HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

Write the chemical reaction when hot copper is treated with Vapours of 2° (secondary) alcohol.

Write chemical reaction when hot copper is treated with Vapours of 3° (tertiary) alcohol.

How acetone is prepared from nitriles using Grignard reagent?

How acetone is prepared from nitriles using Grignard reagent?

Write the reaction of Ethanoyl chloride on diethylamine.

Write the reaction of Ethanoyl chloride on diethylamine.

Explain: Phenols are acid while alcohol is neutral.

What is the action of hydrochloric acid on the following ?

\[\ce{NH3}\]

What is the action of hydrochloric acid on the following ? 

\[\ce{Na2CO3}\]

Convert the following:

acetaldehyde to isopropyl alcohol.

Write the chemical reaction when chlorine reacts with dry slaked lime.

The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.

Write the sign convention of work done during expansion of gas.

Henry's constant for \[\ce{CH3Br_{(g)}}\] is 0.159 mol dm⁻³ bar⁻¹ 25°C. Calculate its solubility in water at 25°C, if its partial pressure is 0.164 bar.

Convert the following :

cumene to phenol.

The half-life period for the first order reaction is 1.7 hrs. How long will it take for 20% of the reactant to disappear?

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

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

What is the action of hydrochloric acid on the NH₃?

What is the action of hydrochloric acid on \[\ce{Na2CO3}\]?