1. Which of the following statements best describes what happens when chocolate melts?a) This is a physical change, and the molecules move farther apart.b) This is a chemical change, and the molecules move farther apart.c) This is a physical change, and the molecules move closer together.d) This is a chemical change, and the molecules move closer together.

2. Which of the following is not part of Daltons atomic theory?a) All matter is composed of indivisible atoms.b) Atoms of the same element can be different.c) Compounds form when atoms combine in whole number ratios.d) A chemical reaction involves rearrangement of atoms.

3. Which of the following pairs of compounds illustrates the law of multiple proportions?a) Fe, FeO3 b) Cl, Cl2 c) H2SO4, NaOH d) H2O, H2O2

4. Which of the following elements would you expect to behave most like magnesium?a) sodium b) calcium c) aluminum d) scandium

5. Which of the following has the longest wavelength?a) X rays b) microwaves c) green light d) UV light

6. Which of the following represents the correct formula of the compound formed by fluorineand aluminum?a) Al3F7 b) Al5F c) AlF3 Al7F3 d) Al7F3

7. Which of the following is an ionic compound?a) N2O b) CO c) HCl d) Na2O

8. What is the molar mass of acetaminophen, shown here?a) 151 g/mol b) 48 g/molc) 120 g/mol d) 132 g/mol

9. Which of the following is most likely to lose electrons in an ioniccompound?a) oxygen (O) b) hydrogen (H) c) lead (Pb) d) carbon (C)

10. Which of the following is the least active metal?a) aluminum b) gold c) iron d) magnesium

11. Which statement best describes the chemistry of soaps?a) They contain both a nonpolar group and a polar groupb) They contain only a nonpolar groupc) They contain only a charged groupd) They are highly polar, charged compounds12. Which of the following is not true about acid-base indicators?a) They act as sensors of H+ by changing color.b) They account for the fact that roses are red and violets are blue.c) They are found in pH paper.d) They form the basis of the Scott test for cocaine.13. Isomers are molecules with the samea) kinds and number of atoms but a different arrangement of these atomsb) number of electrons and protons but a different number of neutronsc) net dipole but different atoms involved in the bondd) molecular formula but a different overall charge

14. Which of the following elements has the greatest electronegativity?a) S b) He c) Fr d) Cl

15. Your friend is abroad this semester in London. She reports that the temperature there is 4C.You know that the conversion to Fahrenheit involves multiplying by 1.8 and adding 32F.What is the London temperature in Fahrenheit with the correct number of significant figures?a) 39.2F b) 39F c) 40F d) 4F16. The t-butyl carbocation is stabilised by hyperconjugation of the positive charge through the _________ orbitals.a) s/pb) p/pc) sp2/sp3 d) p/sp3

17. Which one of the following elements does not exist as a diatomic molecule in nature?a) hydrogen b) nitrogen c) fluorine d) neon

For questions 18. and 19., consider the following reaction:

4 Al (s) + 3 O2 (g) 2 Al2O3 (s)

18. The reaction can be classified as which one of the following types?a) precipitation b) decomposition c) synthesis d) double displacement

19. How many moles of Al2O3 can be produced from the reaction of 10.0 g of Al and 19.0 g of O2?a) 0.581 mol b) 0.371 molc) 0.185 mol d) 0.396 mol

20. What volume of 12.0 M HCl is required to make 75.0 mL of 3.50 M HCl?a) 21.9 mL b) 0.560 mL c) 257 mL d) 75.0 mL

For questions 21. and 22., consider the following heating curve of a hypothetical substance:

21. What is the boiling point of the substance?a) 0C c) 12Cb) 50C d) 75C

22. What state of matter is the substance at 50C?a) gas c) solidb) liquid d) not enough information

23. The metallurgical process in which a metal is obtained in a fused state is called

a ) smeltingb) roastingc) calcinationsd) froth floatation

24. The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure isa)Dalton's lawb)Gay Lussac's lawc)Henry's lawd)Raoult's law

25. The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things isa)heliumb)ozonec)oxygend)methane

26. The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen isa)2.05 gramb)3.05 gramc)4.05 gramd)5.05 gram

27. The octane number of zero is assigned toa)2-methyl octaneb)n-heptanec)iso-octaned)3-methyl octane

28. The metal that is used as a catalyst in the hydrogenation of oils isa)Nib)Pbc)Cud)Pt

29. The Latin word formica means ant. The name formic acid is derived from this Latin word becausea)this acid, in ancient times, was used to eliminate ant-hillsb)this corrosive acid is secreted by ants to drive away their enemiesc)this acid was first obtained by the distillation of antsd)ants are attracted by the odour of this acid

