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All India Engineering / Architecture Entrance Examination (AIEEE)

CBSE Guess > AIEEE > AIEEE Papers > 2008 > Chemistry

AIEEE 2008 Chemistry

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Q. 13. Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives

  1. p-nitrophenol
  2. nitrobenzene
  3. 2,4,6-trinitrobenzene
  4. o-nitrophenol

Sol:

As, temperature is not mentioned, 0- mitrophenol is the only stable product.

Q. 14. The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol-1. The energy required to excite the electron in the atom from n = 1 to n = 2 is

Sol:

Q. 15. The organic chloro compound, which shows complete stereochemical inversion during a SN2 reaction, is

  1. (CH3)2CHCl
  2. CH3Cl
  3. (C2H5)2CHCl
  4. (CH3)3CCl

Sol: Primary halides show inversion during SN2 reaction more than secondary while secondary show more than tertiary.

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