124/2015

Maximum: 100 marks Time 1 hour and 15 minutes

1. The total number of atoms in 6 grams of water is


(A)6.02 x 1023


12.04 X 1023


(C)18.06 X 1023


3.01 X 1023


2. The percentage of an element M is 53 in its oxide of molecular formula M2O3. It's atomic mass is about:

36


27


18


23


3. The mass of oxygen required for the complete combustion of 2.5 grams of methane is

g


g


(C)1.5 g


g.


4. An organic compound with vapour density 28 on analysis gave 85.71% carbon and 14.29% hydrogen. Its molecular formula is

(A)C3H8


(B)C3H6


(C)C4H8


(D)C4H10


5. The enthalpy change for the reaction is called:


(A)enthalpy of transition


(B)enthalpy of atomization


(C)enthalpy of vaporization


(D)enthalpy of formation


6. Lattice energy is the amount of energy released:


(A)when one cation combines with one anion


(B)when one mole cations combines with one mole anion


(C)when one mole of ionic compound is formed from its cations and anions


(D)all of the above


7. Energy required to dissociate 4 grams of gaseous hydrogen into free gaseous atoms is 208 kcal at 25°C. The H-H bond energy will be


104 kcal


10.4 kcal


1040 kcal


1.04 kcal



8. The bond angles in molecules BeF2,SF6,CCl4 and NH3 are in the order:


(A)SF6 CCl4 NH3 BeF2


(B)SF6 NH3 CCl4 BeF2


(C)NH3 SF6 CCl4 BeF2


(D)NH3 CCl4 SF6 BeF2


9. The molarity of a solution obtained by mixing 50ml of 0.40M HCl and 50 ml of 0.20 M NaOH is


(A)0.20 M


(B)0.10 M


(C)0.01 M


(D)0.02 M


10. In XeF6 molecule, the hybridization of Xe atom is

sp3


sp3d


sp3d3


dsp2


11. Isopropyl bromide when treated with metallic sodium in ether gives:


(A)n-Hexane


2-Dimethyl propane


(C)2-Methyl pentane


(D)2,3-Dimethyl butane



12. The gas liberated at cathode during the electrolysis of sodium propionate is


(A)Hydrogen


(B)Carbon dioxide


(C)Ethane


(D)n-Butane


13. But-l-ene and 2 -Methyl propene illustrate


(A)Chain isomerism


(B)Position isomerism


(C)Metamerism


(D)Functional isomerism


14. Ozonolysis of 2-Methyl-2-butene gives:


(A)Acetone


(B)Acetaldehyde


(C)Glyoxal


(D)Acetone and Acetaldehyde


15. The pair which can be distinguished by ammoniacal cuprous chloride solution is


(A)But-1-yne and Ethyne


(B)But-l-yne and But-2-yne


(C)Propyne and Ethyne


(D)n-Butane and But-2-yne


16. The monomer of Orlon is


(A)CH2 CF2


(B)CF2 CF2


(C)CH2 CH-CN


(D)CH2 CR-Cl


17. Benzene when treated with phosgene in presence of AlClgives:


Benzaldehyde


Benzyl chloride


Benzophenone


Benzal chloride


18. Hydroxylation of Alkenes can be effected by


Reagent


(B)Baeyer's Reagent


(C)Tollens Reagent


(D)Borsche Reagent


19. Which of the following acids has the lowest pKa value?


(A)Acetic acid


(B)alpha -Chloro acetic acid


(C)alpha -Nitro aceti& acid


(D)alpha -Cyano acetic acid


20. The conversion of carboxylic acid in to primary amine by reaction with hydrazoic acid in presence of concentrated sulphuric acid is called:


