRY Course Q.1 Attempt all MCQ questions. Outcome First six questions 6*1= 6 Marks (CO) (g) & (h) questions 2*2= 4Marks a) Question on first chapter with four options 102.4 b) Question on first chapter with four options 102.4 c) Question on first chapter with four options 102.4 d) Question on second chapter with four options 102.5 e) Question on second chapter with four options 102.5 f) Question on second chapter with four options 102.5 g) Question on first chapter with four options 102.4 h) Question on second chapter with four options 102.5 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 3 of 33  COURSE:- BASIC CHEMISTRY (22102) PROGRAMME: - ALL CO.NO Course Outcome CO-102.4 Apply the catalysis process in industries. Use corrosion preventive measures in industry CO-102.5 CO-102.6 Use relevant engineering materials in industry. Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 4 of 33  Chapter No 04 Chemical Bonding & Catalysis ---------------------------------------------------------------------------------------------------------------------------------- Q.1) The loss & gain of electron from atom of element forms bond --------------------- (a) Covalent bond (b) Electrovalent bond (c) Co-Ordinate bond (d) Hydrogen bond Q.2) The arrangement of eight electron in outer most shell of an atom is ----------------- (a) Octet (b) Duplet (c) Triplet ( d) None Q.3) Electronic Configuration of Sodium (Na) ------------ (a) 2,8,2 (b) 2,6 (c) 2,8,8 (d) 2,4 Q.4) Ions posses charge which depends on loss & gain of --------------------------- (a) Neutron (b) Nucleons (c) Proton (d) Electron Q.5) The valency obetained by gain of valency electron is called as ----------- (a) Positive electrovalency (b) Covalency (c) Negative electrovalency (d) electrovalency Q.6) Electrovalent compounds generally have ------------------ (a) High Melting point (b) Low Melting point (c)No sharp Melting point (d) None of these Q.7) Which molecule is a polar molecule ? (a) N2 (b) Co2 (C) CH4 (d )H2o Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 5 of 33 Q. 8) Dative bond is the another name of-------------------------- (a) Ionic bond (b) Electrovalent bond (c) Covalent bond (d) Co-Ordinate bond Q.9) Which of the following is crystal solid? (a) Glass (b) Rubber (c) Plastic (d) Sodium Chloride Q.10) Non-metal atom borrows electron to from----------------------- (a) Positive (b) Anion (c)Cation (d) None of these Q.11) When only one atom provides the electron to form bond. (a) Covalent bond (b) Hydrogen bond (c) Ionic bond (d) Co-Ordinate bond Q.12) Metals having bright shiny surface , this property is called--------- (a) Metallic conduction (b) Castability (c) Forgeability (d) Metallic lustre Q.13) The noble gases such as helium,neon are------------------ (a) Diatomic (b) Triatomic (c) Monoatomic (d)Polyatomic Q.14) Repeatable entity of a crystal structure is known as-------------------- (a) Crystal (b) lattice (c) Unit cell (d) Miller indices Q.15) Which of the following is not a category of catalysis? (a) Homogeneous (b) Heterogeneous (c)Artificial (d) Enzymatic Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 6 of 33 Q.16) Very high bolling & melting points are of---------------------- (a) Covalent Compound (b) Ionic Compound (c) Metallic Compound (d) dative Compound Q. 17) The force of attraction that exist between non-polar molecules are---------------------- (a) Ionic bond ( b) Electrovalent bond (c) Covalent bond (d) Vander Waals forces Q.18) Load bearing capacity of metals is called------------------------ (a) Tensile strength (b) Castability (c) Forge ability (d) Metallic luster Q.19) Molecule which have permant dipole are known as----------------------- (a)Polar (b) Non-polar (c) Dipolar (d) Tripolar Q.