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

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.

Formulate the galvanic cell in which the following reaction occurs.

2Al(S) + 3Cu²⁺(aq) → 2Al³⁺(aq) + 3Cu(S)

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

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

Explain the geometrical isomerism of the octahedral complex of the type [M(AA)₂B₂]^n± with a suitable example.

Define hydrolysis.

Which one of the following salts does not hydrolyse in water?

Draw the structure of oxyacid of sulphur in which the oxidation state of sulphur is + 4.

How is chlorine obtained by oxidation of HCl. Write the reactions using two oxidizing agents.

Construct a cell from Ni2+ | Ni and Cu2+ | Cu Cu half cells. Write the cell reaction and calculate `E_("cell")^0`   
`(E_("Ni")^0 = - 0.236  V and E_("Cu")^0 = + 0.337  V)`

A salt of strong acid and strong base does not undergo hydrolysis. Explain.

Give an example of a salt of weak acid and weak base.

The half-lives of a first-order reaction are 1.19s at 313 K and 15.45s at 293 K. Calculate the energy of activation.

Draw the structure of propanone and indicate its polarity.

The unit of rate constant of zero order reaction is ______.