Electrolysis

Question 1

Electrolysis literally means

Answer 1

Pertaining to the flow of electrons

Question 2

What does electrolysis result in

Answer 2

Discharge of ions as neutral atoms at the respective electrodes

Question 3

Electrolysis is a ____ reaction

Answer 3

Redox

Question 4

Electrolytes are ____ compounds

Answer 4

Ionic

Question 5

Particles in electrolytes

Answer 5

Ions only or Ions and molecules only

Question 6

Non electrolytes are ____ compounds

Answer 6

Covalent

Question 7

Particles in non electrolytes

Answer 7

Molecules only

Question 8

Examples of electrolytes

Answer 8

HCl, HNO3, CuSO4 , PbBr2, etc

Question 9

Examples of non electrolytes

Answer 9

Pure water, Cs2, CCl4 , sugar solution, glucose, etc

Question 10

Particles in strong electrolytes

Answer 10

Ions only

Question 11

Example of 3 bases which are weak electrolytes

Answer 11

NH4OH, Mg(OH)2 , Ca(OH)2

Question 12

Particles in weak electrolytes

Answer 12

Ions and unionised molecules

Question 13

The device in which electrolysis is carried out

Answer 13

Electrolytic cell

Question 14

Electrolytic cell is also known as ____

Answer 14

Voltammeter`

Question 15

Metal plates which allow electric current to enter or leave the cell

Answer 15

Electrodes

Question 16

Sometimes, graphite electrodes are used instead of metals? when

Answer 16

When products formed during electrolysis react with metals

Question 17

Electrode connected to the positive terminal of the battery

Answer 17

Anode

Question 18

Electrode connected to the negative terminal of the battery

Answer 18

Cathode

Question 19

_____ migrate to anode

Answer 19

Anions

Question 20

___ migrate to cathode

Answer 20

Cations

Question 21

____ is the oxidising electrode

Answer 21

Anode

Question 22

_____ is the reducing electrode

Answer 22

Cathode

Question 23

Atoms which carry positive charge -_____

Atoms which carry negative charge - ______

Answer 23

Cations, Anions

Question 24

Mechanism of electrolysis was first explained by ___ _____ in the year ____

Answer 24

Avante Arrhenius, 1887

Question 25

Avante Arrhenius belonged to ___

Answer 25

Sweden

Question 26

An electrolytic solution is in _____ _____

Answer 26

Electrolytic equilibrium

Question 27

___________ is the extent to which an electrolyte dissociates into ions

Answer 27

Degree of dissociation

Question 28

________ is responsible for the flow of current through the solution

Answer 28

Ions

Question 29

In electrolysis, exchange of electrons takes place at the _____

Answer 29

Surface of the electrodes

Question 30

Amount of electricity conducted by the electrolyte depends on

Answer 30

Concentration of ions in the solution

Question 31

Electrolytic dissociation takes place in ____ compounds and involves _____ of ions

Answer 31

Ionic, separation

Question 32

Ionisation takes place in ____ compounds and involves ___ of ions

Answer 32

Covalent, formation

Question 33

__ ions are essential for conducting electricity

Answer 33

Free

Question 34

water is a __ solvent

Answer 34

Polar

Question 35

Polar covalent compounds are non electrolytes in the __ state but ionise in ___ state

Answer 35

Gaseous , Aq.soln

Question 36

When an ionic compound is heated, what does the ions gain

Answer 36

Kinetic energy

Question 37

in a metal, flow of electricity takes place by the flow of ____

Answer 37

Electrons

Question 38

during ___ conduction there is no transfer of matter

Answer 38

Metallic

Question 39

Copper is a good conductor of electricity but a non electrolyte ..why

Answer 39

does not undergo chemical decomp when electric current flows via it `

Question 40

Electrolytes can be classified as strong or weak depending on

Answer 40

degree of dissociation

Question 41

No. of electrons gained at anode =

Answer 41

No. of electrons donated by cathode

Question 42

What is metal activity series otherwise called as

Answer 42

Electrochemical series

Question 43

On what basis is the metal activity series arranged

Answer 43

Ease with which metals lose electrons

Question 44

Elements which ionise _____ and are discharged with ___ are on the top of metal activity series

Answer 44

most readily, difficulty

Question 45

Elements which ionise ______ and are discharged ________ are on the bottom of the metal activity series

Answer 45

with great difficulty, easily

Question 46

State electrochemical series for metals

Answer 46

``` K Ca Na Mg Al Zn Fe Pb H Cu Hg Ag ```

Question 47

State electro chemical series for anions

Answer 47

``` SO4 2- NO3 1- Cl 1- Br 1- I 1- OH 1- ```