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Sunday, May 11, 2008

eamcet 2008 | eamcet 2008 key | eamcet 2008 solutions | eamcet 2008 results | eamcet 2008 results key and solutions | Andhra Pradesh State Council for

EAMCET 2008 (Engineering, Agricultural and Medical Common Entrance Test) is conducted on behalf of Andhra Pradesh State Council for Higher Education (APSCHE) by the Jawaharlal Nehru Technological University (JNTU) on May 8, 2008.

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Monday, April 28, 2008

aieee 2008 chemistry with solution

aieee-chemistry

2008 - Paper

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36. The ionization enthalpy of hydrogen atom is 1.312 x 10⁶ J mol^-1. The energy required to excite the electron in the atom from n = 1 to n = 2 is

1) 2) 3) 4)

Ans : 3

37. Which one of the following pairs of species have the same bond order ?

1) and 2) and 3) and 4) and

Ans : 4

38. Which one of the following constitutes a group of the isoelectronic species ?

1) 2)

3) 4)

Ans : 1

39. Four species are listed below :

(i) (ii) (iii) (iv)

Which one of the following is correct sequence of their acid strength ?

1) ii <>

Ans : 2

40. The pK_a of a weak acid, HA, is 4.80. The pK_b of a weak base, BOH, is 4.78 . The pH of an aqueous solution of the corresponding salt, BA, will be

1) 4.79 2) 7.01 3) 9.22 4) 9.58

Ans : 2

41. The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

1) 2)

3) 4)

Ans : 1

42. The treatment of CH₃MgX with produces

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	1) 2) 3) CH₄ 4) Ans : 3 43. The hydrocarbon which can react with sodium in liquid ammonia is 1) 2) 3) 4) Ans : 1 44. The vapour pressure of water at 20⁰C is 17.5 mm Hg. If 18 g of glucose (C₆H₁₂O₆) is added to 178.2 of water at 20⁰C , the vapour pressure of the resulting solution will be 1) 15.750 mm Hg 2) 16.500 mm Hg 3) 17.325 mm Hg 4) 17.675 mm Hg Ans : 3 45. Gold numbers of protective colloids A,B,C and D are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is 1) C <> Ans : 2 46. In a compound, atoms of element Y form ccp lattice and those of element X occupy 2/3^rd of tetrahedral voids. The formula of the compound will be 1) X₂Y₃ 2) X₂Y 3) X₃Y₄ 4) X₄Y₃ Ans : 4 47. In context with the industrial preparation of hydrogen from water gas (CO + H₂), which of the following is the correct statement ? 1) CO is removed by absorption in aqueous Cu₂Cl₂ solution 2) H₂ is removed through occlusion with Pd 3) CO is oxidised to CO₂ with steam in the presence of a catalyst followed by absorption of CO₂ in alkali 4) CO and H₂ are fractionally separated using differences in their densities. Ans : 3 48. Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is

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	1) RSiCl₃ 2) R₂SiCl₂ 3) R₃SiCl 4) R₄Si Ans : 1 49. Amount of oxalic acid present in a solution can be determined by its titration with KMnO₄ solution in the presence of H₂SO₄. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl. 1) furnishes H⁺ ions in addition to those from oxalic acid 2) reduces permanganate to Mn²⁺ 3) oxidises oxalic acid to carbon dioxide and water 4) gets oxidised by oxalic acid to chlorine Ans : 2 50. Given . The potential for the cell is 1) 0.339 V 2) - 0.339 V 3) -0.26 V 4) 0.26 V Ans : 4 51. Which one of the following is the correct statement ? 1) Beryllium exhibits coordination number of six 2) Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase 3) B₂H₆, 2NH₃ is known as 'inorganic benzene' 4) Boric acid is protonic acid Ans : 2 52. Identify the wrong statement in the following : 1) Greenhouse effect is responsible for global warming 2) Ozone layer does not permit infrared radiation from the sun to reach the earth 3) Acid rain is mostly because of oxides of nitrogen and sulphur 4) Chlorofluorocarbons are responsible for ozone layer depletion. Ans : 2 53. The coordination number and the oxidation state of the element 'E' in the complex [E(en)₂ (C₂O₄)] NO₂ ( where (en) is ethylene diamine) are, respectively.

