HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

What is the action of following on ethyl bromide?

\[\ce{Mg}\] in dry ether

Write chemical reactions for the following conversions:

Bromobenzene to toluene.

The formula for the Grignard's reagent is ______.

Draw geometric isomers of the following complex.

Geometrical isomers of Pt(NH₃)₂Cl₂

Write the structure of HClO₄.

Answer the following in one or two sentences.

What is the standard cell potential for the reaction?

\[\ce{2Al(s) + 3Ni^{2⊕}(1M) -> 2Al^{3⊕}(1 M) + 3Ni(s)}\]

if \[\ce{E{^{\circ}_{Ni}}}\] = −0.25 V and \[\ce{E{^{\circ}_{Al}}}\] = −1.66 V?

The relation between the radius of the sphere and the edge length in the body-centred cubic lattice is given by the formula ______.

Write the name of the technique used to know geometry of nanoparticles.

Calculate the mole fraction of solute, if the vapour pressure of pure benzene at a certain temperature is 640 mmHg and the vapour pressure of a solution of a solute in benzene is 600 mmHg.

Write the chemical reaction for the following:

Chlorobenzene is heated with fuming H₂SO₄.

Write the structure of the product formed when chlorobenzene is treated with sodium metal in the presence of dry ether.

Draw the structure of the following compound:

Peroxy disulphuric acid

Define Distereoisomers.

Give cis isomer of [Co(NH₃)₄Cl₂]^⊕.

Give trans isomer of [Co(NH₃)₄Cl₂]^⊕.

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

Answer the following in one sentence :

Why is it necessary to add H₂ SO₄ while preparing the solution of CuSO₄?

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

Answer the following in one sentence:

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

Give the following named reaction.

Fittig reaction