Aldehydes, Ketones and Carboxylic Acids

Kindly consider the following 

R–CN --(i) DIBAL-H / (ii) H₂O→ R – Y
Consider the above reaction and identify “Y”

The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is

Identify the major product obtained in the following reaction:

CH₃CH₂COO⁻Na⁺ --NaOH,+? Heat--> CH₃CH₃ + Na₂CO₃
Consider the above reaction and identify the missing reagent/chemical.

Which one of the following polymers is prepared by addition polymerization?

The following solutions were prepared by dissolving 10 g of glucose (C₆H₁₂O₆) in 250ml of water (P₁), 10 g of urea (CH₄N₂O) in 250ml of water (P₂) and 10 g of sucrose (C₁₂H₂₂O₁₁) in 250ml of water (P₃). The right option for the decreasing order of osmotic pressure of these solutions is :

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

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 options given below:

Assertion A : Enol form of acetone [CH3COCH3] exists in <0.1% quantity. However, the enol

form of acetyl acetone [CH3COCH2OCCH3] exists in approximately 15% quantity.

Reason R : Enol form of acetylacetone is stabilized by intramolecular hydrogen bonding, which is

not possible in enol form of acetone.

Choose the correct statement: