Home
Class 12
CHEMISTRY
The overall reaction for the lead storag...

The overall reaction for the lead storage batter when it discharges is:
`Pb(s) + PbO_(2)(s) + 4H^(+)(aq) + 2SO_94)^(2-)(aq) rightarrow 2PbSO_(4)(s) + 2H_(2)O(l)`
(P) PbSO_(4) is formed only at the cathode.
(Q) The density of the solution decreases.
Which statements correctly describes the battery as its discharges?

A

P only

B

Q only

C

both P and Q

D

neither P not Q

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ELECTROCHEMISTY

    GRB PUBLICATION|Exercise Thermodynamics in Electrochemistry|22 Videos

  • ELECTROCHEMISTY

    GRB PUBLICATION|Exercise Faraday s Laws and Electrolysis|87 Videos

  • ELECTROCHEMISTY

    GRB PUBLICATION|Exercise Latimer Diagram, concentration cells|117 Videos

  • D-BLOCK ELEMENTS

    GRB PUBLICATION|Exercise Subjective Type|18 Videos

  • ENVIRONMENTAL CHEMISTRY

    GRB PUBLICATION|Exercise Straight objective type|40 Videos

Similar Questions

Explore conceptually related problems

The equation for one of the half-reactions in a lead storage battery is : PbO-(2) + 4H^(+) + SO_(4)^(2-) + 2e^(-) rightarrow PbSO_(4) + 2H_(2)O What happens to the properties of the electrolyte as this

The following reaction takes place during discharge of lead storage battery: Pb(s)+PbO_(2)(s)+2H_(2)SO_(4)(aq)to2PbSO_(4)(s)+2H_(2)O(l) If 2.5 ampere of current is drawn for 16 hours 5 min, how much H_(2)SO_(4) is consumed?

Knowledge Check

  • In the equation below, which species acts the oxidation agent? Pb(s)+PbO_(2)(s)+H^(+)(aq)+2HSO_(4)^(-)(aq)rarr2PbSO_(4)(s)+2H_(2)O(l)

    A
    `Pb(s)`
    B
    `PbO_(2)(s)`
    C
    `H^(+)`(aq)
    D
    `HSO_(4)^(-)`(aq)

  • When lead storage battery discharges , specific gravity of H_(2)SO_(4) decreases to

    A
    zero
    B
    1.17
    C
    1.28
    D
    1.215

  • Equivalent weight of H_(2)SO_(4) in the following reaction (Pb(s) + PbO_(2)(s) + H_(2)SO_(4) rightarrow PbSO_(4) + H_(2)O is

    A
    98
    B
    49
    C
    196
    D
    80

    • Similar Questions

    Explore conceptually related problems

    The half reactions that occur in a lead acid battery are: PbSO_(3)(s)+2e^(-)toPb(s)+SO_(4)^(2-)(aq)E^(@)=-0.36V PbO_(2)(s)+4H^(+)(aq)+SO_(4)^(2-)(aq)+2e^(-)toPbSO_(4)(s)+2H_(2)O(l)E^(@)=+1.69V Calculate the overall potential for the cell in discharging reaction, E_(cell)^(@) Give answer in nearest single digit integer.

    Pb//PbSO_(4)_((s)), SO_(4(aq))^(-2) Pb_((s))+SO_(4)^(-2) hArr PbSO_(4(s))+ ?

    Use the given standard reduction potentials to determine the reduction potential for this half-reactions. MnO_(4)^(-)(aq) + 3e^(-) + 4H^(+) rightarrow MnO_(2)(S) + 2H_(2)O(l)

    Pb(NO_(3))_(2)+H_(2)SO_(4) to PbSO_(4)darr+2HNO_(3)

    During discharging of lead-storage acid battery following reaction takes place : Pb(s) +PbO_(2)(s)+2H_(2)SO_(4)rarr 2PbSO_(4)(s)+2H_(2)O If 2.5 amp of current is drawn for 965 minutes, H_(2)SO_(4) consumed is :

    Home
    Profile