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Selina solutions for Class 10 Chemistry chapter 6 - Electrolysis

Selina ICSE Concise Chemistry for Class 10

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Selina Selina ICSE Concise Chemistry Class 10

Selina ICSE Concise Chemistry for Class 10

Chapter 6: Electrolysis

Chapter 6: Electrolysis solutions [Page 0]

FILL IN THE BLANKS: 

Powdered sodium chloride (common salt) does not conduct an electric current, but it does so when ………....... or when ………........ 

FILL IN THE BLANKS: 

Molten lead bromide conducts electricity .It is called an ………........ It is composed of lead ……….......and bromide ………........ The lead ions are ………....... charged and are called ………........ The bromide ……….......are ……….......charged and are called ………........

FILL IN THE BLANKS: 

Substances which conduct electricity in the solid state are generally ………........ 

FILL IN THE BLANKS: 

The electron releasing tendency of zinc is ………....... than that of copper. 

FILL IN THE BLANKS: 

A solution of HCl gas in water conducts electricity because ………......., but a solution of HCl gas in toluene does not conduct an electric current because ………....... 

Define the following term: 

Electrolysis

Define the following term: 

Non-electrolyte 

Define the following term:

Cation and anion

 

Define the following term:
Weak electrolyte

What is the difference between:
Modern explanation and Arrhenius explanation for the theory of electrolysis:

What is the difference between:

electrolytic dissociation and ionization.

What is the difference between:
A cation and an anion

What is the difference between:
Electrolytic dissociation and thermal dissociation.

Name a salt which is a weak electrolyte.

Name a base which is a weak electrolyte.

Name an inert electrode and an active electrode.

Name a positively charges non-metallic ion.

Name the electrode at which reduction occurs.

Name a non-metallic element which is a conductor of electricity.

Electrolysis is a redox process. Explain.

Chapter 6: Electrolysis solutions [Page 0]

Name two substances in the following case:
Contain only molecules.

Name two substances in the following case:
Contain only ions.

Name two substances in the following case:

Contain ions as well as molecules.

Explain the following:
A solution of cane sugar does not conduct electricity, but a solution of solution of sodium chloride is a good conductor.

Explain the following:

Hydrochloric acid is a good conductor of electricity.

Explain the following:

During the electrolysis of an aqueous solution of NaCI, hydrogen ion is reduced at the cathode and not the sodium ion though both Na+ and H+ ions are present in the solution.

Among Zn and Cu, which would occur more readily in nature as metal and which as ion?

Why cannot we store AgNO3 solution in copper vessel?

Out of Cu and Ag, which is more active?

How would you change a metal like Cu into its ions?

how would you change Cu2+ ion to Cu?

A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases?

During electrolysis of an aqueous solution of sulphuric acid between platinum electrodes, two types of anions migrate towards the anode but only one of themis discharged:
(a) Name the two anions,
(b) Name the main product of the discharge of anion at the anode and write the anode reaction,
(c) Name the product at the cathode and write the reaction.
(d) How you notice any change in colour. State why?
(e) Why this electrolysis, is considered as an example of catalysis?

An electrolytic cell is set up using two platinum electrodes and an aqueous solution of copper (II) sulphate,
(a)draw a labelled diagram of the electrolytic cell,
(b)Name the ions present in the cell,
(c)Name the ions migrating towards the anode,
(d)Name the ions migrating towards the cathode,
(e)Name the ions which will not be discharged at electrodes during electrolysis,
(f)Write the reaction at the cathode,
(g)Write the reaction at the anode,
(h)Name the spectator ion in the solution.

State the electrode reaction at the anode during electrolysis of:
very dilute sulphuric acid.

State the electrode reaction at the anode during electrolysis of:
Aqueous copper sulphate solution.

State the electrode reaction at the anode during electrolysis of:
sodium chloride solution.

State the electrode reaction at the anode during electrolysis of:
Fused lead bromide.

State the electrode reaction at the anode during electrolysis of:
magnesium chloride (molten).