(20) Co- ordination number of hexagonal close packing is -------------- (a)8 ( b) 4 (c) 12 (d) 6 Q.21) When a product acts as catalyst then it is called as------------------ - (a) Self catalyst (b) Positive catalyst (c) Auto catalyst (d) Negative catalyst Q.22) Ammonium ion or sulphur dioxide is formed by the bond. (a) Ionic bond (b) Electrovalent bond (c) Covalent bond (d) dative bond Q.23) the bond established between the two dissimilar atoms or ions due to electrostatic force of attraction which called-------- (a) Covalent bond (b) Electrovalent bond (c) Co-Ordinate bond (d) Hydrogen bond Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 7 of 33 Q.24) Neither ions nor electron are free to move in --------------------------- ( a) Liquids (b) Metals (c)Ionic solids (d)All of the above Q.25) A Catalyst cannot affects ------------------------------- (a) Product (b)Rate of reaction (c) Reactants (d) both (a) & (b) Q.26) A complete transfer of one or more electrons between atoms constituting in forming---- (a) Ionic bond ( b) Electrovalent bond ( c) Covalent bond (d) dative bond Q.27) Types of bond present in the MgO molecule. (a) Ionic bond (b) Electrovalent bond (c) Covalent bond (d) dative bond Q.28) Unit cell is the smallest building unit of ------------- (a) Crystals lattice (b) liquids (c) gases (d) None of these Q.29) The number of electron lost gained or shared by an atom to from bond is called as------- ( a) Atomic number (b) Valency (c ) Atomic mass number (d) None of these Q.30) Aqueous solution of ionic compound is---------- (a) Bad conductor of electricity (b) good conductor of electricity (c) Either (a) or(b) (d) None of these Q.31) Ionic bond formed between -------------------- (a)Metal & Metal (b)Metal & Non-Metal (c)Non-Metal & Non-Metal (d) Metal & Metalloids Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 8 of 33 Q. 32) Representation of bond by single, double, triple line is done in ----------- (a) Covalent bond ( b) Hydrogen bond (c) Ionic bond (d) Co-Ordinate bond Q.33) Nacl is an example of--------- (a) Ionic solid (b) Molecular solid (c) Covalent solid (d) Metallic solid Q.34) Electrovalent compound are generally ------------------ (a) Amorphous (b) Crystalline (c) Liquid (d) Gaseous Q.35) Aluminium & gold has crystal lattice. (a) Body centered cubic structure (b) Simple cubic structure (c) Face centered cubic structure (d) None of these Q.36) A molecule is formed by chemical bond when ----------------------- (a) Neutrons of combining atom participate (b) Protons of combining atom participate (c) Valence elecrons of combining atom participate (d) All of the above Q.37) Crystal lattice is actually ------------------- (a) arry of points (b)Lines of points (c)Sum of points (d) Triangles of points Q.38) Lattice energy is decreased when size of anion is----------------------- (a) Decreased (b) Increased (c) Remains same (d) No change Q.39) The substance which decrease the efficiency of a catalyst is known as ----------- (a) Positive catalyst (b) Auto catalyst (c ) Negative catalyst (d) Catalytic inhibitors Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 9 of 33 Q.40) Polythene & Polypropene formation is catalyzed by ------------- (a) Hydrogen (b) Iron (c) Ziegler natta catalyst (d) Peroxide catalyst Q.41) Which of the following is a polar covalent bond. (a) Ca—Cl (b) Cl—Cl (c) P—Cl (d) Si—Si Q.42) Nitrogen molecule is formed by mutual sharing of electron are -------- (a) Five (b) Three (c)Two (d) One Q.43) Point which shows position of atom in a crystal are called------------- ( a) Lattice points (b) Lattice lines (c)Lattice circles (d) Lattice arrangements Q.44) Co-Ordination number of face centered cubic close packing is (a) 4 (b) 12 (c) 8 (d) 6 Q.45) Electron sea exists in-------------- (a) Polar bonds (b)Ionic bonds (c) Covalent bonds (d) Metallic bonds Q.46) Physical properties of bonding are influced by bonding between----------- (a) Atom (b) Ions (c) Molecules (d) All of the above Q.47) Dative covalent bond is found in----------- (a) Ammonia (b) Ammonium Ion (c) Urea (d) Nitrogen Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 10 of 33 Q.48) Compound with identical crystal structure and analogous chemical formula are called— (a) Isomers (b)Isotones (c) Allotropes (d) Isomorphous Q.49) ---------Molecule does not