karnataka cet chemistryâ2000
2000
KARNATAKA CET CHEMISTRY‐2000 www.vinuthetutor.com
KARNATAKA CET CHEMISTRY‐2000
1. Which of the following alkyl halide is used as a methylating agent? a. C2H5Cl b. CH3I c. C6H5Cl d. C2H5Br 2. H 2 + Cl2 ¾¾ ® 2 HCl , DH=194kJ . In this reaction heat of formation of HCl in kJ is a. 194 kJ b. 97 kJ c. +97 kJ d. +194 kJ 3. The strongest Bronsted base in the following anion is -
a. CIO2 b. CIO
-
-
c. CIO4 -
d. CIO3 4. By adding 20 ml 0.1 N HCl to 20 ml 0.001 NaOH, the pH of the obtained solution will be a. 7 b. 0 c. 1.3 d. 2 5. Which one of the following defects in the crystals lower its density? a. Schottky b. Frenkel defect c. Interstitial defect d. F centres 6. On heating sodium metal in a current of dry ammonia, the compound formed is a. Sodium hybride b. Sodium nitride c. Sodium azide d. Sodium amide 7. Number of molecules in one litre of water is close to
2
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KARNATAKA CET CHEMISTRY‐2000 a. 18 x 6.023 x10 23 b. 6.023/23.4 x10 23 c. 55.5 x 6.023 x10 23 d. 18 /6.023 x10 23 8. Phenol is heated with pthalic anhydride in presence of conc. H2SO4. The product gives pink color with alkali. The product is a. Fluorescein b. Slicylci acid c. Bakilite d. Phenolphthalein 9. The nitride ion in lithium nitride is composed of a. 10 protons + 7 electrons b. 7 protons + 7 electrons c. 10 protons + 10 electrons d. 7 protons + 10 electrons 10. Froth floatation process is used for the metallurgy of a. Sulphide ores b. Oxide ores c. Amalgams d. Chloride ores 11. Hydrolytic reaction of fats with caustic soda is known as a. Saponification b. Esterificaton c. Carboxylation d. Acetylation 12. Which of the following contains both covalent and ionic bond? a. CaCl2 b. CCl4 c. H2O d. NH4Cl 13. Which of the following molecule has the largest root mean square velocity at 25 o C? a. NH3 b. H2S c. SO2 d. CO2
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KARNATAKA CET CHEMISTRY‐2000 14. In the synthesis of ammonia N 2 ( g ) + 3H 2 ( g ) ¾¾ ® 2 NH 3 ( g ) . When 100 ml of N2 have reacted the volume of H2 which has also reacted and ammonia produced are a. 100 ml H2 and 200 ml NH3 b. 100 ml H2 and 100 ml NH3 c. 300 ml H2 and 300 ml NH3 d. 300 ml H2 and 200 ml NH3 15. At 490 o C, the equilibrium constant for the synthesis of HI is 50, the value of K for the dissociation of HI will be a. 0.02 b. 0.2 c. 2.0 d. 20.0 16. Matte contains mainly a. Cu2s b. Fe c. CuS and Fe2S3 d. Cu2S and FeS 17. The limiting radius ratio for tetrahedral shape is a. 0.155 to 0.225 b. 0 to 0.155 c. 0.414 to 0.732 d. 0.225 to 0.414 18. The calorific value is maximum in the case of a. Proteins b. Carbohydrates c. Minerals d. Milk 19. NH3 and BF3 form and adduct readily because they form a. A covalent bond b. An ionic bond c. A hydrogen bond d. A coordinate bond 20. Aluminium chloride is a/an a. Lewis base b. Lewis acid
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KARNATAKA CET CHEMISTRY‐2000 c. Arrhenius acid d. BronsteadLowry acid 21. Bleaching powder lost its power on keeping for a long time because a. It changes into calcium chloride and calcium chlorate b. It absorbs moisture c. It changes into calcium chloride and calcium hydroxide d. It changes into calcium hypochlorate 22. The fatty acid that shows reducing property is a. Formic acid b. Oxalic acid c. Ethanoic acid d. Acetic acid 23. In Nessler’s reagent the ion present is a. Hg ++ b. Hg + c. [HgI4] 2 d. [HgI4] 2 24. When ethanol is heated with Fehling’s solution it gives a precipitate of a. Cu2O b. Cu c. Cu2O+CuO d. CuO 25. The number of Pibonds in CH 2 =CHCH=CHC º CH is a. 3 b. 4 c. 5 d. 2 26. Hydrogen bonding is maximum in a. Diethyl ether b. Ethanol c. Triethyl amine d. Ethyl chloride 27. In a face centred cubic cell, an atom at the face contribute to the unit cell a. ½ part b. 1 part
