Compound a, c11h12o, which gave a negative tollens test, was treated with lialh4, followed by dilute acid, to give compound b, which could be resolved into enantiomers. when optically active b was treated with cro3 in pyridine, an optically inactive sample of a was obtained. heating a with hydrazine in base gave hydrocarbon c, which, when heated with alkaline kmno4, gave carboxylic acid d. identify compounds a, b, and c.

  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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