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4.2 gm of carbonate of an alkaline earth...

4.2 gm of carbonate of an alkaline earth metal is dissolved in excess of HCl solution by which 1.12L `CO_(2)` gas (measured at 273K and 1 atm) is evolved. If the pure metal crystallises as BCC crystal, then the only correct statement regarding the metal is:
[N_(A) `= 6 xx 10^(23)]`

A

The metal is calcium

B

There are `3 xx 10^(22)` unit cell in 1.2 gm metal.

C

The density of metal is 1.24 `gm//cm^(3)` , if the edge-length of unit cell is `4Å`.

D

The metal forms amphoteric oxide.

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