Alcohols & phenols & ethers practice · Easy

Option D (${\mathrm{C}_6}{\mathrm{H}_5}\mathrm{OH}$) is correct because carbolic acid is the common name for phenol, which has the formula ${\mathrm{C}_6}{\mathrm{H}_5}\mathrm{OH}$.

Option D is correct because ethyl alcohol is commonly denatured by adding methanol (CH3OH) and pyridine to make it unfit for human consumption.

Option D (Pyridinium chlorochromate) is correct because PCC is a mild oxidizing agent that selectively oxidizes alcohols to ketones without affecting alkenes.

Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because aldehydes do indeed reduce to primary alcohols.

Option A (Butyne-1, 4-diol) is correct because acetylene reacts with formaldehyde in the presence of copper acetylide to form Butyne-1,4-diol via ethinylation.

The correct answer is C (Solvent in preparing varnishes) because denatured spirit, primarily ethanol, is an effective solvent for resins and other components of varnishes.

Option B (Phenols) is correct because the phthalein test is a characteristic test for phenols.

Option A ($\mathrm{CH_3OH}$) is correct because methanol ($\mathrm{CH_3OH}$) is manufactured from water gas (CO + H2).

Option A (2-chloro-2-methylbutane) is correct because the reaction proceeds via a carbocation rearrangement to form a more stable tertiary carbocation, which then reacts with chloride ion.

Option A (Picric acid) is correct because picric acid (2,4,6-trinitrophenol) is a phenol and does not contain a carboxyl group (-COOH).

Option A (Oxidation, chlorination) is correct because in step-1, chlorine acts as an oxidizing agent, and in step-2, it acts as a chlorinating agent.

Option D (Reimer-Tiemann reaction) is correct because the reaction of phenol with chloroform in the presence of NaOH to form salicylaldehyde is the Reimer-Tiemann reaction.

Option A (Exothermic) is correct because fermentation is a process that releases energy in the form of heat.

Option B ($o -$nitrophenol) is correct because it has intramolecular hydrogen bonding, which reduces intermolecular forces and lowers the boiling point.

Option D ($ZnO - C{r_2}{O_3}$) is correct because a mixture of zinc oxide and chromium(III) oxide is used as a catalyst in the synthesis of methanol from carbon monoxide and hydrogen.

Option C (Ethanol) is correct because ethanol, a compound containing a hydroxyl group, is commonly used as a solvent in wood polishes.

Option C ($1^{\circ}, 2^{\circ}$ and $3^{\circ}$ alcohols) is correct because the Lucas test, using Lucas reagent (anhydrous $ZnCl_2$ and HCl), differentiates between primary, secondary, and tertiary alcohols based on the rate of formation of alkyl halides.

Option C ($\mathrm{CH_3OH}$) is correct because carbinol is the trivial name for methanol ($\mathrm{CH_3OH}$).

Option C ($\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}+\mathrm{C}_2 \mathrm{H}_5 \mathrm{ONa}$) is correct because Williamson's ether synthesis involves the reaction of a primary alkyl halide with an alkoxide.

Option C (Fermentation) is correct because fermentation by Acetyl bacilli is the process used to obtain acetic acid from ethyl alcohol.

Option B (Phenol) is correct because Carbolic acid is a common name for Phenol (${\mathrm{C}_6}{\mathrm{H}_5}\mathrm{OH}$).