HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Important Questions

Answer in brief.

What is the action of hydrazine on cyclopentanone in presence of KOH in ethylene glycol?

Write a note on Stephen reaction.

Write reaction showing aldol condensation of cyclohexanone.

Answer in brief.

Write reaction showing conversion of Acetaldehyde into acetaldehyde dimethyl acetal.

Ketones CANNOT be converted into carboxylic acid using _____________

The following reactants CANNOT be converted into carboxylic acid?

Write the number of products when a mixture of ethanal and propanal is reacted with dilute alkali?

Carboxylic acids have higher boiling points than those of ethers. Give reason.

What is the action of following on proponal?

Hydroxyl amine

What is the action of following on proponal?

Hydrazine

What is the action of following reagents on ethanoic acid?

SOCl₂/heat

What is the action of following reagents on ethanoic acid?

sodalime/heat

What is the action of following reagents on ethanoic acid?

P₂O₅/heat

Write a reaction for the following conversion.

Benzene to Benzaldehyde.

Explain haloform reaction with suitable example.

Draw structure of salicylaldehyde.

Write reaction for preparation of acetophenone from benzoyl chloride.

Write reactions for the action of the following reagents on p-chlorobenzaldehyde.

Ethane-1,2-diol in presence of dry HCl.

How will you prepare acetic anhydride from acetic acid?

Identify A and B from the following reaction:

\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{....................}\\
\phantom{}\ce{2CH3 - C = O ->[Ba(OH)2] A ->[Δ] B + H2O}
\end{array}\]