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A hydrated salt (x) gives golden yellow ...

A hydrated salt (x) gives golden yellow colour in flame test, given basic gas on treatement with `NaOH`, gives yellow ppt. on treatment with `(NH_(4))_(2)MoO_(4)` and `HNO_(3)`. It gives blue bead with `Co^(2+)` salt. The salt (x) is:

A

Na

B

K

C

Ca

D

Ba

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