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

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

Give the industrial applications of enzyme catalysis.

Write the reaction when finely divided MnO₂ is heated strongly with KOH and KC1O₃.

Write hydrolysis reaction of iodine trichloride.

Write structures for geometrical isomers of diamminebromochloroplatinum (II).

Obtain a relation, `k_2/k_1 = ((t_(1/2))_2)/((t_(1/2))_1)`, where k₁ and k₂ are rate constants while (t_1/2)₁  and  (t_1/2)₂  are half-life periods of the first order reaction at temperatures T₁ and T₂ respectively. Write the relation for activation energy.

Describe the action of alcoholic potassium hydroxide (alc. KOH) on ethyl bromide

Describe the action of alcoholic potassium hydroxide (alc. KOH) on n-propyl bromide