have hydrogen bonding. (a) Benzene (b) Hydrogen Fluoride (c) Eowater (d) Liquid Ammonia Q.50) Substance which either increases or decrease rate of chemical reaction without any chemical change-------- (a) Catalyst ( b) Polymer (c) Rubber (d) Thermo Cole Q.51) The substance that reduced the effectiveness of a catalyst are called…………… (a)inhibitors ( b) Autocatalysis (c) Polymer (d) none of these Q.52) When a product acts as a catalyst then it is called as…………….. (a) Self catalysis ( b) Autocatalysis (c) Positive catalysis (d) none of these Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 11 of 33  Chapter No - 05 Metal Corrosion, its Prevention & Electrochemistry --------------------------------------------------------------------------------------------------------------- Q.1) Which film is more protective? (a) Porous (b) non-porous (c) volatile (d)none of the above Q.2)Which oxide film is non-protective? (a)stable porous (b)stable non-porous (c)volatile (d)both (a) & (b) Q.3)Corrosion is the example of…………. (a)Oxidation (b) reduction (c) electrolysis (d) erosion Q.4) The process of attaching a more reactive metal to an iron object that will act as an anode is called………. (a) cathodic protection (b) erosion protection (c) sacrificial protection (d) none of these Q.5) The corrosion of metal by galvanic cell action take place on account of the impurities ……………. (a) noble metal (b)less active metal (c) more active metal (d) none of these Q.6) The metal at the top of electrochemical series is…………. (a) most stable (b) more noble (c)less active (d)most active Q.7) When two dissimilar metals are electrically connected ,then more active metal become……… (a) Cathode & gets protected (b) Cathode & undergoes corrosion (c) Anode & gets protected (d) Anode & undergoes corrosion Q.8) During corrosion metal converts in to …………. (a) hydroxide (b)oxide (c) carbonates (d)all of the above Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 12 of 33 Q.9) When object is galvanized, what metal is used to protect the iron. (a) Aluminum (b) Copper (c) Nickel (d)Zinc Q.10) Corrosion of metal is reverse process of …………of metal. (a) Destruction (b) Extraction (c)Rusting (d) Galvanizing Q.11) Which of the following is intert to oxidation? (a) Cu (b) Fe (c) Steel (d) Pt Q.12) Ionization of an electrolyte increases on dilution ,till the complete ionization. (a) Sugar (b) Urea (c)Glucose (d) All of these Q.13) Zinc-Copper electrochemical cell is called ………….. (a) Concentration cell (b)Electrolytic cell (c)Daniel cell (d) Dry cell Q.14) Rusting is a special term,given to the corrosion of which metal. (a) zinc (b) copper (c) nikel (d) iron Q.15) Which of the is the weak electrolyte? (a) NaoH (b) KOH (c)Ca(OH)2 (d) Alky amines Q.16) Which is the most active metal ? (a) Au (b) Ag (c) Cu (d) pt Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 13 of 33 Q.17) One of the common sacrificial anodic metal is……… (a) Zinc (b) Magnesium (c) Copper (d) Titanium Q.18) Volatile oxide corrosion product of metal is…………. (a) Fe2O3 (b) MoO3 (c) Fe3O4 (d)FeO Q.19) Standard electrode potential of Zn2+/Zn is……. (a) -0.76V ( b) +0.76 (c) -2.76 (d) +2.76 Q.20) Standard electrode potential of hydrogen is… (a) 1.00V (b) 0.00V (c) 0.01V (d) 0.001V Q.21).Zn is more ……………..than Fe. (a) Electronegative (b) Corrosive (c)Electropositive (d) None of above Q.22) Which of the following metal forms unstable metal oxide………… (a) Cr (b) Na (c)Ag (d) Mo Q.23) Passivity is due to…………. (a) Suitable PH (b) Application of suitable EMF (c) Formation of adhering oxide film (d)All of these Q.24) Corrosion occurs with evolution of hydrogen in medium. (a) Neutral (b)Basic (c) Alkaline (d) Acidic Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 14 of 33 Q.25) Which of the following is a primary cell? (a)Alkaline cell (b)Laclanche cell (c)Both of them (d) None of them Q.26) Coating of Zn,Al & Cd on steel are…………… (a)Cathodic (b)Anodic (c)Not affecting (d)None of above Q.27) Oxygen absorption mechanism of metal is observed when corrosion