HSC Science Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Chemistry

Predict the product Z in the following series of reactions.

\[\ce{Ethanoic acid ->[PCl5] X ->[C6H6][Anhydrous AlCl3] Y ->[i) CH3MgBr][H3O^+] Z}\]

Assertion: 2, 2-dimethyl propanoic acid does not give HVZ reaction.

Reason: 2-2, dimethyl propanoic acid does not have α-hydrogen atom.

Which of the following represents the correct order of acidity in the given compounds.

\[\ce{Benzoic acid ->[i) NH3][ii) \Delta] A ->[NaOBr] B ->[NaNO2/HCl] C}\] ‘C’ is:

\[\ce{Ethanoic acid ->[P/Br2] 2-bromoethanoic acid}\]. This reaction is called ____________.

\[\ce{CH3Br ->[KNC] (A) ->[H3O^+] (B) ->[PCl5] (C)}\] product (C) is:

‘B’ is:

Identify the product formed in the reaction.

In which case, chiral carbon is not generated by reaction with HCN.

Assertion: p-N, N-dimethyl amino benzaldehyde undergoes benzoin condensation

Reason: The aldehydic (−CHO) group is meta directing.

Which one of the following reaction is an example of disproportionation reaction.

Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid.

Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ____________.

In which of the following reactions new carbon-carbon bond is not formed?

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ____________.

Identify X and Y.

\[\ce{CH3COCH2CH2COOC2H5 ->[CH3MgBr] X ->[H3O^+] Y}\]

Identify A, B and C.

Identify A, B, C and D.

\[\ce{ethanoic acid ->[SOCl2] A ->[Pd/BaSO4] B ->[NaOH] C ->[][\Delta] D}\]

How will you convert benzaldehyde into the following compound?

Benzophenone

How will you convert benzaldehyde into the following compound?

Benzoic acid