1.aps-csb.in/OldQuestionPapers/PartB/PGT/Chemistry/2014.pdfThe solubility of AgCl in 0.1M NaCl...

0533333775792435 AWES PGT Chemistry

1. Chemistry The hydrolysis of tertiary butylchloride follows:-

o (a) Pseudo first order kinetics o (b) Zero order kinetics o (c) Second order kinetics

(d) First order kinetics

If choice d is selected set score to 1.

2. Chemistry Cu

2+ and Cd+

2 are detected in a mixture of their solutions by using:-

o (a) KCN and H2S

(b) HCl and H2S o (c) K3[Fe(CN)6] and H2S o (d) Conc. NH3 and H2S

If choice b is selected set score to 1.

3. Chemistry In the preparation of a standard solution of Mohr's salt, a few millilitres of H2SO4 is added to the solution. The added H2SO4:-

o (a) Neutralises the ammonia formed by hydrolysis

(b) Makes the solution homogeneous by converting insoluble Fe(OH)2 formed during hydrolysis, into soluble FeSO4

o (c) Prevents the oxidation of the salt o (d) Prevents the reduction of salt


4. Chemistry On being warmed with silver powder, Chloroform gives:-

o (a) CH3Cl

(b) C2H2 o (c) C6H6 o (d) C2H4



5. Chemistry Which of the following solutions are expected to be isotonic at the same temperature?

o (a) 0.1M urea and 0.2 M MgCl2

(b) 0.1 M Ca(NO3)2 and 0.1 M Na2SO4 o (c) 0.1 M urea and 0.1 M NaCl o (d) 0.1 M NaCl and 0.1 M Na2SO4


6. Chemistry Which of the following is a hexadentate ligand?

o (a) 2,2- (Dipyridyl) o (b) Ethylene diamine

(c) Ethylenediaminetetraacetate ion o (d) Biphenyl

If choice c is selected set score to 1.

7. Chemistry When the electron of a hydrogen atom jumps from n = 4 to n = 1, the number of spectral lines emitted is:-

o (a) 6

(b) 15 o (c) 4 o (d) 3


8. Chemistry The osmotic pressures of equimolar solutions of BaCl2, NaCl and C12H22O11 will be in the order:-

o (a) NaCl > BaCl2 > C12H22O11

(b) BaCl2 > NaCl > C12H22O o (c) C12H22O11 > NaCl > BaCl2 o (d) NaCl > C12H22O11 > BaC2l


9. Chemistry In spite of being an odd electron molecule, ClO2 does not di-merize because:-

o (a) The two Cl-O bonds do not have the same length

(b) The odd electron is delocalized


o (c) The odd electron is localized in the chlorine atom o (d) Due to pπ-pπ bonding in the chlorine atom


10. Chemistry Which of the following forms of phosphorus is most stable, least reactive, has a graphite like structure and is a good conductor of electricity?

o (a) White Phosphorus

(b) Black P o (c) Scarlet Phosphorus o (d) Red P


11. Chemistry Which is the most stable conformation for ethane?

o (a) Twist o (b) Boat

(c) Chair o (d) Staggard


12. Chemistry Which of the following is not linear?

o (a) IC3-

(b) I3+

o (c) IBrF-

o (d) I3-


13. Chemistry

Benzene diazonium chloride is made by diazotization and may be converted to by heating with:-

o (a) H2O o (b) H3PO2

(c) H2O and H3PO2 o (d) Conc. H2SO4



14. Chemistry Aniline on acetylation followed by bromination and subsequent hydrolysis gives:-

o (a) m-bromoacetanilide

(b) p- bromoaniline o (c) m- bromoaniline o (d) o-bromoaniline


15. Chemistry Among the following, which is the strongest nucleophile in the order of acidity for an SN2 reaction?

(a) RO- o (b) RCOO o (c) OH- o (d) H2O

If choice a is selected set score to 1.

16. Chemistry The nucleophilicities of R3C-, R2N-, RO- and F- decrease in the order:-

o (a) F -> RO -> R2N -> R3C-

(b) R3C -> R2N -> RO -> F- o (c) R3C -> RO -> F -> R3N- o (d) RO -> F -> R2N -> R3C-


17. Chemistry How many coulombs of electricity are required for reduction of 1 mol of MnO4 to Mn

2+?