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KARNATAKA CET CHEMISTRY‐2000 c. 1/8 part d. ¼ part 28. A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 g of the isotope in the container. The initial weight of the isotope when packed was a. 24 g b. 12 g c. 48 g d. 36 g 29. 10 litres of solution of urea contains 240 g urea. The active mass of urea will be a. 0.2 b. 0.4 c. 0.02 d. 0.04 30. Stainless steel contains a. Fe+Ni+Cu b. Fe+Cr+Ni c. Fe+C+Ni d. Fe+Cr+Cu 31. Flux is used to a. Remove silica and undesirable metal oxide b. Remvove silica c. Reduce metal oxide d. Remove all impurities from ores -
-
32. The brown ring test for NO2 and NO3 is due to the formation of complex ion with the formula 2 +
a. [ Fe( H 2O )( NO )5 ] 2 +
b. [ Fe( H 2O )5 NO ]
2 +
c. [ Fe( NO )(CN ) 5 ] 2 +
d. [ Fe( H 2O ) 6 ]
33. The number of unpaired electrons in Fe3+ (Z=26) are a. 4 b. 3
6
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KARNATAKA CET CHEMISTRY‐2000 c. 6 d. 5 34. The name of the product obtained by the addition of HI to propene in presence of peroxide catalyst a. 1iodopropane b. 2iodopropane c. 2iodopropene d. Propyl iodide 35. Amino acids usually exist in the form of Zwitter ions. This means that it consists of a. No acidic or basic group b. The basic group –COO and the acidic group –NH3 + c. The basic group –NH3 + and the acidic group –COO d. The basic –NH2 and the acidic group –COOH 36. Helium atom is two times heavier than a hydrogen molecule at 298 K. the average kinetic energy of helium is a. Same as that of a hydrogen molecule b. Two times that of hydrogen molecule c. Four times that of hydrogen molecule d. Four times that of hydrogen molecule 37. In the below reaction X stand for
a. Cl b. NH2 c. CH + 3Cl d. SnCl2 38. For which of the following reactions are the numerical values of Kp and Kc the same a. N 2 ( g ) + 3H 2 ® 2 NH 3 ( g ) b. 2 NOCl ( g ) ƒ 2 NO( g ) + Cl2 ( g ) c. H 2 ( g ) + I 2 ( s ) ® 2 HI ( g ) d. H 2 ( g ) + Cl2 ® 2 HCl ( g )
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KARNATAKA CET CHEMISTRY‐2000 39. When potassium ferrocyanide crustals are heated with concentrated sulphuric acid the gas evolved is a. Carbon monoxide b. Carbon dioxide c. Ammonia d. Sulphur dioxide H
40. The IUPAC name of
C4 H 9
| CH 3
- CH 2
-
C
-
C
|
|
CH 3
CH 3
- CH 3
a. 2 ethyl 3, 3dimethyl heptanes b. 2 butyl2methyl3ethyl butane c. 3,4,4trimethyl octane d. 3,4,4trimethyl heptanes 41. Cuprous ion is colourless while cupric ion is coloured because a. Cuprous ion has a complete dorbital and cupric ion has an incomplete d orbital b. Both have unpaired electrons in the dorbitals c. Cuprous ion has incomplete dorbital and cupric ion has a completed d orbitals d. Both have half filled p and dorbitals 42. Which of the following reagents is used to distinguish ethane from ethyne? a. Alkaline KMnO4 b. Bromine water c. Ammonical Cu2Cl2 d. Bromine in CCl4 43. Which of the following does not reduce Benedict’s solution a. Fructose b. Glucose c. Aldehyde d. Sucrose 44. The normality of 2.3 M H2SO4 solution is a. 0.23 N b. 0.46 N c. 4.6 N
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KARNATAKA CET CHEMISTRY‐2000 d. 2.3 N 45. Which of the following alkali metal ions has lowest ionic mobility in aquesous solution a. Na + b. Li + c. Cs + d. Rb + 46. A reaction that is of the first order with respect to reactant A has a rate constant 6 min 1 . If we start with [A] = 0.5 mol L 1 when would [A] reach the value 0.05 mol 1 L 1
