CBES Board Class 9/Electrochemistry Multiple Choice Questions Class 9 Sample Test,Sample questions

Question:
 An electrochemical cell is also called

1. battery cell

2. galvanic cell

3.cell

4. chargeable cell


Question:
 In a dry cell the anode is made up of


1. zinc

2.calcium

3.sodium

4.graphite


Question:
 In thermal power stations carbon atoms undergo oxidation to form



 

1. CO2

2.CO

3.H2O

4.O2


Question:
 The oxidation state of any free element is always

1.1

2.2

3.3

4.0


Question:
A concentrated aqueous solution of sodium chloride is called




1.aqueous solution

2.salt solution

3.brine

4.lemonade


Question:
A physical or chemical process that occurs by itself is called

1. non spontaneous

2. self occurring process

3. spontaneous process

4. thermodynamic process


Question:
A reactant containing the element that is oxidized is called

 

1. reducing agent

2. oxidizing agent

3. hydrogen

4. sublime


Question:
An electrolytic cell uses electrical energy to drive

1. chemical reaction

2.physical reaction

3. no reaction

4. biochemical reaction


Question:
As compare to iron aluminum has

 

1. higher tendency to oxidize

2. less tendency to oxidize

3. equal tendency to oxidize

4. all of above


Question:
By losing one or two electrons the atoms of metal are


1. oxidized

2. reduced

3.hydrogenated

4.sublimated


Question:
Conditions for good electroplating are

 

1. high current density

2. low temperature

3. high concentration of metal in electrolyte

4. all of above


Question:
Corrosion can be prevented by


1. Alloying

2.Tinning

3.Galvanizing

4. all of above


Question:
Electrochemical cells convert which of these into electrical energy?

1. mechanical energy

2. potential energy

3. kinetic energy

4. chemical energy


Question:
Electrolysis of brine produces

 

1. chlorine gas

2. hydrogen gas

3. sodium hydroxide

4. all of above


Question:
Electrolytes convert electricity in




 

1. solid state

2.liquid state

3.gaseous state

4.plasma state


Question:
Galvanic cells are also named as

 

1. electrolytic cells

2. battery cells

3. Daniel cells

4. John cells


Question:
In chromium plating few drops of Sulphuric acid are added to the electrolyte to prevent



1. oxidation

2.reduction

3.hydrolysis

4.sublimation


Question:
Lead and Zinc metals occur naturally as

1. oxides

2. sulphite ores

3. carbon ores

4. chloride ores


Question:
Loss of hydrogen atoms by an element is called

 

1. hydrogenation

2. oxidation

3. reduction

4. sublimation


Question:
On an industrial scale sodium metal is prepared by electrolysis of fused



 

1. NaOH

2. NaCl

3.NaO

4.NH3


Question:
Oxidation-reduction reaction involves

 

1. transfer of neutrons

2. transfer of protons

3. transfer of electrons

4. all of above


Question:
Rusting of iron occurs due to



1. reduction

2.hydrogenation

3.oxidation

4. sublimation


Question:
The electrodes used in the production of sodium metal are

1. iron cathode and graphite anode

2. sodium cathode and carbon anode

3. aluminum cathode and fluoride anode

4. aluminum cathode and sodium anode


Question:
The electrolyte among the following is

 

1. NaOH

2. urea

3. glucose

4. benzene


Question:
The electrolyte used for tin plating is



 

1. sulphide ore

2.stannous sulphate

3.hydrogen sulphate

4. sodium chloride


Question:
The element reduced in following reaction 2Ca + O2 2CaO is

1. Ca

2.O2

3. CaO

4. none of above


Question:
The elements whose oxidation number is increased are

1. reduced

2. hydrogenated

3. oxidized

4.oxygenated


Question:
The oxidation state of group IIIA metals is


 

1. -3

2. 3

3.0

4.1


Question:
The process in which substance gains electrons is called
 

1. oxidation

2. hydrogenation

3. sublimation

4. reduction


Question:
The process used to deposit one metal over another metal is called


 

1. electrolysis

2. electroplating

3.carbon plating

4. none of above


Question:
Voltaic cells generate electricity by

 

1. spontaneous redox reaction

2. non spontaneous redox reaction

3. sublimation reaction

4. thermochemical reaction


Question:
When zinc is plated on steel the anode is made up of

1. steel

2.oxygen

3.zinc

4. carbon


More MCQS

  1. CLASS 9 FUNDAMENTALS OF CHEMISTRY MCQS
  2. FUNDAMENTALS OF CHEMISTRY MCQS class 9 SET 2
  3. Electrochemistry Multiple Choice Questions Class 9
  4. PHYSICAL STATES OF MATTER MCQS CLASS 9
  5. Solutions Multiple Choice Questions CLASS 9
  6. STRUCTURE OF ATOMS MCQS CLASS 9
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