o (a) 4.825 x 105C

o (b) 4.0825 x 105 C

o (c) 4.8 x 102 C

(d) 8.825 x 105C



18. Chemistry When a solution of a salt in dil. HNO3 is treated with an ammonium molybdate solution, a yellow ppt. is obtained, indicating the presence of:-

o (a) NO2-

(b) PO43-

o (c) AsO3

3-

o (d) SO3-


19. Chemistry The solubility of AgCl in 0.1M NaCl will:-

o (a) Increase o (b) Remain unchanged

(c) Decrease o (d) Become zero


20. Chemistry Consider a pure H2SO4 solution (98% by weight) having a specific gravity 1.8. The molarity of the H2SO4 is:-

o (a) 36 M o (b) 72 M

(c) 18 M o (d) 9 M


21. Chemistry A freshly prepared Fe(OH)3 ppt. is peptized by adding FeCl3 solution. The charge on colloidal particles is due to preferential adsorption of:-

o (a) Br - ion

o (b) Ba2+

ion o (c) OH

- ion

(d) Fe3+

ion



22. Chemistry The following sets of quantum numbers represent four electrons in an atom. (i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = 2 (iv) n = 3, l = 1 In this context, which of the following represents the correct order of increasing energy?

o (a) (ii) > (iv) > (i) > (iii) o (b) (iii) > (i) > (iv) > (ii) o (c) (i) > (iii) > (ii) > (iv)

(d) (iv) > (ii) > (iii) > (i)


23. Chemistry XeO2F2 has the structure:-

o (a) Tetrahedral o (b) Square Pyramidal

(c) TrigonalBipyramidal o (d) Octahedral


24. Chemistry In which of the following transitions will the wavelength be the minimum?

o (a) n = 2 to n = 1

(b) n = 3 to n = 1 o (c) n = 6 to n = 4 o (d) n = 4 to n = 2


25. Chemistry The mole fraction of a given sample of C- I2 in C6H6 is:-

o (a) 0.48

(b) 3.2 o (c) 0.032 o (d) 0.32



26. Chemistry Ferrocene is:-

o (a) bis( cyclopentyl) iron(II) o (b) dicyclopentadienyl iron(0)

(c) bis (cyclopentadienyl) iron (II) o (d) dicyclopentadienyl iron(III)


27. Chemistry Which among the following will produce a white ppt on reaction with AgNO3?

o (a) [Fe(en)3Cl3] o (b) [Co(NH3)6Cl3] o (c) K2[Pt(en)2Cl2]

(d) [Co(NH3)6]Cl3


28. Chemistry Rusting of Iron is:-

o (a) An electochemical process o (b) A photochemical process o (c) An elecroanalytical process

(d) All of the above


29. Chemistry The number of electrons gained and lost during the electrolysis of 35.5g of Cland 65.4g of Zn

2+

respectively are:-

o (a) 3.01 x 10 23

and 6.02 x 10 23

(b) 3.01 x 10 23

and 3.01 x 10 23

o (c) 6.02 x 10

23 and 3.01 x 10

23

o (d) 6.02 x 10 23

and 6.02 x 10 23


30. Chemistry Find the value of [ H

+ ] in 1L of solution in which 0.080 mol HC2H3O2 and 0.1mol of NaC2H3O2 are

dissolved.

o (a) 1.75 x 10-5


o (b) 1.2 x 10-5

o (c) 1.6 x 10

-5

(d) 1.4 x 10-5


31. Chemistry The conversion CH3CH=CHCHO → CH3CH=CHCH2OH can be achieved by using:-

o (a) H2-Ni o (b) LiAlH4 o (c) Fe/HCl

(d) NaBH4


32. Chemistry Given that the standard enthalpies of combustion of C(s), H2(g) and CH4(g) are respectively -393.5kJmole

-1, -285.8kJmole

-1 and -890.4 kJmole

-1 at 298 K. Calculate the standard enthalpy of

formation of methane (g).

o (a) -724.42 kJ mole-1

(b) -74.81 kJ mole-1

o (c) -114.82 kJ mole

-1

o (d) -194.62 kJ mole-1


33. Chemistry The products formed when an aqueous solution of NaBr is electrolyzed in a cell having inert electrodes are:-

o (a) H2 and O2 o (b) Na and Br2 o (c) Na and O2

(d) H2, Br2 and NaOH


34. Chemistry Based on the quantum theory, the electronic configuration of Pd (Z = 46) is:-

o (a) 4d8 5s

1

o (b) 4d9 5s

1

o (c) 4d10

5s2

(d) 4d 10



35. Chemistry Which of the following statements is incorrect?

o (a) Silicon is more electropositive than carbon o (b) Fluorosilicic acid, H2SiF6, known only in solution, is a strong acid o (c) The octahedral SiF6

2- ion is the only halogenocomplex of silicon

(d) Tetramethylsilane has the formula (CH3)3SiH4


36. Chemistry According to Huckel's rule, an aromatic compound has:-

(a) (4n + 2) π electrons o (b) (2n + 4) π electrons o (c) (4n + 2π) electrons o (d) (4π + 2n) electrons


