Science (English Medium) कक्षा १२ - CBSE Important Questions

Predict the products of the following reactions :

Draw the structures of major monohalo products in each of the following reactions :

Write the products formed when CH₃CHO reacts with the following reagents : HCN

Write the products formed when CH₃CHO reacts with the following reagents : H₂N – OH

Write the products formed when CH₃CHO reacts with the following reagents: CH₃CHO in the presence of dilute NaOH

Account for the following : Cl – CH₂COOH is a stronger acid than CH₃COOH.

Out of CH₃CH₂ – CO – CH₂ – CH₃ and CH₃CH₂ – CH₂ – CO – CH₃, which gives iodoform test?

An organic compound (A) (molecular formula C₈H₁₆O₂) was hydrolysed with dilute sulphuric acid to give a carboxylic acid (B) and an alcohol (C). Oxidation of (C) with chromic acid produced (B). (C) on dehydration gives but-1-ene. Write equations for the reactions involved.

Give a simple chemical test to distinguish between the following pair of compounds:

Benzaldehyde and Acetophenone

How will you bring about the following conversion in not more than two steps?

Ethanol to 3-Hydroxybutanal

Complete the synthesis by giving missing starting material, reagent or product.

Write the product(s) in the following reactions

Write the equations involved in the following reactions :

Wolff-Kishner reduction

Account for the following:

Carboxylic acid is a stronger acid than phenol.

Write the chemical equations to illustrate the following name reactions:

Aldol condensation

Give the IUPAC name of the following compound.

CH₃ − CH = CH − CHO

Complete the following:

\[\ce{CH3CN ->[1. AlH(i - Bu)2][2. H2O] 'A' ->[H2N-OH][H^+] 'B'}\]

Write IUPAC name of the following compound:

Convert the following:

Propan-1-ol to 2-Bromopropanoic acid

Convert the following:

Acetaldehyde to But-2-enal