Multiple Choice QuestionsPhenol reacts with dilute nitric acid at normal temperature to form
o-nitrophenol
m-nitrophenol
o-and p-nitropheno
2, 4, 6-trinitrophenol
No new C-C bond is formed in
Cannizaro reaction
Reimer- Tiemann reaction
Wurtz reaction
Aldol condensation
Which of the following compounds does not give Friedel-Craft's reaction ?
benzene
xylene
nitrobenzene
phenol
C.
nitrobenzene
Friedel - Craft's reaction involves electrophilic substitution and electrophile attacks at the electron rich site. Presence of electron releasing substituent (like CH3) increases the electron density over benzene nucleus, and thus activates it towards electrophlc substitution. -NO2 is a electron withdrawing group and thus, deactivates the benzene nucleus strongly. Hence, nitrobenzene does not give Friedel-Craft's reaction.
Which is not present in Grignard reagent ?
Methyl group
Magnesium ion
Halogen atom
Carboxylic group
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