Alcohols, Phenols & Ethers

Assertion (A): Industrial methanol plants operate at ~573-673 K, not at very low temperature despite the exothermic equilibrium being more favourable at lower T. Reason (R): At very low temperature, even with a…

Anisole + CH₃COCl/AlCl₃ $\rightarrow$ Product V + HCl. Major product V is:

Assertion (A): In the Reimer-Tiemann reaction, dichlorocarbene (:CCl₂) reacts preferentially at the ORTHO position of phenoxide, similar to CO₂ in Kolbe's reaction. Reason (R): The electrophilic :CCl₂ attacks the…

In Kolbe's reaction: C₆H₅ONa + CO₂ $\rightarrow$(125$^\circ$C, 4-7 atm)$\rightarrow$ [intermediate] $\rightarrow$(H₃O⁺)$\rightarrow$ salicylic acid CO₂ acts as which type of species?

Attempting Friedel-Crafts acylation of phenol with CH₃COCl/AlCl₃ gives poor yield of ring-acylated product. The main reason:

To obtain MONO-bromophenol selectively (mainly para), which conditions should be used?

Which reagents selectively oxidise a primary alcohol to an ALDEHYDE (not the acid)? Select ALL correct. (A) PCC in CH₂Cl₂ (B) Hot acidified KMnO₄ (excess) (C) Collins reagent (CrO₃·2py, CH₂Cl₂) (D) Dess-Martin…

In the Fischer esterification mechanism, the new C-O bond (between the alcohol O and the carbonyl C of the acid) is formed in which step?

Which sodium salt can be made by treating the compound with aqueous Na₂CO₃? (pKₐ₁ of H₂CO₃ $\approx$ 6.4) Ethanol (pKₐ$\approx$16), phenol (pKₐ$\approx$10), benzoic acid (pKₐ$\approx$4.2)

Ortho-nitrophenol (pKₐ$\approx$7.2) and para-nitrophenol (pKₐ$\approx$7.15) are both more acidic than meta-nitrophenol (pKₐ$\approx$8.4). The best explanation is:

Assertion (A): 4-Nitrophenol (pKₐ$\approx$7.15) is more acidic than phenol (pKₐ$\approx$10.0). Reason (R): The para -NO₂ group (EWG) withdraws electron density from the ring and from O via resonance and induction,…

In the cumene process, autoxidation of cumene (Step 2) selectively attacks which C-H bond first?