? a. 3.84 min b. 3 min c. 0.15 min d. 0.384 min
47. For the process, dry iceà CO2(g) a.
DH is negative while DS is positive
b. Both DH
and DS are positive
c. Both DH and DS are negative d. DH is positive while DS
is negative
48. Which of the following is not used in FriedelCrafts reaction a. Chlorobenzene b. Benzene c. Bromobenzene d. Phenyl acetanilide 49. The pKa of a certain weak acid is 4.0. What should be the [Salt] to [Acid] ratio if we have to prepare a buffer with pH=5 using the acid and one of the salts? a. 5:4 b. 4:5 c. 1:10 d. 10:1 50. If formaldehyde and KOH are heated then we get a. Acetylene b. Ethyl formate c. Methyl alcohol d. Methane
9
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KARNATAKA CET CHEMISTRY‐2000 51. When 9.65 coulombs of electricity is passed through a solution of silver nitrate (atomic mass of Ag= 108.0 g mol 1 ). The amount of silver deposited is a. 6.4 mg b. 10.8 mg c. 21.2 mg d. 16.2 mg 52. Which of the following has lowest percentage of carbon a. Wrought iron b. Cast iron c. All have same percentage d. Steel 53. Brass in an alloy of a. Cu and Zn b. Ni and Zn c. Cu and Al d. Al and Zn 54. A certain compound gives negative test with ninhydrin and positive test with Benedicts solution, it is a. A protein b. A lipid c. A monosaccharide d. An amino acid 55. Which of the following can cause coagulation of proteins? a. Ca ++ b. Mg ++ c. Na ++ d. AG + 56. Solution of sodium metal in liquid ammonia is strongly reducing due to the presence in the solution of the following: a. Solvated electrons b. Sodium atoms c. Sodium amide d. Sodium hydride
10
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KARNATAKA CET CHEMISTRY‐2000 57. A reaction is A+BàC+D initially. We start with equal concentration of A and B. At equilibrium we find the moles of C is two times of a. What is the equilibrium constant of the reaction? a. 2 b. 4 c. ½ d. ¼ 58. One mole of an ideal gas is allowed to expand reversibly and adiabatically form a temperature of 27 o C. If the work done during the process is 3kJ, the final temperature will be equal to (Cv=20Jk1) a. 295 K b. 26.85 oC c. 100 K d. 150 K 59. Unpleasant smelling carbylamines are formed by heating alkali and chloroform with a. Any primary amine b. Any amine c. Any aromatic amine d. Any aliphatic amine 60. H 2 ( g ) + Cl2 ( g ) ® 2 HCl ( g ); DH = - 44 K . cal
2 Na ( s ) + 2 HCl ( g ) ® 2 NaCl ( s ) + H 2( g ); DH = -152 K . cal For the reaction Na ( s ) +
1 Cl2 ( g ) ® NaCl ( s ); DH = ? 2
a. 54 K Cal b. 98 K.Cal c. 196 K.cal d. 108 K cal
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KARNATAKA CET CHEMISTRY‐2000 www.vinuthetutor.com
KARNATAKA CET CHEMISTRY‐2000
1. Which of the following alkyl halide is used as a methylating agent? a. C2H5Cl b. CH3I c. C6H5Cl d. C2H5Br 2. H 2 + Cl2 ¾¾ ® 2 HCl , DH=194kJ . In this reaction heat of formation of HCl in kJ is a. 194 kJ b. 97 kJ c. +97 kJ d. +194 kJ 3. The strongest Bronsted base in the following anion is -
a. CIO2 b. CIO
-
-
c. CIO4 -
d. CIO3 4. By adding 20 ml 0.1 N HCl to 20 ml 0.001 NaOH, the pH of the obtained solution will be a. 7 b. 0 c. 1.3 d. 2 5. Which one of the following defects in the crystals lower its density? a. Schottky b. Frenkel defect c. Interstitial defect d. F centres 6. On heating sodium metal in a current of dry ammonia, the compound formed is a. Sodium hybride b. Sodium nitride c. Sodium azide d. Sodium amide 7. Number of molecules in one litre of water is close to
