All India Engineering / Architecture Entrance Examination (AIEEE)

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AIEEE 2010 Chemistry

Q. 26. Ionisation energy of He+ is 19.6 × 10^-18 Jatom^-1. The energy of the first stationary state (n = 1) of Li²⁺ is.

Sol:

Answer: (2)

Q. 27. From amongst the following alcohols the one that would react fastest with conc. HCl and anhydrous ZnCl₂, is

1. 2-Butanol
2. 2-Methylpropan-2-ol
3. 2-Methylpropanol
4. 1-Butanol

Sol :

2-Methylpropan-2-ol reacts fastest with HCl and anhydrous ZnCl₂ as it proceeds through the formation of stable tertiary carbocation.

Answer: (2)