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The energy required to remove an electron from a neutral isolated gaseous stom and convert it into a positively charged gaseous ion is called ionisation energy or first ionisation energy.
Ionisation energy required to remove the second electron from a monovalent cation is called second ionization energy.
Similarly, the energy required to remove the third electron from a divalent cation is called the third ionisation energy.
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Chlorination at C-2 and C-4 produces no chiral compound.
Hence (b) is the correct answer.
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Gaurav Seth 5 years, 1 month ago
Among the following compounds, the most acidic is: [JEE-2011]
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a)
p - nitrophenol
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b)
p - hydroxybenzoic acid
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c)
o - hydroxybenzoic acid
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d)
p - toluic acid
Correct answer is option 'C'.
Ortho-isomer, a strong hydrogen bridge can be formed between the phenolic -OH and the the carboxylate anion. This will tend to stabilize the conjugated carboxylate base, and hence will increase acidity.
this is the order of acidic
ortho hydroxy B.acid > meta hydroxy B.acid > benzoic acid > para hydroxy B. acids.
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