medium is………….. (a) Acidic (b) Basic (c) Neutral (d) Basic & neutral Q.28) Metal at the bottom of galvanic series are ………….. (a) Most stable (b)Least stable (c) Most active (d) highly corroded Q.29) The substance which get highly ionized is called ………. (a) Weak electrolyte (b) Strong electrolyte (c) Both (d) None Q.30) The cell which cannot be recharged is………. (a)Secondary cell (b)Ni-Cd cell (c) fuel cell (d) primary cell Q.31) Which is strong electrolyte? (a) HCl (b) HNO3 (c) H2SO4 (d) All Q.32) 1 Faraday is……………. (a) 1 Coulomb (b) 1000 Coulomb (c) 5900 Coulomb (d) 96500 Coulomb Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 15 of 33 Q.33) Electro refining of metal is…………….. (a) purification of metal (b) extraction of metal (c)Fabrication of metal (d) metallurgy of metal Q.34.) The process in one metal is coated on another metal by electrolysis is known as……………. (a)Hot dipping ( b) Electroplating (c) Cementation (d)cladding Q.35) Coating of Tin on iron by hot dipping process is known as………….. (a) Sherardizing (b) colorizing ( c) Tinning (d) Galvanizing NUMERICALS Q.36.) A Current of 0.25 ampere while flowing for one hr.through a solution of copper shuphate deposited 0.2936 g.of copper find electrochemical equivalent & chemical equivalent of copper. (a) 0.00032622 & 31.48 g ( b) 0.0032622 & 314.8 g (c) 0.032622 & 31.48 g (d) 32.622 & 31.48 g Q.37.) Calculate the time in seconds in which 0.3 gm.of copper is lierated from copper suplphate solution.When current of 0.5 ampere is passed.(Eq.weight of cu-31.6g) (a) 1190sec b) 1199 sec. (c) 1196 sec. d) 1197sec. Q.38.) A current of 1.5 amperes was passed through a solution of a salt of a metal for 15 min. when 0.783 g of metal was deposited calculate the equivalent weight of metal. (a) 56.98g (b) 55.98 g (c) 0.058g (d) 5.8g Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 16 of 33 Q.39.) When electric current was passed through a solution of Silver nitrate for 45 min., 8.0 gm. of silver was deposited at cathode. Calculate the strength of the current. (E.C.E of Ag). (a) 2.53 amp. (b) 2.65amp. (c) 2.75amp (d) 26.5amp Q.40.) What a current strength in amp.will be requied to liberate 12.7 gm.of iodine from KI solution in 30 min. (a) 4.3amp. (b) 5.3amp. (c) 3.3amp. (d) 26.5amp Q.41.) A current of 1.5 amperes was passed through a solution of a salt of a metal for 15 min. when 0.783 g of metal was deposited calculate the equivalent weight of metal. (a) 0.0058g/c ( b) 0.00058g/c. (c) 0.058g/c (d) 5.8g/c Q.42.) Current of 5 amperes flowing for 0.5hr.deposited 3.048g of a metal at the cathode. Calculate the equivalent weight of metal.(1 Faraday =96500coulomb) (a) 32.68g (b) 3.268g (c) 0.3268g (d) 0.003268g Q.43.) Calculate the weight of metallic chromium deposited from a solution of chromium chloride by a current of 0.2ampere passing for 100 min. (At. wt. of Cr-52) (a) 2.255g (b) 0.2g ( c) 2.155g (d) 0.002155g Q.45.) A given quantity of electricity is passed through two cell containing copper sulphate & silver nitrate solution respectively. if 0.99 g of silver & 0.29 g of cooper are deposited, find the equivalent weight of silver when that of copper is 31.6 (a) 100g (b) 107.8g. (c) 1.078g (d) 0.1078g Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 17 of 33  Chapter No – 06 Paint, Varnishes, Insulators, Polymers & Monomers, Adhesives, Lubricants PAINTS AND VARNISHES Q.1) The main purpose of painting an iron grill is ………………. (a) to protect it from corrosion (b) to reduce its life and durability (c ) to decrease the weather resistance (d) to improve its beauty and appearance Q.2) A good paint must have………………………. (a) high covering power (b) brushing characteristics light (c ) reflecting property (d) all of the above Q.3) A paint of constitute of ……………………. (a) fillers (b) pigment (c ) gypsum (d) drying oil Q.4) A mixture of drying oil , resin and volatile solvent is known as ……………………… (a) polymer (b) plastic (c ) paint (d) varnish Q.5) The composition of paint that provides the hiding power is …………………….. (a) pigment (b) solvent (c ) vehicle (d) none of these Q.6) Varnish is used to give …………… (a) transparent finish (b) red colour finish (c ) opaque finish (d) fire resistant finish Q.7) White lead in paint acts as …………………………… (a) thinner (b) drying oil (c ) pigment (d) drier Q.8) Thinner are added to paint to ………………………………… (a) improve drying quality (b) reduce the cost (c ) reduce the consistency (d) provide water proofness Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 18 of 33 Q.9) A paint contains …………………………………. (a) pigment only (b) drying oil only (c ) pigment + drier only (d) all of these Q.10) Opacity and desired colour to paint are provided by ……………………………. (a) extenders (b) drier (c ) pigments (d) thinner Q.11) Spirit varnish is a solution of …………………………….. (a) oil + pigment (b) resin + pigment (c )resin + solvent (d) pigment + drier Q.12) A solution of shellac in alcohol is an example of …………………………….. (a) oil varnish (b) paint (c )spirit varnish (d) none of these Q.13) Both paint and oil varnish contain common constituent…………………………….. (a) thinner (b) pigment (c )drying oil (d) extender Q.14) Following is not a thinner …………………………………. (a) acetone (b) terpentine (c )spirit (d) castor oil Q.15) Varnish is a homogenous colloidal dispersion solution of ……………… in oil or thinner or in both. (a) pigment (b) resin (c )salt (d) gypsum INSULATORS Q.16) The materials which are used to prevent the flow of heat are known as ……………………… (a) insulators (b) conductors (c )semiconductors (d) paint Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 19 of 33 Q.17) Which one is not an insulating material ? (a) glass wool (b) thermocole (c )asbestos (d) iron Q.18) Glass wool and thermocole are used as an insulators in ………………………… (a) fridge and microwave oven (b) laptop (c )furnace (d)none of these Q.19) Which statement is true for insulators ? (a) they have high density and fire resistance (b) they have low density (c )they are not water proof (d) they are not electric proof Q.20) What materials would be safest to use as an insulators to cover electrical wires ? (a) aluminium (b) tin (c )rubber (d) water Q.21) Copper wire is often wrapped in plastic , plastic is a good ………………….. (a) electromagnet (b) insulators (c )conductors (d) circuit Q.22) A good thermal insulators should have ……………………………………. (a) high thermal conductivity (b) low thermal conductivity (c )high electrical conductivity (d) low electrical conductivity Q.23) Glass wool is made up of ……………………………… (a) ordinary wool (b) filaments of glass (c )filaments of mica (d) none of these Q.24) Thermocole is ……………………………… (a) monomer (b) polymer (c )plastic (d) both (b) and (c) Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 20 of 33 Q.25) Following is not a solid insulating material…………………………….. (a) porcelain (b) paper (c )silicon rubber (d) dry air Q.26) Insulators are classified on the basis of ……………………………………. (a) manufacturing (b) state of occurrence (c )application (d) all of the above POLYMERS AND MONOMERS Q.27) Plastics is a polymer formed by ……………………. (a) decantation (b) vulcanization (c )polymerization (d) evaporation Q.28) Which are the types of polymerization ? (a) addition & condensation (b) evaporation & addition (c ) condensation & malleability (d) none of the these Q.29) Structural unit of a high polymer are called…………………….. (a) fibers (b) monomers (c ) thermo units (d) fabrics Q.30) Phenol-formaldehyde resin is commercially known as ……………………………… (a) PVC (b) elastomer (c )teflon (d) bakelite Q.31) Bakelite is prepared by the condensation of ……………………………………. (a) benzene & formaldehyde (b) phenol & formaldehyde (c )phenol & acetaldehyde (d) phenol & chloroform Q.32) Phenol-formaldehyde is an example of ………………………………. (a) linear chain polymer (b) elastomer (c )cross-link polymer (d) all of the above Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 21 of 33 Q.33) Which one is a copolymer ? (a) nylon (b) teflon (c )PVC (d) polystrene Q.34) What is the repeating unit in Teflon ? (a) F2C = CF2 (b) H2C = CH2 (c ) H2C = CH.Cl (d) h2C = CH.C6H5 