Choose the correct statement(s):

B e C O_{3}

is kept in the atmosphere of

C O_{2}

since, it is least thermally stable

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B e

dissolves in an alkali solution forming

[B e (O H)_{4}]^{2 -}

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B e F_{2}

forms complex ion with

N a F

in which

B e

goes with cation

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B e F_{2}

forms complex ion with

N a F

in which

B e

goes with anion

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Solution

The correct options are
A $B e C O_{3}$ is kept in the atmosphere of $C O_{2}$ since, it is least thermally stable
B $B e$ dissolves in an alkali solution forming $[B e (O H)_{4}]^{2 -}$
D $B e F_{2}$ forms complex ion with $N a F$ in which $B e$ goes with anion
(a) We know stability of carbonates increases down the group. So, $B e C O_{3}$ is most unstable of all the carbonates of $2^{n d}$ group and kept in the atmosphere of $C O_{2}$ .
(b)
$B e + N a O H + H_{2} O \to N a_{2} [B e (O H)_{4}] + H_{2}$
(c)
$B e F_{2} + 2 N a F \to N a_{2} [B e F_{4}]$

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