reaction 10th
Question 1 What happens when zinc granules are treated with dilute solution of H2SO4, HCl, HNO3 , NaCl and NaOH, also write the chemical equations if reaction occurs. Answer: In the case of the reaction of zinc granules with Sulphuric acid or Hydrochloric acid, a salt is formed - Zinc sulphate or Zinc Chloride respectively - and the Hydrogen gas is released. Zn + H2SO4→ ZnSO4 + H2↑ Zn + 2HCl → ZnCl2 + H2↑ Similarly, Hydrogen gas and Zinc Nitrate is formed when the Zinc granules are treated with HNO3 . Zn + 2HNO3 → Zn(NO3 )2 + H2↑ In the case of NaCl, Zinc being less reactive than Sodium, no reaction occurs. When zinc is made to react with NaOH, it forms Sodium zincate and hydrogen gas. Zn + 2H2O + 2NaOH→ Na2Zn(OH)4 + H2↑ Question 2 On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite, white precipitate is obtained. (a) Write a balanced chemical equation of the reaction involved (b) What other name can be given to this precipitation reaction?...