Recent questions and answers in Alcohols, Phenols and Ethers

How will you prepare benzyl alcohol from benzaldehyde with out using a reducing agent ?

answered Nov 2, 2018 by anil197771

1 answer

What is Woods Sprint.

answered Jul 18, 2017 by pady_1

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Give the uses of Ethers.

answered Jul 18, 2017 by pady_1

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How to distinguish between (i) Phenol and alcohol (ii) Prima

asked Jul 18, 2017 by pady_1

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Phenol is more acidic than Alcohols. Why?

answered Jul 18, 2017 by pady_1

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Why Alcohols and Phenols are soluble in water.

answered Jul 18, 2017 by pady_1

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Give the preparation of Alcohols from Carbonyl Compounds

answered Jul 18, 2017 by pady_1

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Give the classification Alcohols.

answered Jul 18, 2017 by pady_1

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How are Alcohols and Phenols are formed.

answered Jul 18, 2017 by pady_1

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Which one of the following compounds is resistant to nucleophilic attack by hydroxylions ?

answered Jan 7, 2017 by harryharkul

2 answers

An alcohol A $(C_4H_{10}O)$ on oxidation with acidified potassium dichromate gives carboxylic acid B $(C_4H_8O_2)$. Compound A when dehydrated with conc. $H_2SO_4$ at $443 \;K$ gives compound C. Treatment of C with aqueous $H_2SO_4$ gives compound D $(C_4H_{10}O)$ which is an isomer of A. Compound D is resistant to oxidation but compound A can be easily oxidised. Identify A, B, C and D and write their structures

answered Dec 29, 2016 by meena.p

1 answer

An organic compound A having molecular formula $C_6H_6O$ gives a characteristic colour with aqueous $FeCl_3$ . When A is treated with $NaOH$ and $CO_2$ at $400\;K$ under pressure, compound B is obtained. Compound B on acidification gives compound C which reacts with acetyl chloride to form D which is a popular pain killer. Deduce the structure of A, B, C and D. What is the common name of Drug D?

answered Dec 29, 2016 by meena.p

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(a)Which of the following is an appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene and why?

answered Nov 29, 2016 by meena.p

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Explain the following observations: (i) The boiling point of ethanol is higher than that of methoxy methane. (ii) Phenol is more acidic than ethanol (iii) O-and -P - nitrophenols are more acidic than phenol . (iv) Phenol is an acid but does not react with sodium bicarbonate solution .

answered Nov 29, 2016 by meena.p

1 answer

Ethyl alcohol to which another liquid has been added to make it unfit for use as beverage is called denatured alcohol. Ethyl alcohol denatured by adding methyl alcohol, is highly poisonous. Answer the following questions: (i) Mention another way by which alcohol is denatured. (ii) Explain why methanol is highly toxic to human beings? (iii) How is methanol prepared on large-scale? Give its two important uses.

answered Nov 28, 2016 by meena.p

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An aromatic compound 'A' on treatment with $CHCl_3/KOH$ gives two compounds 'B' and 'C'. Both B and C give the same product 'D' when distilled with zinc dust. oxidation of D gives E having molecular formula $C_7H_6O_2$. The sodium salt of E on heating with sodalime gives F which may also be obtained by distilling A with Zinc dust . Identify A to F

answered Nov 23, 2016 by meena.p

1 answer

a)Give reasons for the following : (i) Glucose does not give 2,4-DNP test and Schiff’s test (ii) Amino acids have high melting points and are soluble in water. (b) What is meant by the secondary structure of proteins?

answered Nov 16, 2016 by meena.p

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Write two important uses of formalin .

