the reactant in the equation give in 2na and cl2.
i would say c. petroleum
a is wrong
b is impractical for "mainly used"
d thats too expensive
a matter has distinct properties and composition that never vary. the matter is anything which possesses mass and occupies space. the matter has different characteristics and a distribution that does not change from unit to unit. materials which cannot be disintegrated into simpler materials. each is made of only one kind of atom in subatomic level. for example, a chair, table, and similar everything that has mass and occupies space is matter.