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	1) 4 and 2 2) 4 and 3 3) 6 and 3 4) 6 and 2 Ans : 3 54. In which of the following octahedral complexes of Co (at . no.27) , will the magnitude of be the highest ? 1) 2) 3) 4) Ans : 4 55. Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being 1) lesser energy difference between 5f and 6d than between 4f and 5d orbitals 2) more energy difference between 5f and 6d than between 4f and 5d orbitals 3) more reactive nature of the actinoids than the lanthanoids 4) 4f orbitals more diffused than the 5f orbitals Ans : 1 56. Which of the following factor is of *no signficance* for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly? 1) CO₂ is thermodynamically more stable than CS₂ 2) Metal sulphides are less stable than the corresponding oxides 3) CO₂ is more volatile than CS₂ 4) Metal sulphides are thermodynamically more stable than CS₂ Ans : 3 57. Oxidising power of chlorine in aqueous solution can be determined by the parameters indicated below: The energy involved in the conversion of (using the data ) will be 1) 2) 3) 4) Ans : 1

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	58. In the following sequence of reactions, the alkene affords the compound 'B' The compound B is 1) 2) 3) 4) Ans : 3 59. Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives 1) o - nitrophenol 2) p - nitrophenol 3) nitrobenzene 4) 2,4,6-trinitrobenzene Ans : 1 60. Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains. 1) mixture - of o- and p-dibromobenzenes 2) mixture of o- and p-bromoanilines 3) mixture of o- and m-bromotoluenes 4) mixture of o- and p-bromotoluenes Ans : 4 61. The organic chloro compound, which shows complete stereochemical inversion during a S_N2 reaction, is 1) (CH₃)₃CCl 2) (CH₃)₂CHCl 3) CH₃Cl 4) (C₂H₅)₂CHCl Ans : 3 62. The absolute configuration of is 1) R,R 2) R,S 3) S,R 4) S,S Ans : 4 63. glucose and glcose are 1) epimers 2) anomers 3) enantiomers 4) conformers Ans : 2 64. The electrophile, attacks the benzene ring to generate the intermediate complex. Of the following, which complex is of lowest energy ?

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1) 2) 3) 4)

Ans : 3

65. Standard entropy of X₂, Y₂ and XY₃ are 60, 40 and 50 J K^-1 mol^-1, respectively. For the reaction, , to be at equilibrium , the temperature will be

1) 500 K 2) 750 K 3) 1000 K 4) 1250 K

Ans : 2

66. For the following three reactions a,b, and c equilibrium constants are given :

Which of the following relations is correct ?

1) K₂K₃ = K₁ 2) K₃ = K₁K₂ 3) 4)

Ans : 2

67. Bakelite is obtained from phenol by reacting with

1) CH₃CHO 2) CH₃COCH₃ 3) HCHO 4) (CH₂OH)₂

Ans : 3

68. The equilibrium constants and for the reactions and , respectively are in the ratio of 1 : 9. If the degree of dissociation of X and Z be equal then the ratio of total pressures at these equilibria is

1) 1 : 1 2) 1 : 3 3) 1 : 9 4) 1 : 36

Ans : 4

69. For a reaction , rate of disappearance of 'A' is related to the rate of appearance of 'B' by the expression

1) 2) 3) 4)

Ans : 1

70. At 80⁰C , the vapour pressure of pure liquid 'A' is 520 mm Hg and

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aieee 2008 physics key with solutions


		Paper - 1 Part-A_Physics **************************************************************************************************

		1. A body of mass m=3.513kg is moving along the x-axis with a speed of 5.00 ms^_1. The magnitude of its momentum is recorded as 1) 17.565 kg ms^-12) 17.56 kg ms^-1 3) 17.57 kg ms^-1 4) 17.6 kg ms^-1 Ans : 4 2. Consider a uniform square plate of side 'a' and mass 'm'. The moment of inertia of this plate about an axis perpendicular to its plane and passing through one of its corner is 1) 2) 3) 4) Ans : 3 3. The speed of sound in oxygen (O₂) at a certain temperature is 460 ms^-1. The speed of sound in helium (He) at the same temperature will be (assume both gases to be ideal) 1) 500 ms^-1 2) 650 ms^-1 3) 330 ms^-1 4) 460 ms^-1 Ans : Approximately 1437 m/s 4. A thin spherical shell of radius R has charge Q spread uniformly over its surface. Which of the following graphs most closely represents the electric field E(r) produced by the shell in the range , where r is the distance from the centre of the shell ? 1) 2) 3) 4) Ans : 4 5. Relative permitivity and permeability of a material are and , respectively. Which of the following values of these quantities are allowed for a diamagnetic material? 1) 2) 3) 4) Ans : 1 6. Suppose an electron is attracted towards the origin by a force where 'k' is a constant and 'r' is the distance of the electron from the origin. By applying Bohr model to this system, the radius of the n^th orbital of the electron is found to be 'r_n' and the kinetic


