: As a lead storage battery gets discharged, density of electrolyte, present in it, decreases.
: Lead and lead dioxide both react with sulphuric acid to form lead sulphate.
- If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion
- If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion
- If Assertion: is true but Reason: is false
- If both Assertion: and Reason: are false
The Correct Option is A
Solution and Explanation
Top Questions on Galvanic Cells
- If one faraday of electricity is used in the discharging of \(Cu^{2+}\), then find the mass (ing) of \(Cu\) deposited (nearest integer)
- JEE Main - 2024
- Chemistry
- Galvanic Cells
- At what $pH$, given half cell $MnO _4^{-}(01 M ) \mid Mn ^{2+}(0001 M )$ will have electrode potential of $1282\, V$? (Nearest Integer)
(Given: $E _{ MnO _{4}^-| Mn ^{2+}}^{ o }=154 \,V , \frac{2303 RT }{ F }=0059\, V$)- JEE Main - 2023
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\(Pt(s) ∣ H2(g)(1atm) ∣ H+(aq, [H+]=1)\, ∥\, Fe3+(aq), Fe2+(aq) ∣ Pt(s)\)
Given\( E^∘_{Fe^{3+}Fe^{2+}}\)\(=0.771V\) and \(E^∘_{H^{+1/2}H_2}=0\,V,T=298K\)
If the potential of the cell is 0.712V, the ratio of concentration of \(Fe2+\) to \(Fe3+\) is- JEE Main - 2023
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- Galvanic Cells
- A galvanic cell converts:
- CUET (UG) - 2023
- Chemistry
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- The galvanic cell with the cell reaction
Mg(s) + 2Ag+ (0.001M)→ Mg2+ (0.65M) + 2Ag(s)
is correctly represented as- CUET (PG) - 2023
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Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Photosynthesis in higher plants
- Match the following column I with column II.
- AIIMS - 2019
- cloning
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- evolution
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
- Gravitation
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Transcription
Concepts Used:
Galvanic Cells
Galvanic cells, also known as voltaic cells, are electrochemical cells in which spontaneous oxidation-reduction reactions produce electrical energy. It converts chemical energy to electrical energy.
It consists of two half cells and in each half cell, a suitable electrode is immersed. The two half cells are connected through a salt bridge. The need for the salt bridge is to keep the oxidation and reduction processes running simultaneously. Without it, the electrons liberated at the anode would get attracted to the cathode thereby stopping the reaction on the whole.
Working Principle Of Galvanic Cell:
- Take two beakers containing electrolytic solutions of copper sulphate and zinc sulphate are taken. It is connected via a salt bridge containing an aqueous solution of potassium chloride.
- Zinc and copper electrodes are immersed in the respective electrodes and connected through a voltmeter to measure the electrical potential.
- Zinc which acts as the anode readily undergoes an oxidation process and acquires a negative charge.
- The electrons travel through the salt bridge and undergo a reduction process at the copper cathode.
- Thus the cathode would acquire a positive charge.
- This flow of electrons from the anode to the cathode induces a flow of electric current in the opposite direction which shall be measured by the voltmeter.
Types of Voltaic Cell:
- Primary Cell
- Dry Cell
- Mercury Cell
- Alkaline Cell
- Secondary Cell
- Nickel-Cadmium Cell
- Lead-Acid Cell
- Lithium-Ion Cell