Test: Reactions of Alcohols, Phenols(27 Nov) - JEE MCQ

Electron donating (+ / -effect) alkyl groups decreases the acidic strength.

Greater the number of hydroxy groups , greater its a bility to form H-bonds with water, hence greater solubility.

Both (I) and (II) are 2° alcohols, less acidicthan (I) and (IV) where there is electron withdrawing chloride group is present. Between (I) and (II), (I) is less acidic as ring is considered here equivalent to two ethyl groups attached to α-carbon. (Ill) is more acidic than (IV) because in (III) Cl is at α-carbon while it is at β-carbon in (IV).

Dihydric alcohols are always more soluble in water than monohydric alcohol. Between (I) and (II), (I) is more soluble as it forms intermolecular H-bonds with water while (II) forms intramolecular H-bonds which decreases its ability to form intermolecular H-bonds with water.

Phenol forms salt with NaOH while a liphatic alcohols do not.

In the below reaction , no bond with chiral carbon is disturbed, hence, configuration is retained in product.

 Phenolic—OH is neutralised here

Methanol is a liquid chemical with the formula CH3​OH. It is colourless, volatile, flammable and poisonous.

Methanol is made from the destructive distillation of wood and is chiefly synthesized from carbon monoxide and hydrogen.

It is more acidic compound bc2​ this molecule loss H+ ions very easily. as compared to compound [A]

It reacts very difficult to lucas reagent process via SN1 mechanism which depends on carbocation stability.

It is diacid base loss H+ easily.

No such reaction occur with CH₃OH.
Acidic KMnO₄ forms CO₂ with methanol but CH₃COOH with ethanol.

All these groups increases the stability of gauche conformer due to stable intramolecular H-bonding.