WorksheetsChemical Effects of electric Current
Total questions: 13
Worksheet time: 4mins
Which of the following is inflammable Substances?
Petrol
Wood
Paper
Straw
When a cracker is ignited, a sudden reaction takes place with the evolution of heat, light and sound. Identify the type of combustion?
Explosion
Random combustion
Rapid combustion
Spontaneous combustion
When magnesium ribbon burnt it produce
Magnesium hydroxide
Magnesium oxide
Magnesium chloride
Magnesium sulphate
An electric current can produce
heating effect only.
chemical effect only.
magnetic effect only.
chemical, heating, and magnetic effects.
Which one of the following solutions will not conduct electricity?
lemon juice
vinegar
tap water
toothpaste
The substances which have very low ignition temperature will
Catch fire easily
Will not catch fire
Catch fire after some time
None of these
Tick the chemical effect of elecric current
boiling
motion
electro shock
Electroplating
Which of the following statements is incorrect about the conductivity of water?
Rain water is a good conductor of electricity.
On addition of table salt, water conducts electricity.
On addition of lemon juice, water conducts electricity.
Tap Water is a bad conductor of electricity
the products of combustion are
carbon dioxide
oxygen & water
water and fire
coal burns with _________
flame
only glow
both a & b
none of these
Electroplating prevents
electric current
chemical effect
lightening
rusting
