Download App

Aldehydes, Ketones, and Carboxylic Acids — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryAldehydes, Ketones, and Carboxylic Acids2 Marks
Question
An organic compound with the molecular formula $\ce{C_9H_{10}O}$ forms $2,4-\ce{DNP}$ derivative, reduces Tollens’ reagent and undergoes Cannizzaro reaction. On vigorous oxidation, it gives $1, 2-$ benzenedicarboxylic acid. Identify the compound.
✓

Answer

It is given that the compound $($with molecular formula $\ce{C_9H_{10}O)}$ forms $2, 4-\ce{DNP}$ derivative and reduces Tollen's reagent.
Therefore, the given compound must be an aldehyde.
Again, the compound undergoes cannizzaro reaction and on oxidation gives $1, 2- $ benzenedicarboxylic acid.
Therefore, the $-\ce{CHO}$ group is directly attached to a benzene ring and this benzaldehyde is or tho $-$ substituted.
Hence, the compound is $2-$ ethylbenzaldehyde.

The given reactions can be explained by the following equations.

 

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Aldehydes, Ketones, and Carboxylic Acids→Aldehydes, Ketones, and Carboxylic Acids — all question types→Chemistry STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

If the density of some lake water is $1.25\ g\ mL^{-1}$ and contains $92\ g$ of $Na^+$ ions per kg of water, calculate the molarity of $Na^+$ ions in the lake.
→
Arrange the following in decreasing order of their acidic strength and give reason for your answer.
$\ce{CH_3CH_2OH, CH_3COOH, ClCH_2COOH, FCH_2COOH, C_6H_5CH_2COOH}$
→
What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?
→
Consider a certain reaction $A \rightarrow$ Products with $k = 2.0 \times 10^{–2}s^{–1}$. Calculate the concentration of $A$ remaining after $100 s$ if the initial concentration of $A$ is $1.0\ mol\ L^{–1}.$
→
If the density of some lake water is $1.25 g mL^{–1}$ and contains $92 g$ of $Na^+$​​​​​​​ ions per $\ kg$ of water, calculate the molality of $Na^+$​​​​​​​ ions in the lake.
→
Write the mechanism of the following reaction :
Image
→
Give simple chemical terts to distinguish between the pair of compound :
Phenol and Benozoic acid
→
What are essential and non-essential amino acids in human food? Give one example of each type.
→
Calculate the $Zn-Cu$ cell potential. $\#\#\#$ Calculate standard cell potential of Daniell cell.
→
Arrange the following in the decreasing order of their acidic character.
  1. $\ce{C_6H_5COOH, FCH_2COOH, NO_2CH_2COOH}$
  2. $\ce{CH_3CH_2OH, CH_3COOH, ClCH_2COOH, FCH_2COOH, C_6H_5CH_2COOH}$
→