Question

A metal is found in lab in the form of grey coloured granules.It reacts with dil.H2SO4 to form a gas which ,burns with a pop sound.Identify the metal. It also reacts with caustic soda to librate same gas.Write chemical reaction involved.

Answer 1

Hi friend here is your answer

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The metal is highly reactive Zinc

When zinc reacts with the caauatic soda it forms Sodium Zincate with evolution of the H2 gas

Zn + caauatic soda - - - - > Sodium Zincate +H2


$Zn + 2NaOH + 2H2O - - - - > Na2[ Zn (OH) 4] + H2$


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Answer 2

Zinc is the metal available in grey colored granule form. When zinc reacts with dil.H₂SO₄ it produces hydrogen gas (H₂) along with the formation of zinc sulphate. Zn + H₂SO₄ → ZnSO₄ + H₂ Hydrogen (H2) is the gas that burns with pop sound. When it reacts with caustic soda (NaOH) it forms sodium zincate with the evolution of hydrogen gas. Zn + water + caustic soda → sodium zincate + hydrogen gas Zn + 2H₂O + 2NaOH → Na₂ [Zn (OH) ₄] + H₂