Aldehydes, Ketones and Carboxylic Acids

The correct structure of 2, 6-Dimethyl-dec-4-ene is :

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

RMgX + CO₂ --(dry ether)--> Y --(H₃O⁺)--> RCOOH

What is Y in the above reaction?

Match List -I with List -II.

List -I
(Products formed)
(a) Cyanohydrin
(b) Acetal
(c) Schiff's base
(d) Oxime

List-II
(Reaction of carbonyl compound with)
(i) NH?OH
(ii) RNH?
(iii) alcohol
(iv) HCN

Choose the correct answer from the options given below:

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:

The product "P" in the above reaction is:

In the above reaction, the reagent "A" is:

In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula [Ag(NH?)?]? per aldehyde group to form silver mirror is ________. (Round off to the nearest integer).

Kindly consider the following