37. Chemistry Very pure Silicon is an insulator, but becomes a p-type or an n-type semiconductor when doped with a:-

o (a) Group 1 and group 12 element respectively o (b) Group 12 and a group 16 respectively o (c) Group 4 and a group 5 element respectively

(d) Group 13 and a group 15 element respectively


38. Chemistry White phosphorus is more reactive than nitrogen because the:-

o (a) P-P-P bond angle is 120° whereas N2 is linear

(b) P-P bond in Phosphorus is weaker than N≡N bond in nitrogen o (c) Ionisation energy of phosphorus is greater thanthat of N2 o (d) Electronegativity of Phosphorus is low



39. Chemistry The solubility of a salt A2B3 is 1.0 x 10

-3 M. Its Solubility Product is:-

o (a) 1.08 x 10 -17

o (b) 1.08 x 10

-10

o (c) 1.08 x 10 -15

(d) 1.08 x 10 -13


40. Chemistry In the oxidation of alkenes with dilute KMnO4 solution followed by acidification with dilute H2SO4 to give diol, the OH groups come from:- CH2=CH2 + KMnO4 (acidified) → CH2OH-CH2OH

(a) KMnO4 o (b) H2O o (c) H2SO4 o (d) NaOH


41. Chemistry During the separation of Group IV metal ions as insoluble carbonates by the addition of a saturated solution of (NH4)2CO3 to the salt sample in an ammoniacal medium containing an excess of NH4Cl, magnesium is not precipitated either as Mg(OH)2 or MgCO3 because:-

(a) The concentrations of OH- and CO3

2- are so low due to the common ion effect that the ionic

product values of Mg(OH)2 and MgCO3 cannot exceed their respective solubility product values o (b) The solubility products of Mg(OH)2 and MgCO3 decrease due to common ion effect o (c) The solubility products of Mg(OH)2 and MgCO3 increase due to the common ion effect o (d) All of the above


42. Chemistry In the reaction 2CHCl3 + O2 gives 2COCl2 + 2HCl in the presence of X. X is:-

o (a) H2

(b) Light o (c) O2 o (d) Air



43. Chemistry m-dinitrobenzene can be converted to m-nitro aniline by reduction with:-

o (a) Na/C2H5OH o (b) (NH4)2S

(c) Raney nickel o (d) LiAlH4


44. Chemistry Silicones are a group of organosilicon polymers containing:-

o (a) Si-C-Si linkages o (b) C-Si-C linkages

(c) Si-O-Si linkages o (d) O-Si-O linkages


45. Chemistry What will be the equivalent weight of KBrO3 in the following ionic equation? 2BrO3

- + 12 H

+ + 10e

- → Br2 + 6 H2O

(a) M/10 o (b) M/6 o (c) M/5 o (d) M/4


46. Chemistry Which of the following has the largest degree of dissociation for a weak acid?

(a) 0.01 M o (b) 0.5 M o (c) 1.0 M o (d) 0.10 M


47. Chemistry Which among the following molecules has maximum number of P-H bonds?

(a) H3PO2


o (b) H3PO3 o (c) H4P2O5 o (d) H4P2O7


48. Chemistry In 1 L of 0.1 M solution 0.00135mol of NH3 dissociates. Calculate the equilibrium constant.

o (a) 1.60 x 10 -5

(b) 1.84 x 10 -5

o (c) 1.75 x 10

-5

o (d) 1.00 x 10 -5


49. Chemistry CCl4 is used in fire extinguishers under the name of:-

o (a) Phosphine

(b) Pyrene o (c) Phosgene o (d) None of the above


50. Chemistry Potassium metal crystallizes in a body centred cubic structure. The number of nearest neighbor atoms for each Potassium atom is:-

(a) Eight o (b) Six o (c) Twelve o (d) Four


51. Chemistry For the adsorption of a gas on a solid, the plot of log x/m versus log p is linear with slope equal to:-

(a) 1/n o (b) n o (c) k o (d) Log k



52. Chemistry If the concentration of the hydroxyl ions in the cell is doubled, the cell potential will:-

o (a) Become four times

(b) Become double o (c) Be reduced to half o (d) Remain unchanged


53. Chemistry Which of the following will not hydrolyze in an aqueous solution?

o (a) A salt of a weak acid and a weak base

(b) A salt of a strong acid and a strong base o (c) A salt of a strong acid and a weak base o (d) A salt of a weak acid and a strong base