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		AIEEE_Physics_Paper-1 Code: A1

		energy of the electron to the 'T_n'. Then which of the following is true ? 1) T_n independent of n, 2) 3) 4) Ans : 1 7. A block of mass 0.50 kg is moving with a speed of 2.00 ms^-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is 1) 1.00 J 2) 0.67 J 3) 0.34 J 4) 0.16 J Ans : 2 8. A wave travelling along the x-axis is described by the equation . If the wavelength and the time period of the wave are 0.08 m and 2.0s, respectively, then and in appropriate units are 1) 2) 3) 4) Ans : 4 9. A working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) terminal to P and Q, some resistance is seen on the multimeter. Which of the following is true for the transistor? 1) It is a pnp transistor with R as collector 2) It is a pnp transistor with R as emitter 3) It is an npn transistor with R as collector 4) It is an npn transistor with R as base Ans : 4 10. A jar is filled with two non-mixing liquids 1 and 2 having densities and , respectively. A solid ball, made of a material of density , is dropped in the jar. It comes to equilibrium in the position shown in the figure.


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		AIEEE_Physics_Paper-1 Code: A1

		Which of the following is true for and ? 1) 2) 3) 4) Ans : 3 11. An athlete in the olympic games covers a distance of 100m in 10s. His kinetic energy can be estimated to be in the range 1) 2) 20,000 J _ 50,000 J 3) 2,000 J _ 5,000 J 4) 200 J _ 500 J Ans : 3 12. A parallel plate capacitor with air between the plates has a capacitance of 9 pF. The separation between its plates is 'd'. The space between the plates is now filled with two dielectrics. One of the dielectrics has dielectric constant and thickness while the other one has dielectric constant and thickness . Capcitance of the capacitor is now 1) 45 pF 2) 40.5 pF 3) 20.25 pF 4) 1.8 pF Ans : 2 13. The dimension of magnetic field in M, L, T and C (Coulomb) is given as 1) 2) 3) 4) Ans : 2 14. A body is at rest at x=0, At t=0, it starts moving in the positive x-direction with a constant acceleration. At the same instant another body passes through x=0 moving in the positive x-direction with a constant speed. The position of the first body is given by


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		AIEEE_Physics_Paper-1 Code: A1

		and the position of the second body is x₂(t) after the same time interval. Which of the following graphs correctly describes as a function of time 't'? 1) 2) 3) 4) Ans : 1 15. In the circuit below, A and B represent two inputs and C represents the output. The circuit represents 1) AND gate 2) NAND gate 3) OR gate 4) NOR gate Ans : 3 16. While measuring the speed of sound by performing a resonance column experiment, a student gets the first resonance condition at a column length of 18 cm during winter. Repeating the same experiment during summer, she measures the column length to be x cm for the second resonacne. Then 1) x > 54 2) 54 > x > 36 3) 36 > x > 18 4) 18 > x Ans : 1 17. Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.


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		AIEEE_Physics_Paper-1 Code: A1

		The value of the unknown resistor R is 1) 2) 3) 4) Ans : 1 18. A spherical solid ball of volume V is made of a material of density . It is falling through a liquid of density . Assume that the liquid applies a viscous force on the ball that is proportional to the square of its speed v, i.e., . The terminal speed of the ball is 1) 2) 3) 4) Ans : 4 19. A thin rod of length 'L' is lying along the x-axis with its ends at x=0 and x=L. Its linear density (mass/length) varies with x as , where n can be zero or any positive number. If the position of the centre of mass of the rod is plotted against 'n', which of the following graphs best approximates the dependence of on n? 1) 2) 3) 4) Ans : 4 20. A planet in a distant solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11 km s^-1, the escape velocity from the surface of the planet would be 1) 2) 3) 4) Ans : 2 21. An insulated container of gas has two chambers separated by an


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		AIEEE_Physics_Paper-1 Code: A1

		insulating partition. One of the chambers has volume V₁ and contains ideal gas at pressure P₁ and temperature T₁. The other chamber has volume V₂ and contains ideal gas at pressure P₂ and temperature T₂. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be 1) 2) 3) 4) Ans : 4 22. Two full turns of the circular scale of a scew gauge cover a distance of 1mm on its main scale. The total number of divisions on the circular scale is 50. Further, it is found that the screw gauge has a zero error of _0.03 mm. While measuring the diameter of a thin wire, a student notes the main scale reading of 3 mm and the number of circular scale divisions in line with the main scale as 35. The diameter of the wire is 1) 3.73 mm 2) 3.67 mm 3) 3.38 mm 4) 3.32 mm Ans : 3 23. A horizontal overhead powerline is at a height of 4m from the ground and carries a current of 100 A from east to west. The magentic field directly below it on the ground is 1) northward 2) southward 3) northward 4) southward Ans : 2 24. An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment distances are measured by 1) a standard laboratory scale 2) a meter scale provided on the microscope 3) a screw gauge provided on the microscope 4) a vernier scale provided on the microscope Ans : 4 25. a 5V battery with internal resistance and a 2V battery with internal resistance are connected to a resistor as shown in the figure.