2
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KARNATAKA CET CHEMISTRY‐2000 a. 18 x 6.023 x10 23 b. 6.023/23.4 x10 23 c. 55.5 x 6.023 x10 23 d. 18 /6.023 x10 23 8. Phenol is heated with pthalic anhydride in presence of conc. H2SO4. The product gives pink color with alkali. The product is a. Fluorescein b. Slicylci acid c. Bakilite d. Phenolphthalein 9. The nitride ion in lithium nitride is composed of a. 10 protons + 7 electrons b. 7 protons + 7 electrons c. 10 protons + 10 electrons d. 7 protons + 10 electrons 10. Froth floatation process is used for the metallurgy of a. Sulphide ores b. Oxide ores c. Amalgams d. Chloride ores 11. Hydrolytic reaction of fats with caustic soda is known as a. Saponification b. Esterificaton c. Carboxylation d. Acetylation 12. Which of the following contains both covalent and ionic bond? a. CaCl2 b. CCl4 c. H2O d. NH4Cl 13. Which of the following molecule has the largest root mean square velocity at 25 o C? a. NH3 b. H2S c. SO2 d. CO2
3
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KARNATAKA CET CHEMISTRY‐2000 14. In the synthesis of ammonia N 2 ( g ) + 3H 2 ( g ) ¾¾ ® 2 NH 3 ( g ) . When 100 ml of N2 have reacted the volume of H2 which has also reacted and ammonia produced are a. 100 ml H2 and 200 ml NH3 b. 100 ml H2 and 100 ml NH3 c. 300 ml H2 and 300 ml NH3 d. 300 ml H2 and 200 ml NH3 15. At 490 o C, the equilibrium constant for the synthesis of HI is 50, the value of K for the dissociation of HI will be a. 0.02 b. 0.2 c. 2.0 d. 20.0 16. Matte contains mainly a. Cu2s b. Fe c. CuS and Fe2S3 d. Cu2S and FeS 17. The limiting radius ratio for tetrahedral shape is a. 0.155 to 0.225 b. 0 to 0.155 c. 0.414 to 0.732 d. 0.225 to 0.414 18. The calorific value is maximum in the case of a. Proteins b. Carbohydrates c. Minerals d. Milk 19. NH3 and BF3 form and adduct readily because they form a. A covalent bond b. An ionic bond c. A hydrogen bond d. A coordinate bond 20. Aluminium chloride is a/an a. Lewis base b. Lewis acid
4
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KARNATAKA CET CHEMISTRY‐2000 c. Arrhenius acid d. BronsteadLowry acid 21. Bleaching powder lost its power on keeping for a long time because a. It changes into calcium chloride and calcium chlorate b. It absorbs moisture c. It changes into calcium chloride and calcium hydroxide d. It changes into calcium hypochlorate 22. The fatty acid that shows reducing property is a. Formic acid b. Oxalic acid c. Ethanoic acid d. Acetic acid 23. In Nessler’s reagent the ion present is a. Hg ++ b. Hg + c. [HgI4] 2 d. [HgI4] 2 24. When ethanol is heated with Fehling’s solution it gives a precipitate of a. Cu2O b. Cu c. Cu2O+CuO d. CuO 25. The number of Pibonds in CH 2 =CHCH=CHC º CH is a. 3 b. 4 c. 5 d. 2 26. Hydrogen bonding is maximum in a. Diethyl ether b. Ethanol c. Triethyl amine d. Ethyl chloride 27. In a face centred cubic cell, an atom at the face contribute to the unit cell a. ½ part b. 1 part
5
