Question

A metal compound x reacts with H2SO4 to produce effervescence the gas produces extinguish a burning candle . If one compound formed is calcium sulphate what is x and gas evolved

Answer 1

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Now to answer your question,
X is Calcium Carbonate or Calcium bicarbonate. Gas evolved is carbon dioxide.

Reaction is
CaCO3 + H2SO4 ------> CaSO4 + H2O + CO2

CO2 shows brisk effervescence.....

Thanks!

Answer 2

A: CaCO3 (Limestone)

Gas: CO2

Equation: CaCO3 + H2SO4 --->

CaSO4 +H2O +CO2

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