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		AIEEE_Physics_Paper-1 Code: A1

		The current in the resistor is 1) 2) 3) 4) Ans : 2 26. A capillary tube (A) is dipped in water. Another identical tube (B) is dipped in a soap-water solution. Which of the following shows the relative nature of the liquid columns in the two tubes? 1) 2) 3) 4) Ans : 2 27. Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross-sectional area and length = 20 cm. If one of the solenoids has 300 turns and the other 400 turns, their mutual inductance is 1) 2) 3) 4) Ans : 3 28. A student measures the focal length of a convex lens by putting an object pin at a distance 'u' from the lens and measuring the distance 'v' of the image pin. The graph between 'u' and 'v' plotted by the student should look like


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		AIEEE_Physics_Paper-1 Code: A1


		1) 2) 3) 4) Ans : 2 29. This question contains Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements. Statement-1 : For a mass M kept at the centre of a cube of side 'a', the flux of gravitational field passing through its sides is . Statement-2 : If the direction of a field due to a point source is radial and its dependence on the distance 'r' from the source is given as , its flux through a closed surface depends only on the strength of the source enclosed by the surface and not on the size or shape of the surface. 1) Statement-1 is true, Statement-2 is true; Statement-2 is a correct expalantion for Statement-1 2) Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1 3) Statement-1 is true, Statement-2 is false 4) Statement-1 is false, Statement-2 is true Ans : 2 30. This question contains Statement-1 and Statement-2. Of the four


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		AIEEE_Physics_Paper-1 Code: A1


		choices given after the statements, choose the one best describes the two statements. Statement-1 : Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion. and Statement-2 : For heavy nuclei, binding energy per nucleon increases with increasing Z while for light nuclei it decreases with increasing Z. 1) Statement-1 is true, Statement-2 is true; Statement-2 is a correct expalantion for Statement-1 2) Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1 3) Statement-1 is true, Statement-2 is false 4) Statement-1 is false, Statement-2 is true Ans : 3 Directions : Questions No.31 and 32 are based on the following paragraph. Consider a block of conducting material of resistivity shown in the figure. Current 'I' enters at 'A' and leaves from 'D'. We apply superposition principle to find voltage developed between 'B' and 'C'. The calculation is done in the following steps : i) Take current 'I' entering from 'A' and assume it to spread over a hemispherical surface in the block. ii) Calculate field E(r) at distance 'r' from A by using Ohm's law , where j is the current per unit area at 'r'. iii) From the 'r' dependence of E(r), obtain the potential V(r) at r. iv) Repeat (i), (ii) and (iii) for current 'I' leaving 'D' and superpose results for 'A' and 'D'. 31. For current entering at A, the electric field at a distance 'r' from A is 1) 2) 3) 4) Ans : 2 32. measured between B and C is

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aieee maths key and solutions


	AIEEE -MATHEMATICS 2008 - PAPER- A1 ==============================================
	71. Let be a function defined as where Show that f is invertible and its inverse is 1) 2) 3) 4) Ans : 3 72. Let R be the real line. Consider the following subsets of the plane R x R : Which one of the following is true? 1) Both S and T are equivalence relations on R 2) S is an equivalence relation on R but T is not 3) T is an equivalence relation on R but S is not 4) Neither S nor T is an equivalence relation on R Ans : 3 73. The conjugate of a complex number is . Then that complex number is 1) 2) 3) 4) ANS : 2 74. The quadratic equations and have one root in common. The other roots of the first and second equations are integers in the ratio 4 : 3. Then the common root is 1) 4 2) 3 3) 2 4) 1 ANS : 3 75. Let A be a square matrix all of whose entries are integers. Then which one of the following is true? 1) If exists and all its entries are non-integers.



