Question

I. Note down the observable changes that are likely to be seen in the following chemical reactions:

1. Reaction between lead nitrate solution and potassium iodide solution.
Pb(NO3)2(aq) + 2KI → PbI2(s) + 2KNO3(aq)
 
 2. Action of dil. sulphuric acid on zinc.
  Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2
 
 3. Action of barium chloride on sodium sulphate.
BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq)

4. Heating Copper carbonate  
   CuCO3 à CuO + CO2
​

Answer 1

Answer:

"acid"

Explanation:

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