Match List I with List II.
 List I (Conversion) List II (Number of Faraday required) A. 1 mol of H2O to O2 I. 3F B. 1 mol of $$MnO^-_4$$ to $$Mn^{2+}$$ II. 2F C. 1.5 mol of $$Ca$$ from molten $$CaCl_2$$ III. 1F D. 1 mol of FeO to Fe2O3 IV. 5F
Choose the correct answer from the options given below:
1. A - III, B - IV, C - I, D - II
2. A - II, B - III, C - I, D - IV
3. A - III, B - IV, C - II, D - I
4. A - II, B - IV, C - I, D - III
Subtopic:  Faraday’s Law of Electrolysis |
60%
From NCERT
NEET - 2024
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Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate for 100 seconds is(Given : Molar mass of Cu: $$63 g mol^{-1}$$ F = 96487 C)

1. 0.315 g
2. 31.5 g
3. 0.0315 g
4. 3.15 g
Subtopic:  Faraday’s Law of Electrolysis |
64%
From NCERT
NEET - 2024
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Given below are two statements:
 Statement I: $$2 \mathrm{~F}$$ electricity is required for the oxidation of 1 mole $$\mathrm{H}_2 \mathrm{O}$$ to $$\mathrm{O}_2$$. Statement II: To get $$40.0 \mathrm{~g}$$ of Aluminium from molten $$\mathrm{Al}_2 \mathrm{O}_3$$ required electricity is $$4.44 \mathrm{~F}$$.

In the light of the above statements, choose the correct answer from the options given below:
1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true
Subtopic:  Faraday’s Law of Electrolysis |
62%
From NCERT
NEET - 2024
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From the following select the one which is not an example of corrosion:
 1 Rusting of an iron object 2 Production of hydrogen by electrolysis of water 3 Tarnishing of silver 4 Development of green coating on copper and bronze ornaments
Subtopic:  Corrosion |
82%
From NCERT
NEET - 2024
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The standard cell potential of the following cell $$\mathrm{Zn}\left|\mathrm{Zn}^{2+}(\mathrm{aq}) \| \mathrm{Fe}^{2+}(\mathrm{aq})\right| \mathrm{Fe}~\text{ is }~0.32 \mathrm{~V}.$$ Calculate the standard Gibbs energy change for the reaction:
$$\mathrm{Zn}(\mathrm{s})+\mathrm{Fe}^{2+}(\mathrm{aq}) \rightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Fe}(\mathrm{s})$$

(Given : $$1 \mathrm{~F}=96487 \mathrm{C} mol^{-1}$$)

1. $$-61.75 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
2. $$+5.006 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
3. $$-5.006 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
4. $$+61.75 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
Subtopic:  Relation between Emf, G, Kc & pH |
80%
From NCERT
NEET - 2024
Hints

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
 Assertion (A): In equation $$\Delta_{\mathrm{r}} \mathrm{G}=-\mathrm{nFE} _{\text {cell }},$$ value $$\mathrm{\Delta_rG }$$ depends on n. Reason (R): $$\mathrm{E_{cell} }$$ is an intensive property and  $$\mathrm{\Delta_rG }$$  is an extensive property.
In the light of the above statements choose the correct answer from the options given below:
 1 (A) is False but (R) is True. 2 Both (A) and (R) are True and (R) is the correct explanation of (A). 3 Both (A) and (R) are True and (R) is not the correct explanation of (A). 4 (A) is True but (R) is False.
Subtopic:  Relation between Emf, G, Kc & pH |
57%
From NCERT
NEET - 2023
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The conductivity of centimolar solution of KCl at 25°C is 0.0210 ohm–1 cm–1 and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of the cell constant is:
 1 3.34 cm–1 2 1.34 cm–1 3 3.28 cm–1 4 1.26 cm–1
Subtopic:  Conductance & Conductivity |
77%
From NCERT
NEET - 2023
Hints

The molar conductance of an electrolyte increases with dilution according to the equation:
$$\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\circ}-\mathrm{A} \sqrt{\mathrm{c}}$$
Consider the following four statements:
 A: This equation applies to both strong and weak electrolytes. B: The value of the constant A depends upon the nature of the solvent. C: The value of constant A is the same for both $$BaCl_2$$ and $$MgSO_4$$ D: The value of constant A is the same for both $$BaCl_2$$ and $$Mg(OH)_2$$
Which of the above statements are correct?
 1 (A) and (B) only 2 (A), (B), and (C) only 3 (B) and (C) only 4 (B) and (D) only
Subtopic:  Conductance & Conductivity |
55%
From NCERT
NEET - 2023
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The correct value of cell potential in volt for the reaction that occurs when the following two half cells are connected, is:
$$\mathrm{{Fe}_{ {(aq) }}^{2+}+2 {e}^{-} \rightarrow {Fe}({s}), {E}^{\circ}=-0.44{~V} }$$
$$\mathrm{{Cr}_2 {O}_7^{2-}{ }_{ {(aq) }}+14 {H}^{+}+6 e^{-} \rightarrow 2 {Cr}^{3+}+7 {H}_2 {O}},$$
$$\mathrm{{E}^{\circ}=+1.33 {~V}}$$
1. +1.77 V
2. +2.65 V
3. +0.01 V
4. +0.89 V
Subtopic:  Electrode & Electrode Potential |
72%
From NCERT
NEET - 2023
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