HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Important Questions for Chemistry

Define the following terms: Molar conductivity (⋀_m)

Define the following terms: Secondary batteries

On passing 1.5 F charge, the number of moles of aluminium deposited at cathode are _______ [Molar mass of Al = 27 gram mol^–1]

(A) 1.0

(B) 13.5

(C) 0.50

(D) 0.75

Write any two uses of H₂SO₄

In the representation of the galvanic cell, the ions in the same phase are separated by a _______.

10.0 grams of caustic soda when dissolved in 250 cm³ of water, the resultant gram molarity of solution is _______.

(A) 0.25 M

(B) 0.5 M

(C) 1.0 M

(D) 0.1 M

Construct a labelled diagram for the following cell:

`Zn|Zn^(2+)(1M)||H^+(1M)|H_(2(g,1atm))|Pt`

Write the cell representation and calculate equilibrium constant for the following redox reaction:

`Ni_((s))+2Ag_((aq))^+ (1M)->Ni_((aq))^(2+)(1M)+2Ag_((s)) " at "25^@ C`

`E_(ni)^+`=-0.25V and `E_(Ag)^+=0.799V`

Write any ‘two’ advantages of calomel electrode. 

Potential of saturated calomel electrode is-

Write the Nernst equation and explain the terms involved.

Draw neat labelled diagram of electrolytic refining of blister copper

The conductivity of 0.02M AgNO₃ at 25°C is 2.428 x 10^-3 Ω^-1 cm^-1. What is its molar
conductivity?

What is the ratio of volumes of H2 and O2 liberated during electrolysis of acidified water?

(A) 1 : 2

(B) 2 : 1

(C) 1 : 8

(D) 8 : 1

Explain Faraday’s second law of electrolysis

Define entropy.

Write electrode reaction and net cell reaction for fuel cell. Calculate e.m.f. of the following cell at 25 °C.

Standard reduction potential (SRP) of Zn and Cu are − 0.76 V and 0.334 V respectively

Write mathematical expression of molar conductivity of the given solution at infinite dilution.

Write cathode and anode reaction in a fuel cell.

In the hydrogen-oxygen fuel cell, the carbon rods are immersed in the hot aqueous solution of __

(a) KCl

(b) KOH

(c) H₂SO₄

(d) NH₄Cl