Q 1109867718.     `"4.08 g"` of a mixture of `"BaO"` and unknown carbonate `MCO_3` was heated strongly. The residue weighed `"3.64 g."` This was dissolved in `"100 mL"` of `"1 N HCl"` The excess acid required `"16 mL"` of `"2.5 N , NaOH"` solution for complete neutralization. Identify the metal `"M."`

JEE 1983
A

`Na`

B

`Al`

C

`Ca`

D

`K`

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