Subject: Chemistry, asked on 10/3/18

Q. You are acquainted with the construction and working of a lead storage battery. Give the plausible reasons for these facts: a. There is only a single compartment unlike other electrochemical cells which have two compartments. b. Addition of water is necessary from time to time for maintenance.

Subject: Chemistry, asked on 10/3/18

Explain this graph:

Subject: Chemistry, asked on 10/3/18

The products of electrolysis of aqueous NaCl at the respective electrodes are : Cathode : H2 Anode : Cl2 and not O2. Explain.

Subject: Chemistry, asked on 9/3/18

Why does a dry cell becomes dead afyer a long time even if it has been not been used ? ( No links please )

Subject: Chemistry, asked on 8/3/18

Plz explain me this graph..  Also how does molar conductivity changes for weak and strong electrolyte ??

Subject: Chemistry, asked on 25/2/18

Pls solve n send asap Q.10. The following curve is obtained when ${\lambda }_{m}$ is plotted against the square root of concentration for two electrolytes A and B. a) What can you say about the nature of the two electrolytes A and B? b) How do you account for the increase in ${\lambda }_{m}$ for the electrolytes A and B on dilution?

Subject: Chemistry, asked on 24/2/18

(a) Calculate the mass of Ag deposited at cathode when a current of 2 amperes was passed through a solution of AgNO3 for minutes. (Given: Molar mass of Ag = 108 g mol–1 1F = 96500 C mo1–1)

Subject: Chemistry, asked on 23/2/18

What do you understand by the signs on the electrode potentials as used in electrochemistry ?

Subject: Chemistry, asked on 21/2/18

An electrochemical cell is made from iron and copper electrodes whose standard reduction potential are - 0.44V and +0.34 V respectively.  Find cell potential at 298 K if concentration of Cu2+ and Fe2+ are 0.01 and 0.1 mol/l respectively.  Also find maximum work obtained from cell.

Subject: Chemistry, asked on 20/2/18

why is the E0M2+ /M for Cu positive?​

Subject: Chemistry, asked on 20/2/18

No links please Q.(i). Write with balanced equation, what happens when a mixture of sodium nitrate, Zn-dust and aqueous solution of caustic soda is heated.

Subject: Chemistry, asked on 19/2/18

Dear meritnation team,  I think there is a correction in the chapter 3 electrochemistry part 1 of class 12 in the intext question Q.3.3 where the reduction potential is -0.77 and higher values can oxidise it but u have mentioned that even O2 can oxidise but its electrode potential value is -0.68 and hence wont oxidise ferrous ion  Thank you for ur consideration  Regards,  Samreen rizwan

Subject: Chemistry, asked on 10/2/18

Write the anode and the cathode reactions and the overall reaction in Lead Storage battery while operating.

Subject: Chemistry, asked on 5/2/18

AgBr(s) --> Ag+ + Br- ; Eo = -0.72V. Value of logKsp ?

Subject: Chemistry, asked on 4/2/18

Solve this.

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