(A)Schmidt Reaction


(B)Dakin Reaction


(C)Perkin Reaction


(D)Etard Reaction


21. Pyrolysis of calcium acetate gives:


(A)Formaldehyde


(B)Acetaldehyde


(C)Acetone


(D)Acetic acid


22. Wolff-Kishner Reduction of acetophenone gives:


(A)Toluene


(B)Ethyl Benzene


(C)Xylene


(D)Cumene


23. Which of the following compounds can give Butan-2-ol with CH3MgBr?





(B)CH3-CHO


(C)CH3-CH2-CHO


(D)CH3-CO-CH3



24. The product obtained when an aldoxime is treated with phosphorous pentoxide is


(A)Alkane


(B)Primary amine


(C)Nitrile


(D)Amide


25. The number of bridging hydrogen atoms in Diborane is















26. The half-life period of a radioactive element is 100 days. How long will it take for the decay of 15g out of 16


(A)200 days


(B)600 days


(C)300 days


(D)400 days


27. The pH of a solution obtained by mixing 50 ml of 0.40 N HCl and 50 ml of 0.20 N NaOH is

3


2


1


log2


28. Quantity of electricity in coulombs required to liberate 112 ml of H2 gas at N.T.P. is

(A)4825 C


(B)96500 C


(C)1930 C


(D)965 C


29. If x1 and x2 are the mole fractions of solvent and non-volatile solute and po and P are the vapour pressures of solvent and solution, then according to Raoult's law:


P po


po x1.P


p-po x1-x2


x1 X2


30. At extremely high pressure, the van der Waal's equation for 1 mole a real gas may be written as


PV =RT


PV=RT+P.b


PV=RT-P.b


RT


31. Potassium crystallizes with bcc lattice. The number of atoms in a unit cell is

1


8





2

32. In the Borax bead test, the colour of metaborate beads of copper is

Blue


Green


Pink


Red

33. The oxidation number of carbon in carbon suboxide is

2/3













34. Which of the following is not a bidentate ligand?


(A)Ethylene diammine


(B)1,10-Phenantroline


(C)Pyridine


(D)Glycinate ion


35. Which of the following isomeric alcohols has the highest boiling point?


(A)n-Butyl alcohol


(B)iso-Butyl alcohol


(C)sec-Butyl alcohol


(D)t-Butyl alcohol


36. The number of proton NMR signals for p-Nitro toluene is:














37. The carbon-carbon double bond stretching frequency will be highest in


(A)Cyelohexene


(B)1,3-Cyclohexadiene


(C)Benzene


(D)Same in all


38. The reagent which can reduce Nitrobenzene into Azobenzene is


(A)Zn/HCl


(B)Zn/NaOH (MeOH)


(C)Zn/NH4Cl


(D)Zn/NaOH


39. Amines can be estimated using a standard solution of:

(A)Sodium hydroxide


(B)Potassium permanganate


(C)Hydrochloric acid


(D)Sodium carbonate


40. Which of the following shows Carbyl amine Test:


(A)iso-Propyl amine


(B)Aniline


(C)o-Toluidine


All of the above


41. Picric acid is


(A)Trinitro benzene


(B)Trinitro toluene


(C)Trinitro phenol


(D)Tribromo phenol


42. The thermosetting plastic obtained by the polymerization reaction between phenol and formaldehyde is called:

(A)Bakelite


(B)Teflon


(C)Melamine


(D)None of the above


43. The condensation product of Chloroform with Acetone is

(A)Chloropicrin


(B)Chloretone


(C)Chloroprene


Chloroquine


44. Freon-112 is


(A)C2Cl4F2



(B)CCl2F2



(C)C2Cl2F4



(D)CClF3


45. The enzyme which converts starch into maltose is


(A)Zymase


(B)Invertase


(C)Diastase


(D)Maltase


46. Chlorination of benzene in presence of sunlight gives:

(A)Chloro benzene


(B)Hexachloro benzene


(C)Benzyl chloride


Benzene hexachloride


47. The heat evolved when 0.50 mole HCl is mixed with 0.20 mole NaOH solution will be:


(A)57.1 kJ


(B)14.3 kJ


(C)11.42 kJ


(D)1.14 kJ


48. The heats of formation of and CO2(g) are -26.4 kcal/mole and -94 kcal/mole respectively. The heat of combustion of CO will be


