Chemistry
JAMB 1985
Addition of dilute hydrochloride acid to an aqueous solution of a crystalline salt yield a yellow precipitate and a gas which turned dichromate paper green. The crystalline salt was probably?
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A.
Na2SO4
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B.
Na2S
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C.
Na2S2O3.5H2O
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D.
Na2CO3
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E.
NaHCO3
Correct Answer: Option C
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