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

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:

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

Write structure of adipic acid.

How ketones are prepared from nitriles?

How propanal is converted into propane.

Ozonolysis of 2, 3 dimethyl but-2-ene, followed by decomposition by Zn dust and water gives ______.

The product of hydrolysis of propyne in the presence of 1% \[\ce{HgSO4}\] and 40% \[\ce{H2SO4}\] is ______.

Write preparation of propanone by using ethanoyl chloride and dimethyl cadmium.

How are ketones classified?