answered Nov 14, 2016 by meena.p

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(a) Give the equation of reaction for the preparation of phenol from cumene. (b) Write the chemical reaction for the preparation of phenol from chloro benzene

answered Nov 11, 2016 by meena.p

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(a) Write a suitable chemical equation to complete each of the following transformations: (i) Butan-1-ol to butanoic acid . ( ii) 4 -Methylacetophenone to benzene -1,4-dicarboxylic acid (b) Suggest a reagent for conservation of ethanol to ethanoic acid

answered Nov 9, 2016 by meena.p

1 answer

Name the alkyl halide and sodium alkaloid used to synthesize tert - butyl ether

answered Nov 8, 2016 by meena.p

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Show how will you synthesize : (i) 1- phenylethanol from a suitable alkene (ii) cyclohexyl methanol using an alkyl halide by an $SN^2$ reaction . (iii) Pentan-1-ol using a suitable alkyl halide ?

answered Nov 7, 2016 by meena.p

1 answer

How do you account for the miscibility of ethoxyethane with water.

answered Nov 4, 2016 by meena.p

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(a) Illustrate the following reactions giving a suitable example for each : (i) Cross aldol condensation (ii) Decarboxylation (b) Give Simple tests to distinguish between the following pairs of compounds : (i) Pentan -2-one and pentan -3-one (ii) Benzaldehyde and Acetophenone (iii) Phenol and Benzoic acid .

answered Nov 2, 2016 by meena.p

1 answer

Lower alcohol are soluable in water higher alcohols are not why ?

answered Nov 1, 2016 by meena.p

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Explain why phenols do not undergo substitution of the -OH group like alcohols ?

answered Oct 31, 2016 by meena.p

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Although chlorine is an electron with drawing group , yet it is ortho- , Para - directing in electrophilic aromatic substitution reaction . Explain why it is so ?

answered Oct 26, 2016 by meena.p

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Suggest a reagent for conservation of ethanol to ethanoic acid

answered Oct 25, 2016 by meena.p

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(a) Give names of the reagents to bring about the following transformations : (i) Ethanoic acid to ethanol (ii) Propan -1-ol to propanal (iii) Pent -3-en-2-ol pent-3-en-2-one (iv) Sodium benzoate to benzene (b) Arrange in the following in increasing order of : (i) Methanal , Propanal, Butanone, ethanal,Propanone(Nucleophilic addition reaction ) (ii) Formaldehyde , Acetone , Acetaldehyde (reactivity towards HCN) (iii) Acetophenone, p- tolualdehyde, p-nitrobenzaldehyde, Benzaldehyde(nucleophilic addition reaction ).

answered Oct 24, 2016 by meena.p

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Arrange the following in order of decreasing acid strength $CH_3OH, H_2O ,C_6H_5OH$

answered Oct 21, 2016 by meena.p

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Alcohols act as weak bases . explain

answered Oct 14, 2016 by meena.p

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a)Give the mechanism of preparation of ethoxy ethane from ethanol b) Alcohols act as weak bases . explain .

answered Oct 14, 2016 by meena.p

1 answer

In the following sequence of reaction $CH_3CH_2OH \quad \underrightarrow {P+I_2} \quad A \quad \underrightarrow {Mg} \quad B \quad \underrightarrow {HCHO} \quad C \quad \underrightarrow {H_2O} D$ the compound D is :

answered Dec 8, 2015 by meena.p

1 answer

In the reaction sequence : $CaC_2 \quad \underrightarrow {H_2O} \quad A \quad \underrightarrow {dil.H_2SO_4} \quad B \quad \underrightarrow {H_2/Ni}\quad C$, the term C is

answered Dec 8, 2015 by meena.p

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In the following sequence of reactions $CH_3-Br \quad$$ \underrightarrow {KCN} A\quad \underrightarrow{H_3 O} \quad B \underrightarrow{LiAlH_4} \quad C$

answered Dec 8, 2015 by meena.p

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But-1-ene $\to$ ? the product in the above reaction is ?

answered Dec 8, 2015 by meena.p

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End product of the following reaction is $CH_3CH_2COOH \to alcoholic KOH$

answered Dec 8, 2015 by meena.p

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Alkyl Fluorides are synthesised by heating an alkyl chloride / bromide in presence of - or -

answered Dec 8, 2015 by meena.p

1 answer