Classify the following reactions?

Question

1)Cs(s)+S8(s)---->Cs2S9(s)

2)nickel(III)nitrate+calcium---->calci... nitrate+ nickel

Answer 1

1) Synthesis or combination. This occurs when two substances combine to produce one substance. Reaction 1) could also be classified as oxidation-reduction.

2) Single replacement. This occurs when a element (Ca) replaces another element (Ni) in a compound. Reaction 2) is also an oxidation-reduction reaction where electrons are lost and gained.