Advertisements
Advertisements
प्रश्न
Answer in brief.
Give a simple chemical test to distinguish between ethanol and ethyl bromide.
Advertisements
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
Answer in brief.
Explain why p-nitrophenol is a stronger acid than phenol.
Write the reaction involved in the preparation of phenol from benzene sulphonic acid.
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
What is the action of conc. H2SO4 on carbolic acid at 373 K.
Write chemical reactions to convert phenol into salicyaldehyde. Write the name of the reaction. What happens when if CCl4 is used instead of CHCl3 in the above reaction.
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.
Which alcohol is difficult to oxidise?
____________ is used for silvering mirrors.
Which of the following compounds does not react with bromine in alkaline medium?
Which of the following compounds is obtained, when phenol react with bromine water?
Sodium metal with ethyl alcohol gives __________ gas.
Bromination of phenol, will NOT give:
Which of following elements does not react with hot concentrated sulphuric acid?
What is the product of the following reaction?
\[\ce{CH3 - CH2 - CH2 - OH ->[conc. H2SO4][\Delta]}\]
\[\ce{CH3 - CH = CH2 ->[HBr][Peroxide] A}\]
Identify A.
\[\ce{Isopropyl alcohol + acidic K2Cr2O7 -> X}\]
Identify product 'X' in the above reactions.
(I)
(II) \[\ce{P + Zn ->[\Delta] Q}\]
(III) \[\ce{P ->[Na2Cr2O7][H2SO4] R}\]
Q and R are respectively:
Identify the product B in following conversion.
\[\ce{Chlorobenzene + H2O ->[Cu, 673 K][Pressure] A ->[conc. H2SO4][373 K] B}\]
Which following reagent is used to obtain alkene from alcohol?
Which of the following alcohols is least soluble in water?
Identify the alcohol that reacts immediately with Lucas reagent?
Identify the role of PDC from the following.
Ethyl alcohol can be prepared from a Grignard reagent by the reaction of ______.
Which among the following phenolic compound is most acidic in nature?
Which of the following compounds has lowest boiling point?
Which among the following is not the method of preparation of phenol?
Write the chemical reaction when hot copper is treated with Vapours of 1° (primary) alcohol.
Explain: Phenols are acid while alcohol is neutral.
Arrange the following compounds in order of decreasing acidity:
