When Lead Nitrate reacts with potassium iodide, Yellow precipitate of ............. is formed
  • PbI2
  • KNO3
  • Pb(NO3)2
  • PbIO3
Which of the following is not a chemical reaction?
  • Souring of milk
  • Dissolution of sugar in water
  • Rusting of iron
  • Digestion of food in our body
Which of the following is not a thermal decomposition reaction
  • 2FeSO4 →Fe2O3 +SO2 + SO3
  • 2H2O→2H2 + O2
  • ZnCO3→ZnO + CO2
  • 2KClO3→2KCl + 3 O2
Combustion is an .................Process
  • Endothermic
  • Exothermic
  • Both (a) and (b)
  • None of the above
Which of the formula of rust is
  • Fe2O3
  • Fe3O4
  • Fe2O3.nH2O
  • Fe3O4.nH2O
Copper on exposure to air reacts with moisture and carbon dioxide to develop a green layer which is chemically
  • Basic Copper carbonate
  • Copper sulphate
  • Copper Nitrate
  • Copper Oxide
When dilute hydrochloric acid is added to granulated zinc placed in a test tube , the observation made is
  • The surface of the metal turns shinning
  • The reaction mixture turns milky
  • Greenish yellow gas is evolved
  • the colorless and odorless gas evolve
Which of the following is an example of displacement reaction?
  • 2 KClO3→KCl + O2
  • 2H2 + O2 →2 H2O
  • Zn + 2 HCl → ZnCl2 + H2
  • N2 + 3 H2 → 2 NH3
What will happen when we add iron nail into copper sulphate solution
  • Blue color of the solution fades
  • Reddish color appears on iron nail
  • Color of the solution turns green after some time
  • All of these
Burning of magnesium ribbon is a
  • Chemical reaction
  • Exothermic reaction
  • A white color powder forms
  • All of these
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