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Class 8 Science
Chemical Effects Of Electric Current
Quiz 2
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Which one of the following solutions will not conduct electricity?
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lemon juice
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tap water
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vinegar
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vegetable oil
the effect of current responsible for the glow of the bulb in an electric circuit
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Heating effect of current
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Magnetic effect of current
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Chemical effect of current
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None of these
Match the column
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p -> i, q -> ii, r -> ii , s-> i
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p ->ii, q -> ii, r -> i , s-> i
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p -> i, q -> i, r -> ii , s-> ii
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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?
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Positive terminal
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Negative terminal
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can’t say
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does not matter
In the above question , What material should the other electrode be made of?
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Iron
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Carbon
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Silver
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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?
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(i) and (ii)
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(i) and (iii)
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(ii) and (iii)
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(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,
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Plate A will be connected to negative terminal
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Plate A will be connected to positive terminal
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Plate A can be connected with either + or negative terminal
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None of these
From the above question ,which of the following is true
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Mass of the copper plate at negatively charged terminal decrease
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Mass of the copper plate at negatively charged terminal increases
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Mass of the both plates increased
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Mass of the both the plates remain same
Which of the following metals is used in electroplating to make objects appear shining?
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iron
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chromium
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copper
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aluminium
To protect iron from corrosion and rust, it is coated with
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Tin
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Copper
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Mercury
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Zinc
Which of the following cells use(s) electric current to produce a chemical reaction?
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Dry cell
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Solar cell
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Electrolytic cell
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Galvanic cell
A dry cell
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Converts chemical energy into electrical energy
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converts electrical energy into chemical energy
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converts mechanical energy into electrical energy
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none of these
which of these particles movement makes the flow of electric current
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Protons
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Neutrons
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Electrons
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None of these
when electrodes were immersed in water and current was passed through water. Which of the following things are true
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Bubbles of $O_2$ and $H_2$ are produced
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$O_2$ are formed on Anode
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$H_2$ are formed at Cathode
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All the above
The no. of electrons in an atom is ________to the no. of protons.
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More than
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Equal
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Less than
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Greater and equal
The measure of the amount of electrical current a material can carry or its ability to have a current is called ________.
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Electrical conductivity
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electroplating
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Electrolysis
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Electric current
Which of the following is an example of the conductor.
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Diamond
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Glass
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Copper
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Rubber
Which of the following is an example of a non-electrolyte.
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Calcium
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Milk
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Vinegar
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None of these
The rods through which the current enters and leaves the electrolyte are called?
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Anode
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Electrodes
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Cathode
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None of these
Which of the following is not an electrolyte?
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Tap water
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Sugar solution
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Milk
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Lemon juice
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