AIPMT 2009 Prelims

189 Questions • 189 Minutes • 2009

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Q41
The mean free path of electrons in a metal is 4 × 10⁻⁸ m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in units of V/m:
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Q42
The ionization energy of the electron in the hydrogen atom in its ground state is 13.6 eV. The atoms are excited to higher energy levels to emit radiations of 6 wavelengths. Maximum wavelength of emitted radiation corresponds to the transition between:
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Q43
Under the influence of a uniform magnetic field, a charged particle moves with constant speed V in a circle of radius R. The time period of rotation of the particle:
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Q44
The electric field part of an electromagnetic wave in a medium is represented by Ex = 0; Ey = 2.5 (N/C) cos[(2π × 10⁶ rad/s) t − (π × 10⁻² rad/m) x]; Ez = 0. The wave is:
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Q45
A block of mass M is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force constant value k. The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be:
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Q46
Sodium has body centred packing. Distance between two nearest atoms is 3.7 Å. The lattice parameter is:
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Q47
The state of hybridization of C2, C3, C5 and C6 of the hydrocarbon CH₃–C(CH₃)₂–CH=CH–CH(CH₃)–C≡CH (numbered from the right: C≡CH carbons are C1 and C2, the CH(CH₃) carbon is C3, CH=CH are C4 and C5, the C(CH₃)₂ carbon is C6, end CH₃ is C7) is in the following sequence:
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Q48
Oxidation numbers of P in PO₄³⁻, of S in SO₄²⁻ and that of Cr in Cr₂O₇²⁻, are respectively :
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Q49
Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be:
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Q50
Which of the following reactions is an example of nucleophilic substitution reaction?
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Q51
In the case of alkali metals, the covalent character decreases in the order:
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Q52
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
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Q53
The stability of +1 oxidation state increases in the sequence:
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Q54
Given: (i) Cu²⁺ + 2e⁻ → Cu, E° = 0.337 V (ii) Cu²⁺ + e⁻ → Cu⁺, E° = 0.153 V Electrode potential, E° for the reaction, Cu⁺ + e⁻ → Cu, will be:
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Q55
For the reaction N₂ + 3H₂ → 2NH₃, if d[NH₃]/dt = 2 × 10⁻⁴ mol L⁻¹ s⁻¹, the value of −d[H₂]/dt would be :
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Q56
Consider the following reaction: ethanol —(PBr₃)→ X —(alc. KOH)→ Y —((i) H₂SO₄, room temperature; (ii) H₂O, heat)→ Z The product Z is:
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Q57
The energy absorbed by each molecule (A₂) of a substance is 4.4 × 10⁻¹⁹ J and bond energy per molecule is 4.0 × 10⁻¹⁹ J. The kinetic energy of the molecule per atom will be:
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Q58
Amongst the elements with following electronic configurations, which one of them may have the highest ionization energy?
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Q59
In the reaction BrO₃⁻(aq) + 5Br⁻(aq) + 6H⁺(aq) → 3Br₂(l) + 3H₂O(l), the rate of appearance of bromine (Br₂) is related to rate of disappearance of bromide ions as following:
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Q60
A 0.0020 m aqueous solution of an ionic compound Co(NH₃)₅(NO₂)Cl freezes at −0.00732 °C. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (Kf = −1.86 °C/m)
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Paper Info
  • Exam: AIPMT Prelims
  • Year: 2009
  • Questions: 189
  • Duration: 189 mins
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