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Subject: Chemistry, asked on 9/6/17

for strong electrolytes the values of molar conductivities at infinite dilution are give below:
electrolyte           ^0m(Sm​2mol-1)
BaCl2                  280x10-4
NaCl                 126.5x10-4
NaOH              248X10-4
The molar conductance at infinite dilution for Ba(OH)2 is 










 

Subject: Chemistry, asked on 25/5/17

how many faradays are required to liberate 8g of hydrogen

Subject: Chemistry, asked on 25/5/17

solve

25. Which of the following solutions will have highest equivalent conductance?
     a)  0.01 M NaCl     b)  0.050 M NaCl        c)   0.005 M NaCl      d)  0.02 M NaCl

 

Subject: Chemistry, asked on 10/5/18

Solve this:
The standard emf of the following cell:
Cd(s)|CdCl2(aq) (0.10 M)||Cl-| AgCl(s)|Ag(s)
In which the cell reaction is 2AgCl(s) + Cd(s) →2Ag(s) +Cd2+ + 2Cl-(aq) is 0.6915 V at 100 C and 0.6753 V at 250C. The ∆H of reaction at 250C is
(A) -192.5 kJ                                      (B) -234.7 kJ
(C) 123.5 kJ                                       (D) -167.26 kJ

Subject: Chemistry, asked on 25/4/18

How to solve this
Q.72. Calculate the current (in mA) required to deposit 0.195 g of platinum metal in 5.0 hours from a solution of PtCl62-: (atomic weight : Pt = 195)
(1) 310
(2) 31
(3) 21.44
(4) 5.36

Subject: Chemistry, asked on 12/2/16

How long will it take to produce 2.415 g of Ag metal from its salt solution by passing a current of 3A ? How many miles of electrons are required ? Molar mass of Ag is 107.9 g/ mol.

Subject: Chemistry, asked on 3/1/18

Consider the half-cell reduction reaction
Mn2++2e-→ Mn, E°=-1.18 VMn2+→Mn3++e-, E°=-1.51 V

The E° for the reaction 3Mn2+→Mn0+2Mn3+ and possibility of the forward reaction are respectively
(a) –4.18 V and yes              (b) +0.33 V and yes
(c) +2.69 V and no               (d) –2.69 V and no

Subject: Chemistry, asked on 21/6/15

A quantity of 0.3 g of Cu was deposited from CuSO4 solution by passing 4A through the solution for 3.8 min. Calculate the value of faraday constant ?

Subject: Chemistry, asked on 22/2/17

Which Diagram should be drawn in Boards for a Standard Calomel Electrode??
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Subject: Chemistry, asked on 15/2/18

On passing 1.5F charge the number_of moles of aluminium deposited at cathode are- (a)1(b)13.5(c)0.50(d)0.75

Subject: Chemistry, asked on 15/11/17

the SI unit of molar conductivity is

Subject: Chemistry, asked on 27/7/17

100 ml of 0.05 M CuSO4 (aq.) Solution was electrolysed using inert electrodes by passing current till the pH of the resulting solution was 2. The solution after electrolysis was neutralised and then treated with excess KI and formed I2 was then titrated with Na2S2O3. Then the required volume of Na2S2O3 is

Subject: Chemistry, asked on 14/9/14

Calomel electrode is an example of ?

Subject: Chemistry, asked on 8/10/16

3) (iii) Resistance of conductivity cell filled with 0.1 M KCl solution is 100 ohms. If the resistance of the same cell when filled with 0.02 M KCl solution is 520 ohms, calculate the conductivity and molar conductivity of 0.02 M KCl solution.

[Given : Conductivity of 0.1 M KCl solution is 1.29 S/m]

Subject: Chemistry, asked on 29/12/17

Q. A quantity of electric charge that brings about the deposition of 4.5 g Al from Al- at the cathode will also produce the following volume (STP) of H2(g) from H+ at the cathode.
1. 44.8 L
2. 22.4 L
3. 11.2 L
4. 5.6 L
 

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