When an aldehyde is treated with an excess of monohydric alcohol,what is formed?

Which of the following compounds is not formed in the iodoform reaction of acetone?

Aldol condensation of acetaldehyde involves the formation of which of the following intermediates?

The products $(A)$ and $(B)$ respectively in the above Beckmann rearrangement reactions are:

Which is the most suitable reagent for the following conversion?
$CH_3-CH=CH-CH_2-CO-CH_3 \rightarrow CH_3-CH=CH-CH_2-COOH$

Identify $A$ and $B$ from the following reactions:
$(I)$ $CH_3-CH=CH-CH_3 \xrightarrow{\text{(i) } O_3}{\text{(ii) } Zn-H_2O} 2X$
$(II)$ $2X$ $\xrightarrow[2. \Delta]{1. NaOH \text{ (dil.)}} Z$ $\xrightarrow[\text{(ii) } Zn-H_2O]{\text{(i) } O_3} A + B$