Chemistry help please?

Question

For a single replacement reaction, an element will replace from a compound in aquous solution those elements
a. above it in the activity series b. with lower atomic masses
c. below it in the activit series d. with higher atomic numbers

In the presence of oxygen O2, gold can be expected to
a. rapidly form an oxide b. slowly form an oxide
c. not react d. rapidly form a mettalic hydroxide

In the activity series, oxides of metals below copper
b. do not decompose c. decompose with heat alone
d. are acidic

In activity series, oxides of metals below chromium yield metals when
a. heated wth hydrogen b. cooled below 0degrees celcius
c. combined with oxygen d. added to acids

Since mercury is below coppter in teh activity series, heating HgO will resultl in
a. no reaction b. the formation of a hydroxide
c. the formation og Hg2O d. decomposition

Answer 1

c c c a d