26.4 kcal


94 kcal


kcal


(D)-120.4 kcal


49. The Henderson equation for the pH of an acidic buffer solution is


pKa log


pKa log


pKa -log


pKa -log


50. In a process Delta H =100 kJ and delta S =100 J/K/mol at 400K. Then the value of delta G will be


(A)zero


(B)100 kJ


(C)50kJ


(D)60kJ


51. For a gaseous reaction delta E at 300 deg K is 20k cal. delta H for the reaction will be:

21.2 kcal


18.8 kcal


19.4 kcal


20 kcal


52. Which of the following conditions will always lead to a spontaneous change?


delta H and delta S


delta H and delta S +ve


delta H and delta S


delta H and delta S


53. During alpha-decay N/P ratio:


(A)Increases


(B)Decreases


(C)Remains constant


(D)May increase or decrease


54. A sample of rock contains equal number of Uranium and Lead 1/2 for U =4.5 x 109 years). Then the age of the rock would be


(A)4.5 x 109 years


(B)2.25 x 109 years


x 109 years


(D)13.5 x 109 years


55. The most abundant element on earth's crust is


Hydrogen


Silicon


Nitrogen


Oxygen


56. According to Bragg's equation, to get maximum intensity for first order reflection the· distance between the planes must be

lamda


lamda/2


2lamda


lamda


57. Which of the following nucleus has magic number of protons and neutrons?

2He4


20Ca41


50Sbl86


82Pb208


58. The number of particles emitted when 90Th232 changes to 82Pb208 is:


(A)4alpha,6beta


(B)6alpha,4beta


(C)6alpha,2beta


(D)8alpha,6beta


59. 87.5% of a decay process was completed in 36 minutes. When was 50% of the decay completed?


Minutes


Minutes


Minutes


Minutes


60. The amount of NaOH in grams required to prepare 1 liter of 0.01 M solution:

0.20


0.40





4


61. Which of the following species is not amphoteric?


HCO3­


HSO3-


HPO4-


HPO3-


62. The ratio of for the hypothetical reaction, 3B2(g) is:

RT





1/RT





63. 5 ampere current passed for 20 seconds deposit 0.0658 g of an ion whose atomic weight is

3

2

1

4


64. The Calomel electrode is







(C)Pt-Hg/Hg2Cl2-cl-





65. For a cell reaction, Mg2+(C Mg(s),the e.m.f has been found to be 0.2312 volts. Then the standard e.m.f of the cell is:


(A)0.2903 volts


(B)-0.2312 volts


(C)0.2607 volts


0.02312


66. 1g of pure calcium carbonate was found to require 50ml dilute HCl solution for complete reaction. The concentration of HCl solution is





(B)0.40N





(D)0.20N


67. Which of the following solution has osmotic pressure nearest to that of an equimolar solution of

C12H22O11


Al2(SO4)3


Na2SO4


Bacl2


68. The first order rate constant is related to temperature as log k =15-106/T. Which of the following pair of values is correct:

A=10 15 and E=1.9 X10 4kJ


A =10 15 and E =40 kJ


A =10 -15 and E =40 kJ


A =10 -15 and E =1.9 X 10 4 kJ


69. The volume of oxygen at N.T.P obtained from the decomposition of 1 liter 100 volume H2O2 is:


100liter


10liter


1liter


200liter


70. Permutit is the commercial name for:


Sodium calcium silicate


Calcium aluminium silicate


Sodium fluoro silicate


Sodium aluminium silicate


71. 0.10 mole of a carbohydrate with empirical formula CH2O contains 1g of hydrogen. Its molecular formula will be

C5H10O5


C6H12O6


C4H8O4


C3H6O3


72. Super oxides contain:

O2- ions


O2 2-ions


O2- ions


O-ions

73. The type of glass possessing low coefficient of thermal expansion is


Soda glass


Pyrex glass


Flint glass


Hard glass


74. Identify the fat-soluble vitamin:

Thiamine


Nicotinic acid·


Ascorbic acid


Galciferol


75. Xerophthalmia is caused by the deficiency of:


(A)Vitamin A


(B)Vitamin D


(C)Vitamin C


(D)Vitamin K


76. The number of degrees of freedom for the system in which ammonium chloride is in
equilibrium with ammonia and hydrogen chloride would be


