Alcohols & phenols & ethers practice · Mixed difficulty

Assertion: Phenol undergo Kolbe reaction, ethanol does not.

Reason: Phenoxide ion is more basic than ethoxide ion.

If methanol vapour is passed over heated copper at ${300^ \circ }C$, it forms formaldehyde by:

Anisole is the product obtained from phenol by the reaction known as

Assertion: Addition of water to but-1-ene in acidic medium yields butan-1-ol.

Reason: Addition the formation of primary carbocation.

Esterification of alcohols involves:

How many structural isomers are known for ${\mathrm{C}_4}{\mathrm{H}_{10}}\mathrm{O}$ ?

Phenol gives characteristic colouration with

Which of the following alcohol gives an alkyl halide on simply shaking with $HCl$ at room temperature?

When ethyl alcohol is dissolved in water, it is accompanied with:

Alcoholic fermentation of sugar gives 3% glycerol. The yield can be increased to 25% if fermentation is made in presence of:

Which compound is formed when sodium phenoxide is heated with ethyl iodide?

Alkyd resins, made of glycerol are used:

The ease of dehydrohalogenation of alkyl halide with alcoholic KOH is

An aqueous solution of ethyl alcohol:

An alcohol is not oxidised in alkaline or neutral solution but in acidic solution it is turned first to acetone and then to acetic acid. It is a:

When acetyl chloride is reduced with $\mathrm{LiAl}{\mathrm{H}_4}$, the product formed is:

2 mole of ethanol are burnt. The amount of $\mathrm{C}{\mathrm{O}_2}$ obtained will be:

Increasing order of acid strength among $p -$methoxyphenol, $p -$methylphenol and $p -$nitrophenol is:

Which of the following ethers is the most unreactive to cleavage with $H B r$ ?

Which is true about this reaction?

Assertion: Methanol is called wood spirit.

Reason: Methanol can be prepared by the destructive distillation of fresh wood.

Nobel’s oil is:

Among the following compounds, the strongest acid is:

Assertion : Reimer-Tiemann reaction of phenol with ${CCl}_4$ in ${NaOH}$ at $340 {~K}$ gives salicyclic acid as the major product.

Reason: The reaction occurs through intermediate formation of dichlorocarbene.

Terylene is formed by the reaction of one of the following alcohols:

Bisphenol A is

An organic compound $X$ on treatment with PCC in dichloromethane gives the compound $Y.$ Compound $Y$ reacts with $I_2$ and alkali to form yellow precipitate of triiodomethane. The compound ${X}$ is

Which one of the following compounds will not react with $\mathrm{C}{\mathrm{H}_3}\mathrm{MgBr}$?

Which of the following statements are correct?

(i) In phenols, the $-{OH}$ group is attached to $s p^2$ hybridised carbon of an aromatic ring

(ii) The carbon - oxygen bond length (136 pm) in phenol is slightly more than that in methanol

(iii) Partial double bond character is due to the conjugation of unshared electron pair of oxygen with the aromatic ring.

(iv) $s p^2$ hybridised state of carbon to which oxygen is attached.

The compound $\mathrm{C}{\mathrm{H}_3}\mathrm{C}{\mathrm{H}_2}\mathrm{C}{\mathrm{H}_2}\mathrm{Br}$ is converted into $\mathrm{C}{\mathrm{H}_3}\mathrm{C}{\mathrm{H}_2}\mathrm{C}{\mathrm{H}_2}\mathrm{OH}$ by: