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प्रश्न
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.
\[\ce{R-CHO + 2Ag(NH_{3})^{+}_{2} + OH^{-}->[\triangle] R-CO{O}^{-} + 2Ag↓ + 4NH3 + 2H2O}\]
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उत्तर
When an aldehyde is boiled with Tollens' reagent, it gets oxidized to carboxylate ion and Ag+ ion is reduced to silver (Ag). The oxidation number of carbon in aldehyde increases while the oxidation number of Ag decreases. Hence, this is a redox reaction.
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संबंधित प्रश्न
Answer in brief.
What is the action of hydrazine on cyclopentanone in presence of KOH in ethylene glycol?
Addition of sodium bisulphite to ethanol is ____________ type of reaction.
Write a reaction to distinguish acetaldehyde from acetone.
\[\begin{array}{cc} \phantom{...}\ce{R}\phantom{.................}\ce{R}\phantom{..}\ce{H}\phantom{................}\\ \phantom{...}\backslash\phantom{..................}\backslash/\phantom{..........}\phantom{.......}\\ \ce{C = O ->[H2NNH2][KOH/glycol] C + N2 + H2O}\\ \phantom{}/\phantom{............}\phantom{.......}/\phantom{}\backslash\phantom{...............}\\ \phantom{}\ce{R}\phantom{..................}\ce{R}\phantom{..}\ce{H}\phantom{...............} \end{array}\]
Reaction is called ____________.
Which of the following does not give yellow solid on treatment with sodium hypoiodlte?
In Clemmensen's reaction, ketone gives ____________.
The compound which does NOT undergo haloform reaction is ____________.
The first oxidation product of secondary alcohols is ____________.
Which of the following is Clemmensen reduction?
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Predict the product Z in the following series of reactions.
\[\ce{Ethanoic acid ->[PCl5] X ->[C6H6][Anhydrous AlCl3] Y ->[i) CH3MgBr][H3O^+] Z}\]
Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ____________.
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ____________.
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\[\ce{CH3COCH2CH2COOC2H5 ->[CH3MgBr] X ->[H3O^+] Y}\]
How will you convert benzaldehyde into the following compound?
Benzophenone
How will you convert benzaldehyde into the following compound?
α-hydroxy phenyl acetic acid
How is the following conversion effected Hex-3-yne into hexan-3-one?
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How is the following conversion effected phenyl methanal into benzoin?
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How will you prepare malachite green from benzaldehyde?
Which of the following compound will give positive iodoform test?
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 compounds does not undergo a haloform reaction?
A carbonyl compound A having molecular formula C5H10O forms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.
Write the structure of the products obtained from the following ketones by action of hydrazine in presence of a slightly acidic medium.
What is IUPAC name for
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