Therefore, Benzaldehyde does NOT give Fehling’s test.
Advertisements
Advertisements
प्रश्न
Benzaldehyde does NOT show positive test with ______.
विकल्प
Schiff reagent
Tollens' reagent
Sodium bisulphite solution
Fehling solution
MCQ
रिक्त स्थान भरें
Advertisements
उत्तर
Benzaldehyde does NOT show positive test with Fehling solution.
Explanation:
Benzaldehyde is an aromatic aldehyde. Aromatic aldehydes do not reduce Fehling solution, so the test is negative. But they do give:
- Schiff test
- Tollens’ test
- Sodium bisulphite addition
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Write reactions for the action of the following reagents on p-chlorobenzaldehyde.
Tollen’s reagent
Which of the following gives red precipitate with Fehling's solution?
Compounds of general formula, are called ____________.
\[\begin{array}{cc} \phantom{...}\ce{R}\phantom{....}\ce{OR''}\phantom{}\\ \phantom{}\backslash\phantom{..}/\\ \ce{C}\\ \phantom{}/\phantom{..}\backslash\\ \phantom{...}\ce{R'}\phantom{...}\ce{OR''}\phantom{} \end{array}\]
\[\begin{array}{cc} \phantom{...}\ce{R}\phantom{.................}\ce{R}\phantom{..}\ce{H}\phantom{................}\\ \phantom{...}\backslash\phantom{..................}\backslash/\phantom{..........}\phantom{.......}\\ \ce{C = O ->[H2NNH2][KOH/glycol] C + N2 + H2O}\\ \phantom{}/\phantom{............}\phantom{.......}/\phantom{}\backslash\phantom{...............}\\ \phantom{}\ce{R}\phantom{..................}\ce{R}\phantom{..}\ce{H}\phantom{...............} \end{array}\]
Reaction is called ____________.
Compounds of general formula, are called ____________.
\[\begin{array}{cc} \phantom{...}\ce{R}\phantom{....}\ce{OR'}\phantom{}\\ \phantom{}\backslash\phantom{..}/\\ \ce{C}\\ \phantom{}/\phantom{..}\backslash\\ \phantom{...}\ce{H}\phantom{....}\ce{OR'}\phantom{} \end{array}\]
Which of the following will give positive iodoform test?
Which of the following reagents is used for the following conversion?
\[\ce{CH3 - CH = CH - CHO -> CH3 - CH = CH - CH2OH}\]
Identify the product Y in the following series of reactions.
\[\ce{4-Nitrotoluene ->[(CH3CO)2O/CrO3][273 - 278 K] X ->[H3O^+][\Delta] Y}\]
Predict the product Z in the following series of reactions.
\[\ce{Ethanoic acid ->[PCl5] X ->[C6H6][Anhydrous AlCl3] Y ->[i) CH3MgBr][H3O^+] Z}\]
Which of the following represents the correct order of acidity in the given compounds.
Identify the product formed in the reaction.
In which of the following reactions new carbon-carbon bond is not formed?
How will you convert benzaldehyde into the following compound?
Benzoic acid
What is the action of HCN on propanone?
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
How is the following conversion effected propanal into butanone?
How is the following conversion effected phenyl methanal into benzoin?
How will you prepare ethyl acetate from methyl acetate?
How will you prepare malachite green from benzaldehyde?
A substance C4H10O yields on oxidation a compound, C4H8O which gives an oxime and a positive iodoform test. The original substance on treatment with a conc. H2SO4 gives C4H8. The structure of the compound is ______.
Which of the following reaction does not involve either oxidation or reduction?
Which of the following is most reactive towards the addition reaction of hydrogen cyanide to form the corresponding cyanohydrin?
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
Give two examples which undergo Wolf-Kishner reduction.
What is the action of hydrogen cyanide on the following?
Acetone
Write the structure of the products obtained from the following ketones by action of hydrazine in presence of strong base KOH.
Write reactions when phenol reacts with Dilute HNO3
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