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KARNATAKA CET CHEMISTRY‐2000 c. 1/8 part d. ¼ part 28. A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 g of the isotope in the container. The initial weight of the isotope when packed was a. 24 g b. 12 g c. 48 g d. 36 g 29. 10 litres of solution of urea contains 240 g urea. The active mass of urea will be a. 0.2 b. 0.4 c. 0.02 d. 0.04 30. Stainless steel contains a. Fe+Ni+Cu b. Fe+Cr+Ni c. Fe+C+Ni d. Fe+Cr+Cu 31. Flux is used to a. Remove silica and undesirable metal oxide b. Remvove silica c. Reduce metal oxide d. Remove all impurities from ores -
-
32. The brown ring test for NO2 and NO3 is due to the formation of complex ion with the formula 2 +
a. [ Fe( H 2O )( NO )5 ] 2 +
b. [ Fe( H 2O )5 NO ]
2 +
c. [ Fe( NO )(CN ) 5 ] 2 +
d. [ Fe( H 2O ) 6 ]
33. The number of unpaired electrons in Fe3+ (Z=26) are a. 4 b. 3
6
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KARNATAKA CET CHEMISTRY‐2000 c. 6 d. 5 34. The name of the product obtained by the addition of HI to propene in presence of peroxide catalyst a. 1iodopropane b. 2iodopropane c. 2iodopropene d. Propyl iodide 35. Amino acids usually exist in the form of Zwitter ions. This means that it consists of a. No acidic or basic group b. The basic group –COO and the acidic group –NH3 + c. The basic group –NH3 + and the acidic group –COO d. The basic –NH2 and the acidic group –COOH 36. Helium atom is two times heavier than a hydrogen molecule at 298 K. the average kinetic energy of helium is a. Same as that of a hydrogen molecule b. Two times that of hydrogen molecule c. Four times that of hydrogen molecule d. Four times that of hydrogen molecule 37. In the below reaction X stand for
a. Cl b. NH2 c. CH + 3Cl d. SnCl2 38. For which of the following reactions are the numerical values of Kp and Kc the same a. N 2 ( g ) + 3H 2 ® 2 NH 3 ( g ) b. 2 NOCl ( g ) ƒ 2 NO( g ) + Cl2 ( g ) c. H 2 ( g ) + I 2 ( s ) ® 2 HI ( g ) d. H 2 ( g ) + Cl2 ® 2 HCl ( g )
7
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KARNATAKA CET CHEMISTRY‐2000 39. When potassium ferrocyanide crustals are heated with concentrated sulphuric acid the gas evolved is a. Carbon monoxide b. Carbon dioxide c. Ammonia d. Sulphur dioxide H
40. The IUPAC name of
C4 H 9
| CH 3
- CH 2
-
C
-
C
|
|
CH 3
CH 3
- CH 3
a. 2 ethyl 3, 3dimethyl heptanes b. 2 butyl2methyl3ethyl butane c. 3,4,4trimethyl octane d. 3,4,4trimethyl heptanes 41. Cuprous ion is colourless while cupric ion is coloured because a. Cuprous ion has a complete dorbital and cupric ion has an incomplete d orbital b. Both have unpaired electrons in the dorbitals c. Cuprous ion has incomplete dorbital and cupric ion has a completed d orbitals d. Both have half filled p and dorbitals 42. Which of the following reagents is used to distinguish ethane from ethyne? a. Alkaline KMnO4 b. Bromine water c. Ammonical Cu2Cl2 d. Bromine in CCl4 43. Which of the following does not reduce Benedict’s solution a. Fructose b. Glucose c. Aldehyde d. Sucrose 44. The normality of 2.3 M H2SO4 solution is a. 0.23 N b. 0.46 N c. 4.6 N
8
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KARNATAKA CET CHEMISTRY‐2000 d. 2.3 N 45. Which of the following alkali metal ions has lowest ionic mobility in aquesous solution a. Na + b. Li + c. Cs + d. Rb + 46. A reaction that is of the first order with respect to reactant A has a rate constant 6 min 1 . If we start with [A] = 0.5 mol L 1 when would [A] reach the value 0.05 mol 1 L 1
