Aldehydes are isomeric with:

Match the $IUPAC$ name of the carbonyl compound in Column-$I$ with its structure in Column-$II$ and its common name in Column-$III$.

Column-$I$ ($IUPAC$ name)	Column-$II$ (Structure)	Column-$III$ (Common name)
$A. 4$-oxopentanal	$i. CH_3CH_2CH_2CH_2CHO$	$p. \text{Acetyl acetone}$
$B. \text{Ethane-}1,2\text{-dial}$	$ii. CH_3COCH_2CH_2CHO$	$q. \text{Valeraldehyde}$
$C. \text{Pentane-}2,4\text{-dione}$	$iii. CHOCHO$	$r. \beta\text{-acetyl propionaldehyde}$
$D. \text{Pentanal}$	$iv. CH_3COCH_2COCH_3$	$s. \text{Glyoxal}$

What is the general molecular formula of aldehydes?

In aldehydes and ketones,the carbon atom of the carbonyl group is

Which of the following is correctly matched according to their common names?

In column-$I$,diagrams of the carbonyl group are given,and in column-$II$,their descriptions are given. Match column-$I$ with the correct option given in column-$II$.
| Column-$I$ (Drawing diagram) | Column-$II$ (Description) |
| :--- | :--- |
| $(A)$ Resonance structures of carbonyl group | $(i)$ In carbon-oxygen,$\pi$-electron clouds are present on the upper and lower parts of the plane. |
| $(B)$ Geometry of carbonyl group | (ii) Non-bonding $2p$ orbital which is not taking part in hybridization of carbonyl carbon and $2p$ orbital of oxygen containing one electron are parallel to each other and perpendicular to the plane. |
| $(C)$ $\sigma$-bonding in carbonyl group | (iii) Hybridization of carbonyl carbon is $sp^2$ and it has a planar triangular structure and bond angle approximately $120^{\circ}$. |
| $(D)$ $\pi$-bonding in carbonyl group | (iv) Two hybrid structures of the carbonyl group indicate that the carbon-oxygen bond is polar in nature and also the carbon atom is an electrophilic centre and the oxygen atom is a nucleophilic centre. |