Q.35) Which one is not a thermoplastics ? (a) polyethylene (b) PVC (c ) bakelite (d) teflon Q.36) Tetrafluoroethylene is a the monomer of ……………………………. (a) Nylon 66 (b) Teflon (c ) PVC (d) Polyethylene Q.37) Which of the following polymers contain nitrogen ? (a) nylon (b) teflon (c )PVC (d) polyethylene Q.38) A polymer used mostly for forming textile fibres is ……………………………. (a) PVC (b) nylon (c ) bakelite (d) all of the above Q.39) Epoxy resin is an example of …………………………………….. (a) copolymer (b) monomer (c ) homopolymer (d) elastomer Q.40) Commercial name of epoxy resin is ………………………….. (a) alcohlol (b) araldite (c )ammonia (d) ebonite Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 22 of 33  ADHESIVES Q.41) Adhesive is a substance used …………………………………… (a) for sticking two unlike bodies together (b) for mixing metals and non - metals (c )for purification of water (d) for making alloy Q.42) An example of vegetable glue is …………………………….. (a) soybean glue (b) casein glue (c ) both (a) and (b) (d) none of the above Q.43) An example of inorganic adhsives is ………………………………. (a) casein (b) plexi glass (c )araldite (d) sodium silicate Q.44) Araldite is …………………………………. (a) vegetable glue (b) thermosetting resin (c ) thermoplastic resin (d) cellulose derivative Q.45) An example of natural adhesive used in stamps , envelops etc. is……………………… (a) starch (b) asphalt (c )araldite (d) wax Q.46) Adherends means ………………………………… (a) bodies held together by an adhesive (b) bonding which hold two bodies together (c ) substance used to stick two bodies (d) force between two bodies Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 23 of 33 Q.47) Which of the following is not a natural adhesive ? (a) asphalt (b) shellac (c ) soyabean (d) resin Q.48) Adhesive used for bonding metal is ……………………………….. (a) epoxy resin (b) silicone resin (c ) both of these (d) none of these Q.49) Which of the following give least adhesive strength ? (a) animal glue (b) starch (c ) epoxy resin (d) silicone resin Q.50) Adhesive used for bonding glass , metals , ceramics is ……………………… (a) animal glue (b) starch (c ) epoxy resin (d) sodium silicate LUBRICANT Q.51) Graphite is which type of lubricant ……………………… (a) Solid (b) semi-solid (c) semi-solid (d) gaseous Q.52) ) Lubricating helps to get……………………… (a) Minimize wear in moving parts ( b) helps in keeping the machine part cool ( c) washes away & carries away dirt,from machine parts (d) all of the Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 24 of 33  Q.53) Viscosity index is a measure bfor change of viscosity with chage in……… (a) pressure (b)volume (b) density (d)temperature Q.54) A liquid lubricant should possess high ……………. (a) volatity (b) oiliness (c) Acidity (d) cost Q.55) Grease is not used to lubricant………….. (a) Gears (b) bearings working at high temperature (c) Delicate instruments (d) none of these Q.56)Agood lubricant should have………. (a) moderate viscosity (b) low viscosity index (c) low acidity (d) all of these Q.57) Soap ,stone ,waxes ,talc are example are………… (a) solid lubricant (b)semi-solid lubricant (c)liquid lubricant (d) gaseous lubricants Q.58) Which one is a synthetic lubricant? (a) vegetable oil (b) mineral (c) animal oil (d) none of these Q.59) Which one is not a vegetable oil ? (a) tallow oil ( b)coconut oil (c) olive oil (d)palm oil Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 25 of 33 Q.60) Grease is prepared by saponification of……… (a)oil (b) fatty acids wiyh oil (c)soild lubricants (d)all of these Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 26 of 33 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 27 of 33 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 28 of 33 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 29 of 33 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 30 of 33 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 31 of 33 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 32 of 33 Prepared By: Prof.P.V.Patil & Prof.D.B.Mogal ( Department of Science and Humanity ) Page 33 of 33