? a. 3.84 min b. 3 min c. 0.15 min d. 0.384 min
47. For the process, dry iceà CO2(g) a.
DH is negative while DS is positive
b. Both DH
and DS are positive
c. Both DH and DS are negative d. DH is positive while DS
is negative
48. Which of the following is not used in FriedelCrafts reaction a. Chlorobenzene b. Benzene c. Bromobenzene d. Phenyl acetanilide 49. The pKa of a certain weak acid is 4.0. What should be the [Salt] to [Acid] ratio if we have to prepare a buffer with pH=5 using the acid and one of the salts? a. 5:4 b. 4:5 c. 1:10 d. 10:1 50. If formaldehyde and KOH are heated then we get a. Acetylene b. Ethyl formate c. Methyl alcohol d. Methane
9
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KARNATAKA CET CHEMISTRY‐2000 51. When 9.65 coulombs of electricity is passed through a solution of silver nitrate (atomic mass of Ag= 108.0 g mol 1 ). The amount of silver deposited is a. 6.4 mg b. 10.8 mg c. 21.2 mg d. 16.2 mg 52. Which of the following has lowest percentage of carbon a. Wrought iron b. Cast iron c. All have same percentage d. Steel 53. Brass in an alloy of a. Cu and Zn b. Ni and Zn c. Cu and Al d. Al and Zn 54. A certain compound gives negative test with ninhydrin and positive test with Benedicts solution, it is a. A protein b. A lipid c. A monosaccharide d. An amino acid 55. Which of the following can cause coagulation of proteins? a. Ca ++ b. Mg ++ c. Na ++ d. AG + 56. Solution of sodium metal in liquid ammonia is strongly reducing due to the presence in the solution of the following: a. Solvated electrons b. Sodium atoms c. Sodium amide d. Sodium hydride
10
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KARNATAKA CET CHEMISTRY‐2000 57. A reaction is A+BàC+D initially. We start with equal concentration of A and B. At equilibrium we find the moles of C is two times of a. What is the equilibrium constant of the reaction? a. 2 b. 4 c. ½ d. ¼ 58. One mole of an ideal gas is allowed to expand reversibly and adiabatically form a temperature of 27 o C. If the work done during the process is 3kJ, the final temperature will be equal to (Cv=20Jk1) a. 295 K b. 26.85 oC c. 100 K d. 150 K 59. Unpleasant smelling carbylamines are formed by heating alkali and chloroform with a. Any primary amine b. Any amine c. Any aromatic amine d. Any aliphatic amine 60. H 2 ( g ) + Cl2 ( g ) ® 2 HCl ( g ); DH = - 44 K . cal
2 Na ( s ) + 2 HCl ( g ) ® 2 NaCl ( s ) + H 2( g ); DH = -152 K . cal For the reaction Na ( s ) +
1 Cl2 ( g ) ® NaCl ( s ); DH = ? 2
a. 54 K Cal b. 98 K.Cal c. 196 K.cal d. 108 K cal
11
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