What can we say if the Rf values of a reference and a spot match in all solvents? It's very likely that the mixture contains the reference
compound
It's proven that the mixture contains the reference
compound
It's likely that the mixture's only component is the reference
compound
It's certain that the mixture does not contain the reference
compound
Choose an answer

  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-

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