Re-treading is
used for the recycling of……
a) car batteries
b) motor oils
c) tyres
d) metals
Chemical name
of vitamin C is:
a) ascorbic acid
b) magnesium silicate
c) acetylsalicylic acid
d) sodium bicarbonate
Substances on the left hand side of a chemical equation are called…………...
a) Electrons
b) Groups
c) Products
d) Reactants
The new substances formed as a result of chemical reaction are called…………..
a) Electrons
b) Groups
c) Products
d) Reactants
Formation of water needs:
a) hydrogen
b) oxygen
c) a spark
d) all of these
6CO2 + 6H2O -------------> C6H12O6 + ……….
a) O2
b) 3O2
c) 6O2
d) none of these
