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Question
The following compounds will give positive Fehling’s test.
Options
Propanone
Pentan-3-one
Butanone
Butanal
Solution
Butanal
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Answer in brief.
Observe the following equation of reaction of Tollens' reagent with aldehyde. How do we know that a redox reaction has taken place? Explain.
\[\ce{R-CHO + 2Ag(NH_{3})^{+}_{2} + OH^{-}->[\triangle] R-CO{O}^{-} + 2Ag↓ + 4NH3 + 2H2O}\]
The product formed after reaction between benzaldehyde and methyl magnesium iodide followed by acid hydrolysis is ____________.
Which of the following is Schiff's reagent?
Identify the INCORRECT reaction.
Identify B in the following reaction,
\[\ce{Acetaldoxime ->[Na][alcohol] A ->[NaNO2][HCl] B + H2O + N2\uparrow}\]
If acetaldehyde is treated with Fehling's solution, the change that occurs in the system is ____________.
Compounds of general formula, are called ____________.
\[\begin{array}{cc} \phantom{...}\ce{R}\phantom{....}\ce{OR''}\phantom{}\\ \phantom{}\backslash\phantom{..}/\\ \ce{C}\\ \phantom{}/\phantom{..}\backslash\\ \phantom{...}\ce{R'}\phantom{...}\ce{OR''}\phantom{} \end{array}\]
Acetone on Clemmensen reduction gives ____________.
The compound which does NOT undergo haloform reaction is ____________.
The number of α-H atoms in butanal is ____________.
Which of the following carbonyl compounds does NOT undergo aldol condensation?
Which of the following does NOT give yellow precipitate when reacted with (NaOH + I2) mixture?
Predict the product Z in the following series of reactions.
\[\ce{Ethanoic acid ->[PCl5] X ->[C6H6][Anhydrous AlCl3] Y ->[i) CH3MgBr][H3O^+] Z}\]
\[\ce{Ethanoic acid ->[P/Br2] 2-bromoethanoic acid}\]. This reaction is called ____________.
Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid.
How is the following conversion effected propanal into butanone?
How is the following conversion effected phenyl methanal into benzoin?
Complete the following reaction.
\[\begin{array}{cc}
\ce{CH3 - CH2 - CH2 - C - CH3 ->[HO - CH2 - CH2 - CH2 - OH][dry HCl] ?}\\
||\phantom{.........}\\
\ce{O}\phantom{.........}
\end{array}\]
How will you prepare acetamide from methyl cyanide?
How will you prepare acetophenone from acetyl chloride?
How will you prepare malachite green from benzaldehyde?
How propanal is converted into propane.
The reagent used in Wolf - Kishner reduction is ______.
Which of the following compounds will undergo self-aldol condensation in the presence of cold dilute alkali?
Which of the following is not correctly matched?
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