54. Chemistry At STP, 0.48g of O2 diffuses through a porous pot in 1200 seconds. What volume of CO2 will diffuse in the same time and under the same conditions?

o (a) 224.8 ml o (b) 346.7 ml o (c) 112.2 ml

(d) 286.5 ml


55. Chemistry Which of the following reagents can be used to distinguish between Na2CO3 and NaNO3?

o (a) Bromine water

(b) Limewater o (c) H2SO4 solution o (d) Acidified K2Cr2O7 solution


56. Chemistry C2H5OH reacts with halogenacids in the presence of ZnCl2 to form C2H5X. Its reactivity with HI, HBr and HCl follows the order:-

o (a) HCl > HI > Hbr


o (b) HBr > HCl > HI

(c) HI > HBr > HCl o (d) HCl > HBr > HI


57. Chemistry What type of isomerism is exhibited by the compounds [CO(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] ?

o (a) Linkage isomerism o (b) Stereoisomerism

(c) Coordination isomerism o (d) None of the above


58. Chemistry The acidity of p-Nitrophenol(I), o-Nitrophenol(II), m-Nitrophenol (III) and Phenol(IV) decreases in the order:-

o (a) IV > III > II > I

(b) I > II > III > IV o (c) II > III > I > IV o (d) IV > I > II > III


59. Chemistry Consider the equation Z = PV/ RT. Which of the following statements is correct?

o (a) When Z > 1, real gases get compressed easily o (b) When Z = 1, real gases are difficult to compress o (c) When Z = 1, real gases get compressed easily

(d) When Z > 1, real gases are difficult to compress


60. Chemistry Calculate the equivalent weight of Na2CO3 when it is titrated against HCl in the presence of methyl orange.

o (a) 5.3 o (b) 106

(c) 53 o (d) 10.6



61. Chemistry In which of the following reactions is Kc<Kp?

o (a) CO(g) + Cl2 COCl2

o (b) CO(g) + 3H2(g) CH4(g) + H2O(g)

o (c) I2 (g) 2I(g)

(d) 2BrCl(g) Cl2(g) + Br2(g)


62. Chemistry Which of the following gases is adsorbed the most by activated charcoal?

o (a) Ne o (b) CH4

(c) CO2 o (d) Ar


63. Chemistry Among the following compounds, which has the maximum number of sp hybridized C atoms?

(a) C2H2 o (b) (CN)2 o (c) C6H6 o (d) CH = C = CH-CN


64. Chemistry When H2S is passed through an ammoniacal solution of a salt, a ppt. is obtained. The salt maybe a:-

o (a) Lead salt o (b) Copper salt

(c) Nickel salt o (d) Ammonium salt



65. Chemistry An aqueous solution of FeSO4.Al2(SO4)3.24H2O and chrome alum is heated with an excess of Na2O2 and filtered.

o (a) A yellow filtrate and a green residue appear o (b) A green filtrate and a brown residue appear

(c) A yellow filtrate and a brown residue appear o (d) A colourless filtrate and a green residue appear


66. Chemistry NiO adopts a rock salt structure. The coordination number of the Ni

2+ ion is:-

o (a) Two o (b) Twelve o (c) Four

(d) Six


67. Chemistry Which of the following ligands is chelating?

o (a) En o (b) Isothiocyanato o (c) Oxalato

(d) EDTA


68. Chemistry The dehydration of alcohols follows the order:-

o (a) 3°>1°>2°

(b) 3°>2°>1° o (c) 1°>2°>3° o (d) 2°>1°>3°


69. Chemistry Adsorption is accompanied by the evolution of heat. According to the Le Chatelier's principle, the amount of substance adsorbed should:-

o (a) Decrease with decrease in temperature


(b) Increase with decrease in temperature o (c) Decrease with increase in temperature o (d) Increase with increase in temperature


70. Chemistry When 20g of Naphthoic acid (C11H8O2) is dissolved in 50g of Benzene (K=1.72K kg mol

-1) a freezing

point depression of 2 K is observed. The Van't Hoff factor 'i' is:-

(a) 0.5 o (b) 1 o (c) 2 o (d) 3


71. Chemistry The hybridization state of the central atom of BrF3 and the shape of the molecule are respectively:-

o (a) sp3d

2, octahedral

o (b) sp3d, T-shaped

(c) sp3d

2, square pyramidal

o (d) sp3d

3, trigonalbipyramidal


72. Chemistry The IUPAC name of the compound CH3CH2COCl is:-

o (a) Propionyl chloride o (b) 1-Chloro-2-Keto ethane o (c) 2-Keto,1-Chloroethane

