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प्रश्न
What is the action of following on phenol at low temperature?
- dil. HNO3
- conc. H2SO4
- Br2/CS2
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उत्तर
- Dilute HNO3: Phenol reacts with dilute nitric acid at low temperature to give a mixture of ortho- and para-nitrophenol.
- Conc. H2SO4: At room temperature (298 K), phenol reacts with concentrated sulphuric acid to form o-phenolsulphonic acid.
- Br2 in CS2: When a reaction is carried out in a solvent of lower polarity like CS2 a mixture of ortho- and para-bromophenol is formed.
संबंधित प्रश्न
Choose the correct option.
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Answer in one sentence/ word.
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Answer in brief.
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Answer in brief.
Give a simple chemical test to distinguish between ethanol and ethyl bromide.
An ether (A), C5H12O, when heated with excess of hot HI produce two alkyl halides which on hydrolysis form compound (B) and (C), oxidation of (B) gave and acid (D), whereas oxidation of (C) gave a ketone (E). Deduce the structural formula of (A), (B), (C), (D), and (E).
Reaction between hot conc. HI and anisole gives ______________
The reagents used to convert phenol to 2,4,6-tribromophenol is _____________
Draw intramolecular hydrogen bonding structure in o-nitrophenol.
Name the reagents used to convert phenol into
- picric acid
- p-benzoquinone
An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula C2H4O on oxidation with pyridinium chlorochromate. Give the chemical equations in support of these observations.
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\[\ce{CH3 - CH = CH2 ->[HBr][Peroxide] A}\]
Identify A.
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In Dow process, chlorobenzene is converted into phenol by ____________.
The most resistant alcohol towards oxidation reaction is:
Identify the product B in following conversion.
\[\ce{Chlorobenzene + H2O ->[Cu, 673 K][Pressure] A ->[conc. H2SO4][373 K] B}\]
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Identify the product obtained when phenol is treated with bromine water?
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cumene to phenol.
