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.
Give the reagents and conditions necessary to prepare phenol from Benzene sulfonic acid.
Answer in brief.
Give the equations of the reactions for the preparation of phenol from isopropyl benezene.
When vapours of tert.butyl alcohol are passed over hot copper, it gives _____________
Name the reagents used to convert phenol into
- picric acid
- p-benzoquinone
How will you bring about the following conversions?
2-methyl propan-2-ol to 2-methylpropene
Write the reactions for the preparation of carbolic acid from aniline.
Which alcohol is difficult to oxidise?
____________ is used for silvering mirrors.
Which of the following reagents are required in the conversion of phenol to salicylic acid?
Which of the following compounds is obtained, when phenol react with bromine water?
The CORRECT decreasing order of boiling points for isomeric primary (1°), secondary (2°) and tertiary (3°) alcohols is ____________.
Phenol is ____________.
Isobutylene on hydroboration followed by oxidation with hydrogen peroxide in presence of base yields ______.
Which of following elements does not react with hot concentrated sulphuric acid?
Identify 'A' and 'B' in the following series of reactions.
The product 'C' in the following reaction is:
\[\ce{CH3CH2Br ->[alc. KCN] {'A'} ->[H3O^+][\Delta] {'B'} ->[i. LiAlH4][ii. H3O^+] {'C'}}\]
Sodium benzene sulphonate reacts with NaOH and then on acidic hydrolysis, it gives __________.
Which of the following reagents is used to convert phenol to benzene?
(I)
(II) \[\ce{P + Zn ->[\Delta] Q}\]
(III) \[\ce{P ->[Na2Cr2O7][H2SO4] R}\]
Q and R are respectively:
Which of the following compounds does NOT react with sodium metal?
Identify 'Z' in the following series of reaction:
\[\ce{Butan - 2 - ol ->[PCl3] X ->[alco. KOH] Y ->[i) H2SO4][ii) H-OH/heat] Z}\]
Identify the alcohol that reacts immediately with Lucas reagent?
Which of the following alcohols is NOT prepared by reduction of carbonyl compounds?
Identify the compound amongst the following of which 0.1 M aqueous solution has highest boiling point.
Which of the following compounds has lowest boiling point?
What is the product obtained in Reimer - Tiemann reaction?
Explain: Phenols are acid while alcohol is neutral.
