Advertisements
Advertisements
Question
Write chemical test to distinguish between the following compounds:
Phenol and Benzoic acid
Advertisements
Solution
Phenol and Benzoic Acid can be distinguished by the iron chloride FeCl3 test. As phenol gives violet colouration with neutral FeCl3, solution while benzoic acid gives buff-coloured precipitate of ferric benzoate.
\[\ce{6C6H5OH + FeCl3 -> [\underset{Violet complex}{Fe(OC6H5)6]^{3-}} + 3H^{+} + 3HCl}\]
\[\ce{\underset{Benzoic acid}{3C6H5COOH} + FeCl3 -> \underset{Buff coloured ppt.}{(C6H5COO)3Fe} + 3HCl}\]
APPEARS IN
RELATED QUESTIONS
Distinguish between: CH3COOH and HCOOH
A and B are two functional isomers of compound C3H6O.On heating with NaOH and I2, isomer B forms yellow precipitate of iodoform whereas isomer A does not form any precipitate. Write the formulae of A and B.
Out of CH3CH2 – CO – CH2 – CH3 and CH3CH2 – CH2 – CO – CH3, which gives iodoform test?
Complete the synthesis by giving missing starting material, reagent or product.
Which of the following compounds will give butanone on oxidation with alkaline \[\ce{KMnO4}\] solution?
Oxidation of ketones involves carbon-carbon bond cleavage. Name the products formed on oxidation of 2, 5-dimethylhexan-3-one.
Acetone and acetaldehyde are differentiated by
A hydrocarbon (A) with molecular formula C5H10 on ozonolysis gives two products (B) and (C). Both (B) and (C) give a yellow precipitate when heated with iodine in presence of NaOH while only (B) give a silver mirror on reaction with Tollen’s reagent.
- Identify (A), (B) and (C).
- Write the reaction of B with Tollen’s reagent.
- Write the equation for iodoform test for C.
- Write down the equation for aldol condensation reaction of B and C.
The correct set of products obtained in the following reactions:
- \[\ce{RCN ->[reduction]}\]
- \[\ce{RCN ->[(i) CH3MgBr][(ii) H2O]}\]
- \[\ce{RNC ->[hydrolysis]}\]
- \[\ce{RNH2 ->[HNO2]}\]
An organic compound 'A' with molecular formula C5H8O2 is reduced to n-pentane with hydrazine followed by heating with NaOH and glycol. 'A' forms a dioxime with hydroxylamine and gives a positive iodoform and Tollen's test. Identify 'A' and give its reaction for iodoform and Tollen's test.
