The Law of Conservation of Mass in a Chemical Reaction
1)Which scientist established the Law of Conservation of Mass?
  

2)Which one of the following is the correct statement of Law of Conservation of Mass?
  

3)To identify the Law of Conservation of Mass, a student added 10 ml of 5% barium chloride solution into 10 ml of 5% sodium sulphate solution. Which one of the following is the correct observation?
  

4)In a chemical reaction, one molecule of nitrogen reacts with three molecules of hydrogen to form ammonia. If the Law of Conservation of Mass is correct, what will be the number of atoms of nitrogen and hydrogen at the end of the reaction?
  

5)Which one of the following combinations can a student select to prove the Law of Conservation of Mass?
  

6)While verifying the Law of Conservation of Mass, a student added 5 g of sodium bicarbonate to a test tube containing 14.5 g acetic acid. The total mass of the reactants is 19.5 g. But the mass of the product after the reaction is only 16.2 g. The reduction in the mass of the product is due to:
  

7)Which one of the following reactions is not suitable in the laboratory to verify the Law of Conservation of Mass?
  

8)In a chemical reaction, iron reacts with chlorine gas to form ferric chloride. If the Law of Conservation of Mass is correct, what is the number of Fe and Cl atoms at the beginning of the reaction?
  

9)Observe the following picture given below.If this reaction obeys the Law of Conservation of Mass, what will be the mass of the product?
  

10)To verify the Law of Conservation of Mass, barium chloride is not available. Which one of the following combinations can a student select to prove the Law?
  


  


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