A) The flow of matter
B) The flow of electrons
C) The flow of protons
D) The flow of chargeView Answer play_arrow
D) IonsView Answer play_arrow
A) Materials that conduct electricity
B) Materials that do not conduct electricity
C) Materials that conduct electricity only at low temperatures
D) Materials that conduct electricity at room temperatureView Answer play_arrow
D) SilverView Answer play_arrow
D)View Answer play_arrow
A) Electrical energy into chemical energy
B) Chemical energy into electrical energy
C) Magnetic energy into electrical energy
D) Electrical energy into mechanical energyView Answer play_arrow
A) It has a positive charge.
B) It has a negative charge.
C) It conducts charge without dissociating.
D) It forms positive and negative ions.View Answer play_arrow
A) Sulphuric acid
B) Nitric acid
C) Hydrochloric acid
D) Citric acidView Answer play_arrow
A) Copper sulphate
B) Zinc sulphate
C) Sulphuric acid
D) Ammonium chlorideView Answer play_arrow
A) Carbon rod
B) Manganese dioxide
C) Manganese dioxide and powdered carbon
D) A metal cap on the carbon rodView Answer play_arrow
A) 1.5 V
B) 30 V
C) 60 V
D) 3 VView Answer play_arrow
A) Some amount of electrical energy is converted into heat energy.
B) Some amount of electrical energy is converted into mechanical energy.
C) Some amount of mechanical energy is converted into electrical energy.
D) Some amount of heat energy is converted into electrical energy.View Answer play_arrow
A) Nickel and chromium
B) Nitrogen and chromium
C) Nitrogen, chlorine and chromium
D) Nickel, chromium and manganeseView Answer play_arrow
D) ElectrochemistryView Answer play_arrow
A) Magnetic effect of current
B) Heating effect of current
C) Chemical effect
D) Conduction of currentView Answer play_arrow
|(i) Consume less electricity|
|(ii) Have longer life|
|(iii) Have more power|
A) Only (i) and (ii)
B) Only (ii) and (iii)
C) Only (i) and (iii)
D) (i), (ii) and (iii)View Answer play_arrow
A) Tap water
B) Distilled water
C) Sea water
D) Rain waterView Answer play_arrow
A) Heating effect of current
B) Magnetic effect of current
C) Conducting effect of heat
D) Chemical effect of currentView Answer play_arrow
D) All of the aboveView Answer play_arrow
A) Lemon juice
C) Sea water
D) Distilled waterView Answer play_arrow
A) Chrome onto tin
B) Iron onto tin
C) Tin onto iron
D) Chrome onto ironView Answer play_arrow
D) MercuryView Answer play_arrow
A) Zinc is cheaper than tin.
B) Tin is toxic.
C) Zinc can prevent iron from coming into contact with water and air.
D) Rusting is prevented even when the zinc layer is broken.View Answer play_arrow
A) Distilled water is a good conductor of electricity.
B) An LED glows even when a weak electric current flows through it.
C) Only hydrated salt solutions conduct electricity.
D) Zinc plating is done to make the object scratch proof.View Answer play_arrow
A) Solid sodium chloride
C) Distilled water
D) Liquid oxygenView Answer play_arrow
A) From positive electrode to negative electrode
B) From negative electrode to positive electrode
C) Both (A) and (B)
D) Cannot be saidView Answer play_arrow
A) In metals/outer electrons are strongly bound to the atom.
B) In metals, outer electrons are loosely bound to the atom.
C) In metals, inner electrons are loosely bound to the atom.
D) In metals, protons can detach from the nucleus and conduct electricity.View Answer play_arrow
A) Tin is less reactive than the metal the can is made of.
B) Tin is cheap.
C) Tin is strong and shiny in appearance
D) Tin is lighter than other metals.View Answer play_arrow
A) copper electrode.
D) zinc electrode.View Answer play_arrow
A) Air absorbs electricity.
B) Air is a bad conductor of electricity.
C) Electricity is discharged into air.
D) Air disperses electricity.View Answer play_arrow
A) give better shining.
B) increase the strength.
C) increase weight.
D) prevent rusting.View Answer play_arrow
A) To check the conductivity of copper sulphate solution.
B) To get iron electroplated.
C) To check the continuity of charge flow in the circuit.
D) To make the electric bulb glow.View Answer play_arrow
C) Chromium plating
D) GalvanizingView Answer play_arrow
A) The ions are free to move about in an electrolyte.
B) The solution which can form ions is used for electroplating.
C) Acids are bad conductors of electricity.
D) An electric bulb glows due to the heating effect of current.View Answer play_arrow
D)View Answer play_arrow
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