back to directory
NEET CHEMISTRYElectrochemistryMedium

Question

Given below are two statements: Statement I: 2 F2\text{ F} electricity is required for the oxidation of 1 mole H2O1\text{ mole H}_2\text{O} to O2\text{O}_2. Statement II: To get 40.0 g40.0\text{ g} of Aluminium from molten Al2O3\text{Al}_2\text{O}_3 required electricity is 4.44 F4.44\text{ F}. In the light of the above statements, choose the correct answer from the options given below:

A

Both Statement I and Statement II are true

B

Both Statement I and Statement II are false

C

Statement I is true but Statement II is false

D

Statement I is false but Statement II is true

Step-by-Step Solution

Statement I: The oxidation of water is represented by the equation: H2O12O2+2H++2e\text{H}_2\text{O} \rightarrow \frac{1}{2}\text{O}_2 + 2\text{H}^+ + 2\text{e}^- For 1 mole1\text{ mole} of H2O\text{H}_2\text{O}, 2 moles2\text{ moles} of electrons are involved. Thus, 2 F2\text{ F} of electricity is required. So, Statement I is true.

Statement II: The reduction of Aluminium from molten Al2O3\text{Al}_2\text{O}_3 is: Al3++3eAl\text{Al}^{3+} + 3\text{e}^- \rightarrow \text{Al} 3 F3\text{ F} of electricity is required to produce 1 mole1\text{ mole} (27 g27\text{ g}) of Al\text{Al}. To produce 40.0 g40.0\text{ g} of Al\text{Al}, the required electricity =3 F27 g×40.0 g=4.44 F= \frac{3\text{ F}}{27\text{ g}} \times 40.0\text{ g} = 4.44\text{ F}. So, Statement II is also true.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Electrochemistry. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYElectrochemistrystatementsstatementelectricityrequiredoxidation

More Electrochemistry Questions

View all

A cell reaction becomes spontaneous when:

A.$\Delta G^{\circ}$ is negative
B.$\Delta G^{\circ}$ is positive
C.$E^{\circ}_{Red}$ is positive
D.$E^{\circ}_{Red}$ is negative
EasySolve

In a typical fuel cell, the reactants (R) and products (P) are:

A.R = $H_2(g)$, $O_2(g)$; P = $H_2O_2(l)$
B.R = $H_2(g)$, $O_2(g)$; P = $H_2O(l)$
C.R = $H_2(g)$, $O_2(g)$, $Cl_2(g)$; P = $HClO_4(aq)$
D.R = $H_2(g)$, $N_2(g)$; P = $NH_3(aq)$
EasySolve

The cell reaction of an electrochemical cell is $Cu^{2+}(C_1) + Zn \rightarrow Cu + Zn^{2+}(C_2)$. The change in free energy will be the function of:

A.$\ln(C_1+C_2)$
B.$\ln(C_2/C_1)$
C.$\ln C_2$
D.$\ln C_1$
MediumSolve

The efficiency of a fuel cell is given by:

A.$\Delta H/\Delta G$
B.$\Delta G/\Delta S$
C.$\Delta G/\Delta H$
D.$\Delta S/\Delta G$
EasySolve

The number of Faradays (F) required to produce $20 \text{ g}$ of calcium from molten $\text{CaCl}_2$ (Atomic mass of Ca = $40 \text{ g mol}^{-1}$) is:

A.2
B.3
C.4
D.1
MediumSolve

For a cell involving one electron $E^\ominus_{\text{cell}} = 0.59 \text{ V}$ at $298 \text{ K}$. The equilibrium constant for the cell reaction is: [Given that $\frac{2.303 RT}{F} = 0.059 \text{ V}$ at $T = 298 \text{ K}$]

A.$1.0 \times 10^{30}$
B.$1.0 \times 10^2$
C.$1.0 \times 10^5$
D.$1.0 \times 10^{10}$
EasySolve

The value of $E^{\circ}_{cell}$ for the following reaction is: $Cu^{2+} + Sn^{2+} \rightarrow Cu + Sn^{4+}$ (Given, equilibrium constant is $10^6$)

A.0.17
B.0.01
C.0.05
D.1.77
MediumSolve

The three cells with their $E^{\circ}_{cell}$ values are given below: 1. $Fe|Fe^{2+}||Fe^{3+}|Fe \ ; \ 0.404\text{ V}$ 2. $Fe|Fe^{2+}||Fe^{3+}, Fe^{2+}|Pt \ ; \ 1.211\text{ V}$ 3. $Fe|Fe^{3+}||Fe^{3+}, Fe^{2+}|Pt \ ; \ 0.807\text{ V}$ The standard Gibbs free energy change values for three cells are, respectively: (F represents the charge on $1\text{ mole}$ of electrons.)

A.–1.212 F, –1.211 F, –0.807 F
B.+2.424 F, +2.422 F, +2.421 F
C.–0.808 F, –2.422 F, –2.421 F
D.–2.424 F, –2.422 F, –2.421 F
HardSolve

This neet chemistry practice question is part of the TopperSquare free question bank. TopperSquare offers 15,000+ chapter-wise NEET MCQs across Physics, Chemistry, and Biology with detailed step-by-step explanations, full mock tests, NEET PYQs (2010–2024), and an AI-powered performance analytics dashboard. browse all neet practice questions → · practice chemistry sets →

Given below are two statements: Statement I: $2\te... | NEET MCQ | TopperSquare