(A)Zero


(B)One


(C)Two


(D)Three


77. The temperature at which two crystalline·forms are in equilibrium is called:

(A)Transition point


Melting ·point


(C)Eutectic point


(D)Triple point


78. Which of the following pair forms an ideal solution?


(A)Pyridine -Water


(B)Ethyl alcohol-Water


(C)Benzene -Acetic acid


(D)Benzene -Tolune



79. An example for a partially miscible liquid system with lower Critical Solution Temperature is:


(A)Phenol-Water


(B)Aniline-Water


(C)Aniline-Hexane


(D)Diethyl amine-Water


80. The heterocyclic ring system present in the alkaloid Quinine is

(A)Piperidine


Pyrolidine-Pyridine


(C)Quinoline


Isoquinoline


81. The reduction product of Citral with Na(Hg)/Alcohol is

(A)p-Cymene


Geraniol


(C)Geranic acid


Levulinic acid


82. The principal constituent of Turpentine oil is

(A)Camphor


Menthol


(C)alpha-Pinene


Zingiberene


83. Which of the following is a purine base present in nucleic acid?

(A)Thymine


(B)Cytosine


(C)Uracil


(D)Guanine


84. Lactose is a disaccharide made up of:

Glucose and Fructose


Two glucose units


Two galactose units


Glucose and Galactose

85. Arrange the following nucleophiles in the decreasing order of their nucleophilicity

NH3, C2H5-, NH2, C6H5-, NH2


NH2- NH3 C2H5-NH2 C6H5-NH2


NH2- C2H5-NH2 NH3 C6H5-NH2


NH2- NH3 C6H5-NH2 C2H5-NH2


NH2- C2H5-NH2 C6H5-NH2 NH3


86. SN1 mechanism operates in the hydrolysis of:


(A)t-Butyl chloride


(B)methyl chloride


(C)ethyl chloride


(D)iso-Propyl chloride


87. Temporary hardness of water is due to the presence of:


(A)Chlorides of Ca and Mg


(B)Bicarbonates of Ca and Mg


(C)Sulphates of Ca and Mg


(D)Nitrates of Ca and Mg


88. A sulphide ore of Iron is

(A)Magnetite


Haematite


(C)Limonite


Iron pyrites


89. The most covalent aluminium halide is

(A)Aluminium chloride


Aluminium bromide


(C)Aluminium fluoride


Aluminium iodide


90. The crystal system defined by a and alpha =beta not equal to 90 deg is called:


(A)Rhombohedral


Triclinic


(C)Orthorhombic


Tetragonal


91. For the reaction Product(s) when the concentration of A is doubled, the rate becomes 8 times. The order of the reaction is

4


1


3


2


92. The pH of a 1 x 10-5 M solution of NaOH is

5


9


7


12


93. Which of the following molecules has the largest RMS velocity?

H2S


NHs


CO2


SO2


94. Adsorption isobar is a plot of amount adsorbed against:


(A)Temperature


(B)1/temperature


(C)Pressure


(D)Volume


95. Smoke is a dispersion of:

(A)Solid in Gas


(B)Liquid in Gas


(C)Gas in Gas


Gas in Solid


96. Iodoform cannot be prepared from:


CH3CHO


CH3CH2OH


CH3OH


CH3CH(OH)CH3


97. Steel is heated to red hot and is rapidly cooled by dipping in water. This treatment is called:

Tempering


Anealing


Quenching


Hardening


98. Pure gold is


18 carat


22 carat


26 carat


24 carat


99. The flame colour of Lithium metal is

Yellow


Blue


Violet


Red


100. Iodine oxidizes thiosulphate ion to

Sulphite


Dithionate


Tetrathionate


Sulphate