Aldehydes, Ketones and Carboxylic Acids · Chemistry · NEET

Compound $\mathrm{P}\left(\mathrm{C}_8 \mathrm{H}_8 \mathrm{O}\right)$ gives a red orange precipitate with 2,4-DNP reagent and it does not reduce Fehling's reagent. On drastic oxidation with chromic acid, $P$ gives an aromatic product $Q$ that produces effervescence on treating with aq. $\mathrm{NaHCO}_3$. Compounds P and Q , respectively, are :

$$ \text { Match List I with List II: } $$

Choose the correct answer from the options given below :

In a test tube containing a salt, a few drops of dilute $\mathrm{H}_2 \mathrm{SO}_4$ was added, which gave colourless vapours having the smell of vinegar. The vapours turned the blue litmus paper red.

Identify the correct anion from the following :

Identify the suitable reagent for the following conversion.

The correct order of decreasing acidity of the following aliphatic acids is

Select the incorrect reaction among the following :

Identify the correct reagents that would bring about the following transformation.

Match List I with List II.

	List I (Reaction)		List II (Reagents/Condition)
A.		I.
B.		II.	CrO$$_3$$
C.		III.	KMnO$$_4$$/KOH, $$\Delta$$
D.		IV.	(i) O$$_3$$ (ii) Zn-H$$_2$$O

Choose the correct answer from the options given below:

For the given reaction:

'P' is

Consider the given reaction:

$$\mathrm{CH}_3 \mathrm{COCH}_3 \stackrel{\text { dil } \mathrm{Ba}(\mathrm{OH})_2}{\longrightarrow} \text { ''X" }$$

The functional groups present in compound "$$\mathrm{X}$$" are:

Identify 'X' in above reactions

The following conversion is known as:

Reagents which can be used to convert alcohols to carboxylic acids, are

(A) $$\mathrm{CrO}_3-\mathrm{H}_2 \mathrm{SO}_4$$

(B) $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+\mathrm{H}_2 \mathrm{SO}_4$$

(C) $$\mathrm{KMnO}_4+\mathrm{KOH} / \mathrm{H}_3 \mathrm{O}^{+}$$

(D) $$\mathrm{Cu}, 573 \mathrm{~K}$$

(E) $$\mathrm{CrO}_3,\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O}$$

Choose the most appropriate answer from the options given below :

The major product formed in the following conversion is ___________.

Complete the following reaction:

[C] is _______.

Identify the major product obtained in the following reaction:

Identify the final product [D] obtained in the following sequence of reactions.

Which of the following reactions is not an example for nucleophilic addition-elimination reaction?

The product formed from the following reaction sequence is

Match List-I with List-II :

Choose the correct answer from the options given below :

The incorrect method to synthesize benzaldehyde is

Given below are two statements :

Statement I : The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole - dipole interactions.

Statement II : The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding.

In the light of the above statements, choose the most appropriate answer from the given below

RMgX + CO₂ $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{ether}^{dry}} $$ Y $$\buildrel {{H_3}{O^ + }} \over \longrightarrow $$ RCOOH

What is Y in the above reaction?

Match List-I with List-II.

Choose the correct answer from the options given below

Compound X on reaction with O₃ followed by Zn/H₂O gives formaldehyde and 2-methyl propanal as products. The compound X is

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?