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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Choose the most correct option. Benzaldehyde does NOT show positive test with ______. - Chemistry

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प्रश्न

Choose the most correct option.

Benzaldehyde does NOT show positive test with ______.

पर्याय

  • Schiff reagent

  • Tollens' reagent

  • Sodium bisulphite solution

  • Fehling solution

MCQ

उत्तर

Benzaldehyde does NOT show positive test with Fehling solution.

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Chemical Properties of Aldehydes and Ketones
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पाठ 12: Aldehydes, Ketones and Carboxylic acids - Exercises [पृष्ठ २८०]

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बालभारती Chemistry [English] 12 Standard HSC
पाठ 12 Aldehydes, Ketones and Carboxylic acids
Exercises | Q 1.6 | पृष्ठ २८०

संबंधित प्रश्‍न

_____________ reaction is used to synthesize straight alkyl substituted benzenes.


Write a reaction to distinguish acetaldehyde from acetone


Write reactions for the action of the following reagents on p-chlorobenzaldehyde.

Tollen’s reagent


Benzaldehyde gives all tests positive EXCEPT ____________.


Which of the following compounds does NOT undergo aldol condensation?


\[\begin{array}{cc} \phantom{...}\ce{R}\phantom{.................}\ce{R}\phantom{..}\ce{H}\phantom{................}\\ \phantom{...}\backslash\phantom{..................}\backslash/\phantom{..........}\phantom{.......}\\ \ce{C = O ->[H2NNH2][KOH/glycol] C + N2 + H2O}\\ \phantom{}/\phantom{............}\phantom{.......}/\phantom{}\backslash\phantom{...............}\\ \phantom{}\ce{R}\phantom{..................}\ce{R}\phantom{..}\ce{H}\phantom{...............} \end{array}\]

Reaction is called ____________.


Which of the following is Clemmensen reduction?


Which of the following is a Wolf - Kishner reduction?


Which of the following reagents is used for the following conversion?

\[\ce{CH3 - CH = CH - CHO -> CH3 - CH = CH - CH2OH}\]


The formation of cyanohydrin from acetone is an example of ____________.


Which of the following represents the correct order of acidity in the given compounds.


‘B’ is:


Assertion: p-N, N-dimethyl amino benzaldehyde undergoes benzoin condensation

Reason: The aldehydic (−CHO) group is meta directing.


Identify X and Y.

\[\ce{CH3COCH2CH2COOC2H5 ->[CH3MgBr] X ->[H3O^+] Y}\]


Identify A, B and C.


Identify A, B, C and D.

\[\ce{ethanoic acid ->[SOCl2] A ->[Pd/BaSO4] B ->[NaOH] C ->[][\Delta] D}\]


How will you convert benzaldehyde into the following compound?

Benzophenone


How is the following conversion effected Hex-3-yne into hexan-3-one?


How will you prepare benzoic acid from toluene?


The reagent used in Wolf - Kishner reduction is ______.


Which one of the following substituents at para-position is most effective in stabilizing the phenoxide  ion?


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 ______.


In the above reaction, product (B) is:


What is the number of different products formed when mixture of ethanal and propanal reacts with aq. NaOH after warming?


Which of the following compounds does not undergo a haloform reaction?


Aldehydes are readily oxidised to yield carboxylic acids but ketones are inert to oxidation. Which is the most likely explanation regarding this difference in reactivity?


Identify B in the following reaction:

\[\begin{array}{cc}
\ce{O}\phantom{........}\\
||\phantom{........}\\
\ce{\underset{(Acetone)}{CH3 - C - CH3}->[CrO3] B}
\end{array}\]


How will you prepare Acetic anhydride from acetic acid.


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