HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Important Questions for Chemistry

Identify ‘A' and ‘B’ in the following reaction :

C₆H₅MgBr + C0₂ `(`> ‘A’   `(PCl_5)/()`> ‘B’

Show how the following compound can be converted to benzoic acid.

Phenylethene (Styrene)

Write a note on ‘aldol condensation’.

What is the action of phenyl hydrazine on propanone?

How is methoxy benzene prepared from carbolic acid?

What is the action of Zn – Hg / conc. HCl on propanone?

What is the action of Sodium bisulphite on propanone?

Write only reactions for the preparation of benzophenone from benzonitrile.

How will you convert calcium acetate to acetaldehyde?

What is the action of following reagents on glucose?
1. Bromine water
2. Hydroxylamine

The functional group present in triacylglycerol is _______.

Answer the following in one sentence.

Write reaction showing conversion of ethanenitrile into ethanol.

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.