HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

Write the product formed during Chlorobenzene treated with a cone. HNO₃ in the presence of a cone. H₂SO₄ reaction.

Write the product formed by Chlorobenzene treated with a fuming H₂SO₄ reaction.

Write the product formed Anisole treated with HI reaction.

Define organometallic compound.

Write the product in the following reaction:

Bromobenzene reacts with methyl bromide and sodium metal in presence of dry ether.

Write the product in the following reaction:

Chlorobenzene reacts with sodium metal in presence of dry ether.

Write the four applications of emf series.

Why is it necessary to add H₂SO₄ while preparing the solution of CuSO₄?

Why is it necessary to add H₂SO₄ while preparing the solution of CuSO₄?

What is nano material? 

What is the action of following on ethyl bromide?

silver nitrite

Write the reaction involved in sol-gel process during hydrolysis.

Among dimethylamine (pK_b = 3.27) and diethylamine (pK_b = 3.0), which one is more basic?

Draw the structure of peroxymonosulphuric acid. 

What are enzymes?

Why is it necessary to add \[\ce{H2SO4}\] while preparing the solution of \[\ce{CuSO4}\]?

Answer the following in one sentence:

Why is it necessary to add \[\ce{H2SO4}\] while preparing the solution of \[\ce{CuSO4}\]?

Answer the following in one sentence:

Why is it necessary to add \[\ce{H2 SO4}\] while preparing the solution of \[\ce{CuSO4}\]?

Why is it necessary to add \[\ce{H2SO4}\] while preparing the solution of \[\ce{CuSO4}\]?

Answer the following in one sentence:

Why is it necessary to add H₂SO₄ while preparing the solution of CuSO₄?