	2) If exists and all its entries are integers. 3) If need not exist. 4) If exists but all its entries are not necessarily integers. ANS : 2 76. Let a, b, c any real numbers. suppose that there are real numbers x, y, z not all zero such that x = cy+bz, y = az + cx, z = bx + ay. Then is equal to 1) -1 2) 0 3) 1 4) 2 ANS : 3 77. How many different words can be formed by jumbling the letters in the word MISSISSIPPI in which no two S are adjacent? 1) 6 . 7 . 2) 6 . 8 . 3) 7 . . 4) 8 .. ANS : 3 78. The first two terms of a geometric progression add up to 12. The sum of the third and the fourth terms is 48. If the terms of the geometric progression are alternately positive and negative, then the first term is 1) -12 2) 12 3) 4 4) -4 ANS : 1 79. Let Then which one of the following is true? 1) f is differentiable at x = 0 and at x =1 2) f is differentiable at x = 0 but not at x =1 3) f is differentiable at x =1 but not at x = 0 4) f is neither differentiable at x = 0 nor at x =1 ANS : 2 80. How many real solutions does the equation have ? 1) 1 2) 3 3) 5 4) 7 ANS : 1 81. Suppose the cubic x³ - px + q has three distinct real roots where p > 0 and q > 0. Then which one of the following holds? 1) The cubic has minima at and maxima at



	2) The cubic has minima at both and 3) The cubic has maxima at both and 4) The cubic has minima at and maxima at ANS : 4 82. The value of is 1) 2) 3) 4) ANS : 2 83. The area of the plane region bounded by the curves is equal to 1) 1/3 2) 2/3 3) 4/3 4) 5/3 ANS : 3 84. Let Then which one of the following is true ? 1) 2) 3) 4) ANS : 1 85. The differential equation of the family of circles with fixed radius 5 units and centre on the line y =2 is 1) 2) 3) 4) ANS : 2 86. The solution of the differential equation satisfying the condition y (1) = 1 is



	1) 2) 3) 4) ANS : 3 87. The perpendicular bisector of the line seg ment joining and has y -intercept -4. Then a possible value of k is 1) 2 2) -2 3) -4 4) 1 ANS : 3 88. The point diametrically opposite to the point P(1,0) on the circle is 1) (-3,4) 2) (-3, -4) 3) (3,4) 4) (3, -4) ANS : 2 89. A parabola has the origin as its focus and the line x = 2 as the directrix. Then the vertex of the parabola is at 1)) (1,0) 2) (0,1) 3) (2,0) 4) (0,2) ANS : 1 90. A focus of an ellipse is at the origin. The directrix is the line x = 4 and the eccentricity is . Then the length of the semi- major axis is 1) 2) 3) 4) ANS : 4 91 If the straight lines intersect at a point, then the integer k is equal to 1) 5 2) 2 3) -2 4) -5 ANS : 4 92. The line passing through the points (5,1,a) and (3,b, 1) crosses the yz-plane at the point . Then 1) a =4, b = 6 2) a = 6, b = 4 3) a = 8, b =2 4) a =2, b = 8 ANS : 2



	93. The non-zero vectors are related by Then the angle between is 1) 2) 3) 4) 0 ANS : 3 94. The vector lies in the plane of the vectors and bisects the angle between Then which one of the following gives possible values 1) 2) 3) 4) ANS : 3 95. The mean of the numbers a, b, 8, 5, 10 is 6 and the vaariance is 6.80. Then which one of the following gives possible values of a and b ? 1) a = 5 , b =2 2) a =1, b =6 3) a =3, b = 4 4) a = 0, b =7 ANS : 3 96. A die thrown. Let A be the event that the number obtained is greater than 3. Let B be the event that the number obtained is less than 5 . Then is 1) 0 2) 1 3) 2/5 4) 3/5 ANS : 2 97. It is given that the events A and B are such that . Then is 1) 1/3 2) 2/3 3) 1/2 4) 1/6 ANS : 1 98. AB is a vertical pole with B at the ground level and A at the top. A man finds that the angle of elevation of the point A from a certain point C on the ground is 60°. He moves away from the pole along the line BC to a point D such that CD = 7m. From D the angle of elevation of the point A is 45°. Then the height of the pole is 1) 2) 3) 4) ANS: 1

99. The value of is

1) 3/17 2) 4/17 3) 5/17 4) 6/17

ANS : 4

100. The statement is equivalent to

1) 2) 3) 4)

ANS : 1

Directions: Questions number 101 to 105 are Assertion -Reason type questions. Each of these questions contains two statements : Statement -1 (Assertion) and Statement -2 (Reason) . Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select the correct choice.

101. Let A be a 2 x2 matrix with real entries. Let I be the 2x2 identity matrix. Denote by tr(A), the sum of diagonal entries of A. Assume that A² = I.

Statement - 1 : If