NCERT Solutions For Class 12 Chemistry Chapter 3: Electrochemistry

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NCERT Solutions for class 12 Chemistry Chapter 3 Electrochemistry are provided in this article. It consists of all important formulas, chemical equations, important laws and numericals. Important topics covered in Class 12 Chemistry Chapter 3 Electrochemistry are:

Expected No.of Questions: 2 to 4 questions of 9 marks

Download PDF: NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry PDF

NCERT Solutions for Class 12 Chemistry Chapter 3

NCERT Solutions PDF for Class 12 Chemistry Chapter 3 Electrochemistry is given below.

NCERT Solutions

Class 12 Chemistry Chapter 3: Electrochemistry – Important Topics

Important topics of Class 12 Chemistry Chapter 3 Electrochemistry includes the following.

Electrochemistry deals with the study of electricity in chemistry involving electrodes, electrolysis, solutions and solvents. This mechanism is commonly seen in Electrochemical cells. There are two common types of electrochemical cells.

Galvanic Cell: In this, chemical energy is converted to electrical energy. It is also known as voltaic cell. Here, the anode is negatively charged and cathode is positively charged.

Electrolytic Cell: In this, electrical energy is converted to chemical energy. Here, the cathode is negatively charged and anode is positively charged.

Standard Electrode Potential is the standard EMF of the cell. The potential difference between the electrode and electrolyte is known as the potential of electrode and at unit concentration.

E⁰_Cell = E⁰_{red, Cathode} – E⁰_{red, Anode}

Nernst equation is establishes the relation between the cell potential of an electrochemical cell, the standard cell potential, temperature, and the reaction quotient.

$E_{cell} = E^0 _{cell} - \frac{RT}{nF}ln Q$

Also Read:

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Cell Potential	Electrodes	Quantitative aspect of Electrolysis
Product of electrolysis	Molar conductivity variations	Uses of Electroplating
Non electrolytes	Reduction Potential	Daniel Cell

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CBSE CLASS XII Related Questions

1.
The strongest base in aqueous solution among the following amines is:
- C$_6$H$_5$NH$_2$ \hspace{0.5cm}
- C$_6$H$_5$NH$_2$
- C$_2$H$_5$NH$_2$ \hspace{1cm}
- C$_6$H$_5$NH$_2$
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2.
Calculate the standard Gibbs energy ($ \Delta G^\circ $) of the following reaction at 25°C: \[ \text{Au}(s) + \text{Ca}^{2+}(1M) \to \text{Au}^{3+}(1M) + \text{Ca}(s) \] \[ E^\circ_{\text{Au}^{3+}/\text{Au}} = +1.5 \, \text{V}, \quad E^\circ_{\text{Ca}^{2+}/\text{Ca}} = -2.87 \, \text{V} \] Predict whether the reaction will be spontaneous or not at 25°C. [1 F = 96500 C mol$^{-1}$]
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3.
Why are haloarenes less reactive towards nucleophilic substitution reactions? How does the presence of nitro (–NO₂) group at ortho- and para-positions in haloarenes increase the reactivity towards nucleophilic substitution reactions?
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4.
Complete the following reactions by writing the structural formulae of ‘A’ and ‘B’:
(i) CH$_3$CH=CH$_2$ + HBr $\xrightarrow{\text{Peroxide}}$ ‘A’ $\xrightarrow{KOH}$ ‘B’
(ii) CH$_3$CH$_2$CHCl + alc. KOH $\xrightarrow{\Delta}$ ‘A’ $\xrightarrow{\text{H}_2\text{O}}$ ‘B’ (Main product)
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5.
Assertion (A): Vitamin D cannot be stored in our body. Reason (R): Vitamin D is fat-soluble vitamin and is not excreted from the body in urine.
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
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6.
Why is [Ni(CN)4]2- square planar while [Ni(CO)4] is tetrahedral? [Atomic number : Ni = 28]
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