Advertisements
Advertisements
प्रश्न
Answer in brief.
Give a simple chemical test to distinguish between ethanol and ethyl bromide.
उत्तर
i. Ethanol on reaction with a very strong base like alkali metal Na or K gives sodium or potassium ethoxide with the liberation of hydrogen gas.
\[\ce{2CH3CH2 - OH + 2Na -> 2CH3CH2O^-Na+ + H2_{(g)}↑}\]
ii. Ethyl bromide on reaction with sodium metal does not liberate hydrogen gas.
\[\ce{2CH3CH2Br + 2Na -> CH3CH2 - CH2CH3 + 2NaBr}\]
APPEARS IN
संबंधित प्रश्न
Choose the correct option.
Which is the most resistant alcohol towards oxidation reaction among the following?
Answer in brief.
Give the reagents and conditions necessary to prepare phenol from Benzene sulfonic acid.
Answer in brief.
Explain why p-nitrophenol is a stronger acid than phenol.
When vapours of tert.butyl alcohol are passed over hot copper, it gives _____________
Write the reaction to get aspirin from salicylic acid.
What is the action of following reagents on pent-3-enal?
- H2/Ni
- LiAlH4/H3O+
Write chemical equation of acetyl chloride with phenol
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.
How will you bring about the following conversions?
isopropyl alcohol to acetone
How will you bring about the following conversions?
acetone to 2-methylpropan-2-ol
Number of oxygen atoms present in salicylaldehyde are ______.
Phenol is ____________.
Which of following elements does not react with hot concentrated sulphuric acid?
Cumene is used in the commercial method for the manufacture of ____________.
The product 'C' in the following reaction is:
\[\ce{CH3CH2Br ->[alc. KCN] {'A'} ->[H3O^+][\Delta] {'B'} ->[i. LiAlH4][ii. H3O^+] {'C'}}\]
Phenoxide ion is more stable than phenol due to the ____________.
Identify reagents X, Y and Z.
In Raschig's method for synthesis of phenol, the reactants used are ____________.
\[\ce{Isopropyl alcohol + acidic K2Cr2O7 -> X}\]
Identify product 'X' in the above reactions.
Which of the following alcohols is NOT prepared by reduction of carbonyl compounds?
Name the catalyst used in commercial method of preparation of phenol.
Amongst the following alcohols which would react fastest with cone. HCl and ZnCl2?
Which of the following compounds reacts immediately with Lucas reagent?
The product C in the following reaction is
The order of reactivity of hydrogen halides with ether is as follows.
What is the action of nitrous acid on aniline?
Arrange the following compounds in an increasing order of their solubility in water:
Write the product when 1°, 2° and 3° alcohol vapours are passed over hot copper.
Explain: Phenols are acid while alcohol is neutral.
