Which of the following acids remains unaffected on heating:

The end product of following reaction is:

$\mathrm{Directions} :$ Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.

$\mathrm{Assertion} :$ Acetylene on treatment with alkaline ${\mathrm{KMnO}}_4$ produce acetaldehyde.

$\mathrm{Reason} :$ Alkaline ${\mathrm{KMnO}}_4$ is a reducing agent.

$\mathrm{Directions} :$ Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.

$\mathrm{Assertion} :$ Acetophenone and benzophenone can be distinguished by iodoform test.

$\mathrm{Reason} :$ Acetophenone and benzophenone both are carbonyl compounds.

$\mathrm{Directions} :$ Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.

$\mathrm{Assertion} :$ Hydroxyketones are not directly used in Grignard reaction because

$\mathrm{Reason} :$ Grignard reagent reacts with hydroxyl group.

$\mathrm{Directions} :$ Each of these questions contains an assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
$\mathrm{Assertion} : 2,2-$ Dimethyl propanal undergoes Cannizzaro reaction with concentrated $\mathrm{NaOH}$.

$\mathrm{Reason} :$ Cannizzaro reaction is a disproportionation reaction.

$\mathrm{Directions} :$ Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
$\mathrm{Assertion} :$ Isobutanal does not gives iodoform test.

$\mathrm{Reason} :$ It does not have $\alpha$ -hydrogen

$\mathrm{Directions} :$ Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
$\mathrm{Assertion} :$ Carbonyl compounds take part in nucleophilic addition reactions.

$\mathrm{Reason} :$ These reactions are initiated by nucleophilic attack at the electron deficient carbon atom.

$\mathrm{Directions} :$ Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
$\mathrm{Assertion} :$ Fehling's reagent is used to test for all aliphatic aldehydes.

$\mathrm{Reason} :$ Aliphatic aldehydes can be easily oxidised even with mild oxidising agents like Fehling solution.