Read the following chemical equations.
reaction 1: h2s+cl-> 2hcl+s
reaction 2: fe+s-> fes
which of the following statements if true for both the chemical equations?
a) chlorine is reduced in reaction 1 and iron is reduced 2
b) chlorine is oxidized in reaction 1 and iron is oxidized in reaction 2
c) chlorine is oxidized in reaction 1 and iron is reduced in reaction 2
d) chlorine is reduced in reaction 1 and iron is oxidized in reaction 2

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.