Give the best conditions for this transformation:

$CH_3-CHO \xrightarrow{NaOH + Cl_2} A + HCOONa$. Product $A$ can be used as:

The product obtained as a result of the reaction between acetone and chloroform is used as:

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:

In the given reaction,
$Cyclohexanone \xrightarrow[(ii) \text{ heat}]{(i) \text{ } OH^-} 'P'$
The number of $\pi$ electrons present in the product $'P'$ is $....$

Which of the following will give $-ve$ Tollen's but $+ve$ Iodoform test?