Choosing only words from the following list, write down the appropriate words to fill in the blanks (a) to (e) below: anions, anode, cathode, cations, electrode, electrolyte, nickel, voltameter.
The electroplating of an article with nickel requires an
(a)_______which must be a solution containing (b)____ions. The article to be plated is placed as the (c)____of the cell in which the plating is carried out. The (d)____of the cell is made from pure nickel. The ions that are attracted to the negative electrode and discharged are called (e)________

Chapter 6: Electrolysis solutions [Page 0]

Give reason for the following:
Electrolysis of molten lead bromide is considered to be a reaction in which oxidation and reduction go side by side, i.e., a redox reaction.

Give reason for the following:
The blue colour of aqueous copper sulphate fades when it is electrolysed using platinum electrodes.

Give reasons for the following:

Lead bromide undergoes electrolytic dissociation in the molten state but is a nonelectrolyte in the solid state.

Give reason for the following:
Aluminium is extracted from its oxide by electrolytic reduction and not by convectional reducing agents.

Give reason for the following:
The ratio of hydrogen and oxygen formed at the cathode and anode is 2: 1 by volume.

Give reason for the following:
In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification.

Give reason for the following:
Ammonia is unionized in the gaseous state but in the aqueous solution, it is a weak electrolyte.

Give reason for the following:
A graphite anode is preferred to other inert electrodes during electrolysis of fused lead bromide.

Give reason for the following:
for electroplating with silver, silver nitrate is not used as electrolyte.

Give reason for the following:
carbon tetrachloride is a liquid but does not conduct electricity.

Classify the following substance under three headings:
(a) strong electrolytes (b) Weak electrolytes (c) Non electrolytes.
Acetic acid, ammonium chloride, ammonium hydroxide, carbon tetrachloride, dilute hydrochloric acid, sodium acetate, dilute sulphuric acid.

Write down the word or phrase from the bracket that will correctly fill in the blank in the following sentence:
Pure water consists entirely of ________________ (ions/ molecules).

Write down the word or phrase from the bracket that will correctly fill in the blank in the following sentence:
We can expect that pure water ________________ (will / will not) normally conduct electricity.

To carry out the so-called “electrolysis of water”. Sulphuric acid is added to water. How does the addition of sulpuric acid produce a conducting solution?

Copy and complete the following table which refers to two practical applications of electrolysis

  Anode Electrolyte Cathode
Silver plating of a spoon Plate of pure clean Solution of potassium argentocyanide Article to be electroplated
Purification of copper Impure copper Solution of copper sulphate and dilute sulphuric acid Thin strip of pure copper

Complete the sentence by choosing correct word given in bracket.
Electrolysis is the passage of ___________________
(electricity / electrons)

Complete the sentence by choosing correct word given in bracket.

through a liquid or a solution accompanied by a ___________ (Physical / chemical) change.

Chapter 6: Electrolysis

Selina Selina ICSE Concise Chemistry Class 10

Selina ICSE Concise Chemistry for Class 10

Selina solutions for Class 10 Chemistry chapter 6 - Electrolysis

Selina solutions for Class 10 Chemistry chapter 6 (Electrolysis) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Selina ICSE Concise Chemistry for Class 10 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at shaalaa.com are providing such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 10 Chemistry chapter 6 Electrolysis are Electroplating, Concept of Electrolysis, Acids, Bases and Salts as Electrolytes, Choice of Electrolyte for Electroplating, Applications of Electrolysis - Purification of Copper, Applications of Electrolysis - Electroplating with Nickel and Silver, Elementary Study of the Migration of Ions, Substances Containing Both Molecules and Ions, Substances Containing Ions Only, Substances Containing Molecules Only, Electrolytes and Non-Electrolytes.

Using Selina Class 10 solutions Electrolysis exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 10 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 6 Electrolysis Class 10 extra questions for Chemistry and can use shaalaa.com to keep it handy for your exam preparation

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