(d) Propanoyl chloride


73. Chemistry A sample of H2SO4 (density 1.8g ml -1) is 90% by weight. What is the volume of the acid that has to be used to make 1L of 0.2M H2SO4?

o (a) 16 ml

(b) 12 ml o (c) 18 ml o (d) 10 ml



74. Chemistry The appearance of colour in solid alkali metal halides is generally due to:-

o (a) Schottky defect

(b) F-centres o (c) Interstitial position o (d) Frenkel defect


75. Chemistry Nitrogen is unable to form pentahalides because of the:-

o (a) Presence of 2s and 2p orbitals o (b) Asence of 3p and 3d orbitals o (c) Absence of 3s, 3p and 3d orbital

(d) Absence of 3d orbitals


76. Chemistry How many isomers can CrCl3.6H2O have?

o (a) Two

(b) Three o (c) Six o (d) Four


77. Chemistry Which of the following is the strongest Ortho and Para directing group?

o (a) Cl o (b) Br o (c) C6H5

(d) OH


78. Chemistry When a reagent A reacts with Fe

3+ the solution turns red due to the formation of a compound B. The

reagent causes no change in colour when it reacts with Fe3+

in the pure state. A and B are respectively:-

(a) NH4CNS and [Fe(SCN)]2+


o (b) K3[Fe(CN)6] and K2Fe[Fe(CN)6] o (c) Na2HPO4 and FePO4 o (d) K4[Fe(CN)6] and Fe4 [Fe(CN)6]3


79. Chemistry Arrange NO2+, NO2 and NO2- in the order of increasing bond length:-

o (a) NO2+

< NO2- < NO2

o (b) NO2- < NO2

+ < NO2

o (c) NO2 < NO2- < NO2

+

(d) NO2+ < NO2 < NO2

-


80. Chemistry The azeotropic solutions of two miscible liquids:-

o (a) May not show positive or negative deviation from Raoult's law o (b) Can be separated by simple distillation o (c) Are unsaturated solutions

(d) Behave like a single component and boil at a constant temperature


81. Chemistry Which of the following changes occur when a solution containing Mn

2+and Cr

+3 is heated with NaOH

solution and H2O2?

o (a) Soluble MnO2 and a grey blue ppt of Cr(OH)2 are formed o (b) A grey blue gelatinous precipitate of Cr(OH)2 and a white precipitate of Mn(OH)2 is formed o (c) Mn(OH)2 and Cr(OH)2 precipitates which are formed initially dissolve due to the formation of

Na2MnO4 and Na2CrO4

(d) Soluble yellow Na2CrO4 and a brown precipitate of hydrated manganese dioxide are formed


82. Chemistry The oxidation number of C in HCOOH is:-

o (a) -4 o (b) -2

(c) + 2 o (d) 0



83. Chemistry The IUPAC name of the complex [Ni(C4H7O2N2)2] is:-

o (a) bis (2,3- butanedioldioximato) nickel (II) o (b) bis (methyl glyoxal) nickel (II)

(c) bis(2,3-butanedione dioximato) nickel (II) o (d) bis (dimethyl glyoxime) nickelate (II)


84. Chemistry Dehydration of conc. H2SO4 in the presence of P4O10 produces:-

o (a) SO2 o (b) H2S2O8 o (c) SO3 and SO2

(d) SO3


85. Chemistry Which of the following polymers are obtained by heating Caprolactum?

o (a) Nylon-66 o (b) Polyvinyl chloride

(c) Nylon-6 o (d) Teflon


86. Chemistry The structure of XeF6 is:-

(a) Distorted Octahedral o (b) Pyramidal o (c) TrigonalBipyramidal o (d) Square pyramidal


87. Chemistry Arylhalides are less reactive towards nucleophilic substitution than alkylhalides because:-

o (a) Of longer C-X bond o (b) Of the formation of less stable carbonium ion o (c) Of Inductive effect


(d) Of Resonance


88. Chemistry Select the correct option below:-

o (a) Agonists are drugs that both mimic the natural messenger as well as bind to the receptor site o (b) Antagonists are drugs that mimic the natural messenger

(c) Agonists are drugs that mimic the natural messenger by switching on the receptor and antagonists are drugs that bind to the receptor site and inhibit its natural function

o (d) Agonists are drugs that bind to the receptor site


89. Chemistry Dimethyl glyoxime is an example of a:-

(a) Bidentate ligand o (b) Tridentate ligand o (c) Monodentate ligand o (d) Hexadentate ligand


90. Chemistry The order of leaving ability of halides is:-

o (a) F -> Br -> I -> Cl- o (b) Br -> Cl -> F -> I- o (c) Cl -> Br -> I -> F-

(d) I -> Br -> Cl -> F-


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