HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Carbolic acid is ____________.

Which one of the following will react with phenol to give salicylaldehyde after hydrolysis.

\[\ce{(CH3)3 - C - CH(OH) CH3 ->[con H2SO4] X (major product)}\]

Assertion: Phenol is more acidic than ethanol.

Reason: Phenoxide ion is resonance stabilized.

In the reaction \[\ce{Ethanol ->[PCl5] X ->[alc. KOH] Y ->[H2SO4/H2O][298 K] Z}\]. The ‘Z’ is

The reaction can be classified as

Isopropyl benzene on air oxidation in the presence of dilute acid gives ___________.

Assertion: Phenol is more reactive than benzene towards electrophilic substitution reaction

Reason: In the case of phenol, the intermediate arenium ion is more stabilized by resonance.

HO CH₂ CH₂ – OH on heating with periodic acid gives ____________.

Which of the following compound can be used as antifreeze in automobile radiators?

The reaction is an example of

One mole of an organic compound (A) with the formula C₃H₈O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is ___________.

Among the following ethers which one will produce methyl alcohol on treatment with hot HI?

On reacting with neutral ferric chloride, phenol gives ____________.

Identify the product(s) is/are formed when 1-methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.

Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.

Suggest a suitable reagent to prepare secondary alcohol with the identical group using a Grignard reagent.

What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

Predict the major product, when 2-methyl-but-2-ene is converted into alcohol in the following method.

Acid catalysed hydration

Predict the major product, when 2-methyl-but-2-ene is converted into alcohol in the following method.

Hydroboration