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प्रश्न
Answer in one sentence/ word.
Write the name of the electrophile used in Kolbe’s Reaction.
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उत्तर
Carbon dioxide
संबंधित प्रश्न
Choose the correct option.
Which is the most resistant alcohol towards oxidation reaction among the following?
Answer in one sentence/ word.
Hydroboration-oxidation of propene gives _________.
Answer in one sentence/ word.
Write the IUPAC name of alcohol having molecular formula C4H10O which is resistant towards oxidation.
Give the reagents and conditions necessary to prepare phenol from Chlorobenzene.
Answer in brief.
Give the equations of the reactions for the preparation of phenol from isopropyl benezene.
Reaction between Grignard reagent and aldehyde other than formaldehyde leads to formation of _______________
Oxidation of ethyl alcohol using K2Cr2O7/dil H2SO4 leads to formation of _______________
When vapours of tert.butyl alcohol are passed over hot copper, it gives _____________
Reaction between hot conc. HI and anisole gives ______________
Arrange the following in decreasing order of acid strength.
CH3OH, CH3–CH2–OH, CH3–CH(OH)–CH3, (CH3)3–C–OH
Write the reaction involved in the preparation of phenol from benzene sulphonic acid.
Write Kolbe’s reaction.
What is the action of following on phenol at low temperature?
- dil. HNO3
- conc. H2SO4
- Br2/CS2
An unknown alcohol is treated with Lucas reagent. Explain how you will determine whether the alcohol is primary, secondary or tertiary. Indicate by chemical equation the reaction between isopropyl alcohol and Lucas reagent.
What is the action of conc. H2SO4 on carbolic acid at 373 K.
Which of the following compounds is obtained, when phenol react with bromine water?
Sodium metal with ethyl alcohol gives __________ gas.
The secondary alcohol is ____________.
Which of following elements does not react with hot concentrated sulphuric acid?
+I effect of alkyl groups in alcohols increases the stability of ____________.
Which of the following alcohols has tertiary allylic carbon?
In Raschig's method for synthesis of phenol, the reactants used are ____________.
(I)
(II) \[\ce{P + Zn ->[\Delta] Q}\]
(III) \[\ce{P ->[Na2Cr2O7][H2SO4] R}\]
Q and R are respectively:
Identify the reagent A used in the following conversion.
\[\ce{Phenol ->[A] Benzoquinone}\]
Which of the following compounds reacts immediately with Lucas reagent?
The product C in the following reaction is
Write chemical reaction when hot copper is treated with Vapours of 3° (tertiary) alcohol.
Which of the following is trihydric phenol?
