HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Important Questions for Chemistry

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 reactions for the following conversions.

Benzene to Benzaldehyde

Draw structure of salicylaldehyde.

Write the name of product formed, when acetone is treated with 2, 4-dinitrophenyl hydrazine.

What is the action of sodium hypoiodite on acetone?

Write chemical reactions for the following conversions:

Ethyl bromide to ethyl methyl ether.

How ketones are prepared from nitriles?

The product of following reaction is

\[\ce{CH3 - CH = CH - CH2 - CHO ->[i) LiAlH4][ii) H3O+]}\] ______?

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

The product of the following reaction is

\[\begin{array}{cc}
\ce{O}\phantom{.........}\\
||\phantom{.........}\\
\ce{C2H5 - C - CH3 ->[H2/Ni][\Delta] \phantom{..}?}\end{array}\]

Write the chemical reaction involved in Cannizzaro reaction of methanal.

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

How is 1-nitropropane prepared from suitable oxime?

How are  2 - nitropropane prepared from suitable oxime?

Explain the mechanism of esterification

On acid hydrolysis, propane nitrile gives.

Identify the strongest acid amongst the followings:

1. Chloroacetic acid          
2. Acetic acid
3. Trichloroacetic acid
4. Dichloroaceticacid

Explain, why are boiling points of carboxylic acids higher than corresponding alcohols