30. The monomer of polythene is

a)vinyl chlorideb)ethylenec)ethyl alcohold)None of the above

31. The luster of a metal is due toa)its high densityb)its high polishingc)its chemical inertnessd)presence of free electrons

32. The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature isa)1.568 x 103b)6.023 x 1019c)4.84 x 1017d)6.023 x 1023

33. The most malleable metal isa)platinumb)silverc)irond)gold

34. The oil used in the froth floatation process isa)coconut oilb)olive oilc)kerosene oild)pine oil

35. The mass of one Avogadro number of helium atom isa)1.00 gramb)4.00 gramc)8.00 gramd)4 x 6.02 x 1023 gram

36. The inexpensive and commonly used variety of glass is called soda glass. It is called so becausea)was used initially for making bottles of soda(carbonated drink)b)is made using soda(sodium carbonate)c)was initially used for storing sodium carbonated)is made using soda lime37. The graphite rods in the nuclear reactora)react with U to release energyb)produce neutronsc)undergo combustion which triggers the nuclear fissiond)convert fast moving neutrons into thermal neutrons

38. The first metal used by man wasa)ironb)copperc)goldd)bronze

39. The most electropositive elements among the following isa)Nab)Cac)Kd)Cs

40. The method that cannot be used for removing permanent hardness of water isa)adding sodium carbonateb)distillationc)adding caustic sodad)boiling

41. Zone refining is used for the purification ofa)Aub)Gec)Agd)Cu

42. The molecule which has the highest percentage of ionic character among the following isa)HIb)HFc)HCId)HBr

43. The iron ore magnetite consists ofA.Fe2O3B.Fe3OH4C.FeCO3D.3Fe2O3 .. 3H2O

44. The main chemical constituent of clay isa)silicon oxideb)aluminium borosilicatec)zeolitesd)aluminium silicate

45. The mineral containing both magnesium and calcium isa)magnesiteb)calcitec)carnallited)dolomite46. The metal does not give H2 on treatment with dilute HCL isa)Znb)Fec)Agd)Ca

47. The number of g-molecule of oxygen in 6.02 x 1024CO molecules isa)1 gram of moleculeb)0.5 gram of moleculec)5 gram of moleculed)10 gram of molecule

48. The maximum number of isomers for an alkene with molecular formula C4H8 isa)5b)4c)2d)3

49. The most important ore of aluminium is

a)bauxiteb)magnetitec)haematited)monazite

50. The hottest part of the gas flame is known asa)luminous zoneb)dark zonec)blue zoned)non-luminous zone

51. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI isa)chain isomerismb)functional group isomerismc)positional isomerismd)metamerism

52. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?a)1/6b)1/3c)1/8d)

53. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules ina)1.8 gram of H2Ob)12 moles of KMnO4c)0.6N H2SO4d)4.6 gram of C2H5OH

54. The mass number of an atom is equal toa)the number of protonsb)the number of protons and electronsc)the number of nucleonsd) the number of neutrons

55. The formula C6H5-CO-CH3 representsa)Acetoneb)Acetic acidc)Acetophenoned)Phenyl acetate

56. The metal that is usually extracted from sea water isa)Cab)Nac)Kd)Mg

57. The method of concentrating the ore which makes use of the difference in density between ore and impurities is calleda)liquationb)leachingC)levigationd)magnetic separation

58. The molecular formula of phosphorous isa)P1b)P2c)P3d)P4

59. Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.a)isothermalb)adiabaticc)isentropicd)none of these

60. Heating of water under atmospheric pressure is an __________ process.a)isochoricb)isobaricc)adiabaticd)isothermal

61. Van Laar equation deals with the activity co-efficients ina)binary solutionsb)ternary solutionsc)azeotropic mixture onlyd)none of these

62. High __________ is an undesirable property for a good refrigerant.a)specific heatb)latent heat of vaporisationc)viscosityd)specific vapor volume

63. The accentric factor of a materical, '', is defined as = -log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of accentric factor is alwaysa)> 2b)< 1c)> 1d)< 3

64. "Law of corresponding states" says thata) two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same.b)the surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature.c)no gas can be liquified above the critical temperature, howsoever high the pressure may be.d)the molar heat of energy of gas at constant volume should be nearly constant (about 3 calories).

