12th Standard CBSE Syllabus & Materials

12th Standard CBSE

CBSE 12th Economics Government Budget and the Economy Previous year Question Papers Study Material - QB365 Set A

NEW

12th Standard CBSE

CBSE 12th Computer Science Interface Python with MySQL - New Previous year Question Papers Study Material - QB365 Set A

NEW

12th Standard CBSE

CBSE 12th Computer Science Database Concept - New Previous year Question Papers Study Material - QB365 Set A

NEW

12th Standard CBSE

CBSE 12th Computer Science Data Communication - New Previous year Question Papers Study Material - QB365 Set A

NEW

12th Standard CBSE

CBSE 12th Computer Science Data Structures - New Previous year Question Papers Study Material - QB365 Set A

NEW

12th Standard CBSE

CBSE 12th Computer Science Functions - New Previous year Question Papers Study Material - QB365 Set A

CBSE 12th Standard Chemistry Subject Electrochemistry Ncert Exemplar 1 Mark Questions 2021

Published on: 25/05/2021

QB365 Provides the updated NCERT Exemplar Questions for Class 12, and also provide the detail solution for each and every NCERT Exemplar questions. NCERT Exemplar questions are latest updated question pattern from NCERT, QB365 will helps to get more marks in Exams

Download CBSE Class 12th Standard CBSE Chemistry question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Chemistry

Questions + Answers key

Take MCQ Chemistry Test

QB365 Student Learing Managemnet System

Std: 12th Standard CBSE - Chemistry

chapter: - NCERT Exemplers

Visit QB365-SLMS - https://www.qb365.in/slms/ Complete Questions and Answers

Questions:

Generic 2

4 x 2 = 8

Express the relation among conductivity of the solution in the cell, the cell constant and resistance of solution in the cell.

How do metallic and ionic substances differ in conducting electricity ?

How many faradays of electric charge is required to liberate 5600 cm³ of oxygen at STP ?

What is meant by Faraday constant?

Visit QB365-SLMS - https://www.qb365.in/slms/

Answers Key:

Generic 2

4 x 2 = 8

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\text { Conductivity }(k)=\frac{1}{\text { Resistance }(R)} \times \text { Cell constant }\)

In metallic substances, flow of electricity is due to flow of electrons while in ionic substances in the aqueous solution or molten state, the flow of electricity is due to flow of ions.

\( O^{2-} \longrightarrow \frac{1}{2} O_2+2 e^{-} \text {or } 2 O^{2-} \longrightarrow O_2+4 e^{-}\)
Thus, 1 mole of O₂ , i.e., 22400 cm³require 4 faradays of charge.
5600 cm³ of O₂ will require charge \(=\frac{4}{22400}=5600=\) 1 fara day

Faraday constant, F = 96500 coulombs. It is that quantity of electricity which deposits one gram equivalent of the substance or it is the charge carried by one mole of electrons.