AIPMT 2007 Prelims

178 Questions • 178 Minutes • 2007

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Q61
Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching?
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Q62
If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately (log 4 = 0.60, log 5 = 0.69)
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Q63
Which of the following will give a pair of enantiomorphs? (en = NH₂CH₂CH₂NH₂)
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Q64
If NaCl is doped with 10⁻⁴ mol % of SrCl₂, the concentration of cation vacancies will be (NA = 6.02 × 10²³ mol⁻¹)
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Q65
The d electron configurations of Cr²⁺, Mn²⁺, Fe²⁺ and Ni²⁺ are 3d⁴, 3d⁵, 3d⁶ and 3d⁸ respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour? (At. No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)
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Q66
In which of the following the hydration energy is higher than the lattice energy?
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Q67
Which of the compounds with molecular formula C₅H₁₀ yields acetone on ozonolysis?
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Q68
Which one of the following ionic species has the greatest proton affinity to form stable compound?
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Q69
The following equilibrium constants are given: N₂ + 3H₂ ⇌ 2NH₃ ; K₁ N₂ + O₂ ⇌ 2NO ; K₂ H₂ + ½O₂ ⇌ H₂O ; K₃ The equilibrium constant for the oxidation of NH₃ by oxygen to give NO is
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Q70
Which one of the following ions is the most stable in aqueous solution? (At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)
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Q71
The correct order of C–O bond length among CO, CO₃²⁻, CO₂ is
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Q72
Which one of the following orders correctly represents the increasing acid strengths of the given acids?
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Q73
Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?
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Q74
For (i) I⁻, (ii) Cl⁻, (iii) Br⁻, the increasing order of nucleophilicity would be
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Q75
Calculate the pOH of a solution at 25°C that contains 1 × 10⁻¹⁰ M of hydronium ions, i.e. H₃O⁺.
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Q76
Consider the following sets of quantum numbers (n, l, m, s): (i) 3, 0, 0, +1/2 (ii) 2, 2, 1, +1/2 (iii) 4, 3, −2, −1/2 (iv) 1, 0, −1, −1/2 (v) 3, 2, 3, +1/2 Which of the following sets of quantum number is not possible?
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Q77
The equilibrium constant of the reaction: Cu(s) + 2Ag⁺(aq) → Cu²⁺(aq) + 2Ag(s) ; E° = 0.46 V at 298 K is
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Q78
Which one of the following polymers is prepared by condensation polymerisation?
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Q79
The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) toluene (iii) chlorobenzene (iv) phenol
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Q80
Which of the following anions is present in the chain structure of silicates?
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Paper Info
  • Exam: AIPMT Prelims
  • Year: 2007
  • Questions: 178
  • Duration: 178 mins
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