65. Out of the following refrigeration cycles, which one has maximum COP ?a)Air cycleb)Carnot cyclec)Ordinary vapor compression cycled) Vapor compression with a reversible expansion engine66. Which of the following is a thermodynamic property of a system ?

a)Concentrationb)Massc)Temperatured)Entropy

67. Cement Kiln is aa)rotary Kilnb)tunnel Kilnc)natural draft furnaced)batch furnace

68. Which of the following is a heat treatment furnace ?a)Muffle furnaceb)Annealing furnacec)Reheating furnaced)Rotary kiln69. __________ atmosphere is maintained inside an iron blast furnace.

a)Oxidisingb)Reducingc)Inertd)Decarburising70. Which of the following is not a directly fired furnace ?

a)By-product coke ovenb)Calcination kilnc)Sintering furnaced)Open hearth furnace71. The product out from a cupola is calleda)wrought ironb)pig ironc)cast irond)none of these

72. If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantitya)is trebled.b)remains unchanged.c)decreases by a factor of 3.d)decreases by a factor of 1/3.

73. Corrosion of metals can not be prevented by itsa)temperingb)chromisingc)aluminisingd)alloying

74. Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5C).a)API = 200(G - 1)b)API = (141.5/G) - 131.5c)API = (140/G) - 130d)API = 145 - (145/G)

75. S.T.P. corresponds toa)1 atm. absolute pressure & 15.5C.b)760 mm Hg gauge pressure & 15.5C.c)760 torr & 0C.d)101.325 kPa gauge pressure & 15.5C.

76. Vapor pressure of water at 100C is about __________ bar.a)0.1013b)1.013c)10.13d)101.3

77. At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will bea)6b)8c)10d)12

78. Average molecular weight of air is abouta)21b)29c)23d)7979. 6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be __________ gm.a)0.5b)1b)3d)580. Pick out the wrong unit conversion of calorific value.a)1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg.b)1 BTU/ft3 = 8.9 kcal/m3 = 0.038 MJ/m3.c)1 BTU/lb = 2.3 kcal/kg.d)1 kcal/m3 = 0.1124 BTU/ft3.

81. 1 kgf/cm2 is not equal toa)1 torrb)l barc)10000 mm wcd)100 KPa = 100 N/m2

82. On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomesa)1b)8c)4d)283. The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfiesa)XM < 0.5b)XM = 0.5c)0.5 < XM < 0.64d)XM 0.6484. A very dilute solution is prepared by dissolving 'x1' mole of solute in 'x2' mole of a solvent. The mole fraction of solute is approximately equal toa)x1/x2b)x2/x1c)1 - (x1/x2)d)1/x2

85. A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that thea)atomic weight of the metal is 4.b)equivalent weight of the metal is 4.c)atomic weight of the metal is 2.d)equivalent weight of the metal is 8.86. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 CO2 + 2H2O. Both the reactants and products are in gas phase. H298 = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is abouta)0.19b)0.33c)0.40d)0.6787. Cp equals Cv at what temperature? Show your solutiona)0Cb)0Kc)0Fd)0R88. The boiling points for pure water and pure toluene are 100C and 110.6C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfiesa)0 < Xw < 0.5b)Xw = 0.5c)0.5 < Xw < 1.0d)Xw = 1.089. At standard conditions, N2 + 2O2 2NO2; G = 100 kJ/moleNO + O2 2NO2; G = -35 kJ/moleThe standard free energy of formation of NO in kJ/mole isa)15b)30c)85d)17090. 1 kg of calcium carbide (CaC2) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour ?a)5b)10c)15d)2091. A rigid vessel containing three moles of nitrogen gas at 30C is heated to 250C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.C and, Cv = 20.8 J/mole.C. The heat required, neglecting the heat capacity of the vessel, isa)13728 Jb)19206 Jc)4576 Jd)12712 J92. Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily ata)heat conservation.b)yield enhancement.c)product enrichment.d)none of these.93. The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg. ?a)0.2b)0.1c)0.4d)0.694. The reaction A + B C has been conducted in a reactor as shown below.

The number of balances (material) that can be made around the reactor area)1b)2c)3d)495. One kg of saturated steam at 100C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The amount of water vapour condensed (in kg) isa)0.0b)0.065c)0.1d)1.096. What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100C, if their vapor pressures at 100C are 1340, 560 and 210 mmHg respectively ?a)756.2b)780.5c)801.5d)880.597. An air-water vapour mixture has a dry bulb temperature of 60C and a dew point temperature of 40C. The total pressure is 101.3 kPa and the vapour pressure of water at 40C and 60C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air isa)0.048b)0.079c)0.122d)0.15298. Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10-3 kg mole/m2.s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m2 .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively isa)5.6 x 10-4b)8.5 x 10-4c)5.6 x 10-3d)8.5 x 10-3

99. If a1 and a2 are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.a)a1 = a2b)a1 = 2a2c)a1 = 0.5 a2d)none of these100. If the specific heats of a gas and a vapor are 0.2KJ/Kg.K and 1.5 KJ/Kg.K respectively, and the humidity is 0.01; the humid heat in KJ/Kg. isa)0.31b)0.107c)0.017d)0.215