Chemical reaction result in _________________ change
Temporary
Permenant
Periodic
Natural
Sugar when heated liberates _________________ and water.
Carbon
Magnesium
Calcium
Protein
New substances are produced in ________________ change.
None of these
Occurring of day and night is a _______________ change.
Non periodic
State
Physical
Copper combines with _________________ to form copper oxide.
Oxygen
Oxide
Ozone
Dioxide
What is liberated when sodium reacts with water
Hydrogen
Oxone
Sodium
In a cell, chemical energy is converted into _________________.
Weal energy
Light energy
Electrical energy
Rusting of iron takes place faster with the contact of
Water
Air
Common salt
Oil
________________ are written on the left side of the chemical equation.
Products
Reactants
Pollutions
Acids