Which one of the following solutions will not conduct electricity?
  • lemon juice
  • tap water
  • vinegar
  • vegetable oil
the effect of current responsible for the glow of the bulb in an electric circuit
  • Heating effect of current
  • Magnetic effect of current
  • Chemical effect of current
  • None of these
Match the column
class8-science-chapter14-chemical-effect-of-current-mcq-2.png
  • p -> i, q -> ii, r -> ii , s-> i
  • p ->ii, q -> ii, r -> i , s-> i
  • p -> i, q -> i, r -> ii , s-> ii
  • p -> ii, q -> i, r -> ii , s-> i
Ram wants to deposit silver on an iron spoon. He took silver nitrate (AgNO3) solution in a beaker and setup a simple circuit for electroplating. Which terminal of the battery should the spoon be connected to?
  • Positive terminal
  • Negative terminal
  • can’t say
  • does not matter
In the above question , What material should the other electrode be made of?
  • Iron
  • Carbon
  • Silver
  • can be any metal
Why is tin electroplated on iron to make cans used for storing food? (i) Tin is less reactive than iron . (ii) It makes the surface shiny (iii) it makes it look attractive (iv) Tin coating prevents food from coming in contact with iron Which of the following is correct?
  • (i) and (ii)
  • (i) and (iii)
  • (ii) and (iii)
  • (i) and (iv)
Two copper plates  A( impure) and B (pure) is connected by the battery and inserted into copper sulphate solution. For doing the purification of Impure Copper,
  • Plate A will be connected to negative terminal
  • Plate A will be connected to positive terminal
  • Plate A can be connected with either + or negative terminal
  • None of these
From the above question ,which of the following is true
  • Mass of the copper plate at negatively charged terminal decrease
  • Mass of the copper plate at negatively charged terminal increases
  • Mass of the both plates increased
  • Mass of the both the plates remain same
Which of the following metals is used in electroplating to make objects appear shining?
  • iron
  • chromium
  • copper
  • aluminium
To protect iron from corrosion and rust, it is coated with
  • Tin
  • Copper
  • Mercury
  • Zinc
Which of the following cells use(s) electric current to produce a chemical reaction?
  • Dry cell
  • Solar cell
  • Electrolytic cell
  • Galvanic cell
A dry cell
  • Converts chemical energy into electrical energy
  • converts electrical energy into chemical energy
  • converts mechanical energy into electrical energy
  • none of these
which of these particles movement makes the flow of electric current
  • Protons
  • Neutrons
  • Electrons
  • None of these
when electrodes were immersed in water and current was passed through water. Which of the following things are true
  • Bubbles of $O_2$ and $H_2$ are produced
  • $O_2$ are formed on Anode
  • $H_2$ are formed at Cathode
  • All the above
The no. of electrons in an atom is ________to the no. of protons.
  • More than
  • Equal
  • Less than
  • Greater and equal
The measure of the amount of electrical current a material can carry or its ability to have a current is called   ________.
  • Electrical conductivity
  • electroplating
  • Electrolysis
  • Electric current
Which of the following is an example of the conductor.
  • Diamond
  • Glass
  • Copper
  • Rubber
Which of the following is an example of a non-electrolyte.
  • Calcium
  • Milk
  • Vinegar
  • None of these
The rods through which the current enters and leaves the electrolyte are called?
  • Anode
  • Electrodes
  • Cathode
  • None of these
Which of the following is not an electrolyte?
  • Tap water
  • Sugar solution
  • Milk
  • Lemon juice
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