
On passing the current in water voltameter, the hydrogen
A. Liberated at anode
B. Liberated at cathode
C. Doesn’t liberate
D. Remains in the solution
Answer
163.5k+ views
Hint: We need to understand a water voltameter's structure and working principle. Basic knowledge and understanding of the elementary composition of water (the electrolyte) are necessary.
Complete Step by Step Answer:
A water voltameter is a piece of equipment or apparatus used for measuring the quantity of electricity passed through a conductor by the amount of electrolysis produced. Electrolysis can be defined as the separation of different parts of the chemical composition of a liquid with the help of an electric current.
When electric current passes through the water voltameter, electrolysis takes place. This results in the breakdown of water into its elemental components, i.e., hydrogen and oxygen.
The hydrogen part contains positive charge, while the oxygen part contains negative charge. According to the principles of electrolysis, positive charges are liberated at the cathode and negative charges are liberated at the anode.
Hence, hydrogen will get liberated at cathode as it contains positive charge.
A better understanding could be gained from the diagram given below. It depicts the working of a water voltameter when an electric current is being passed through it.
The correct answer is option B.
Additional information: Water voltameter is also known as Hofmann voltameter in honour of August Wilhelm von Hofmann, its inventor.
Note: If pure water is used in the voltameter, electrolysis will not happen as pure water is a non-conductor of electricity. But if there is an ionic compound such as sodium chloride or sulphuric acid present in the solution, the process will get started automatically upon applying of electric current.
Complete Step by Step Answer:
A water voltameter is a piece of equipment or apparatus used for measuring the quantity of electricity passed through a conductor by the amount of electrolysis produced. Electrolysis can be defined as the separation of different parts of the chemical composition of a liquid with the help of an electric current.
When electric current passes through the water voltameter, electrolysis takes place. This results in the breakdown of water into its elemental components, i.e., hydrogen and oxygen.
The hydrogen part contains positive charge, while the oxygen part contains negative charge. According to the principles of electrolysis, positive charges are liberated at the cathode and negative charges are liberated at the anode.
Hence, hydrogen will get liberated at cathode as it contains positive charge.
A better understanding could be gained from the diagram given below. It depicts the working of a water voltameter when an electric current is being passed through it.
The correct answer is option B.
Additional information: Water voltameter is also known as Hofmann voltameter in honour of August Wilhelm von Hofmann, its inventor.
Note: If pure water is used in the voltameter, electrolysis will not happen as pure water is a non-conductor of electricity. But if there is an ionic compound such as sodium chloride or sulphuric acid present in the solution, the process will get started automatically upon applying of electric current.
Recently Updated Pages
JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

JEE Main 2025 Session 2: Exam Date, Admit Card, Syllabus, & More

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Trending doubts
Types of Solutions

Degree of Dissociation and Its Formula With Solved Example for JEE

Instantaneous Velocity - Formula based Examples for JEE

JEE Main Chemistry Question Paper with Answer Keys and Solutions

JEE Main Reservation Criteria 2025: SC, ST, EWS, and PwD Candidates

What is Normality in Chemistry?

Other Pages
Thermodynamics Class 11 Notes: CBSE Chapter 5

Total MBBS Seats in India 2025: Government College Seat Matrix

NEET Total Marks 2025: Important Information and Key Updates

Neet Cut Off 2025 for MBBS in Tamilnadu: AIQ & State Quota Analysis

Karnataka NEET Cut off 2025 - Category Wise Cut Off Marks

NEET Marks vs Rank 2024|How to Calculate?
