Chemical Reactions and Equations (Assignment) Blog 7


Chemical Reactions and Equations 
Home Assignments
1. Write the type of reaction and observation that can be made when:                                      
         (a) Iron filling are added to copper sulphate solution.  
         (b) When ferrous sulphate crystals are heated.

    2.Name the reducing agent in the following reaction                                                                               
         3MnO2 + 4 Al --> 3Mn + 2 Al2O3
      (i) Which is more reactive, Mn or Al?

     3. Why is it essential to balance a chemical equation?

    4. Identify the type of reaction taking place in each of the following cases and write the balanced
        chemical equations for the reactions.                

      (i) Calcium hydroxide reacts with sulphuric acid to form calcium sulphate and water.
      (ii) Potassium iodide reacts with lead nitrate to produce potassium nitrate and lead iodide.
 
   5. Name the precipitate formed when aqueous solutions of sodium sulphate and Barium chloride
       are mixed.

         (a) Barium sulphate         (b) Sodium sulphide                                                                                                     (c) Barium hydroxide  (d) Barium sulphide
    6. Which one is not observed when iron nail is dipped into a solution of copper sulphate in                  water?                                                                                                                                          
         (a) A brown material is deposited on iron nail.                                                                                    
         (b) Blue colour of copper sulphate solution fades.                                                                             
         (c) After sometime blue solution becomes greenish.                                                                        
         (d) A blue material is deposited on the iron nail.
    7. On heating Ferrous sulphate crystals we obtain:                                                                               
        (i) A mixture of ferric oxide and sulphur dioxide.                                                                              
        (ii) A mixture of ferrous oxide and sulphur trioxide.                                                                          
        (iii) A mixture of ferric oxide, sulphur dioxide and sulphur trioxide.
        (iv) A mixture of ferrous oxide, sulphur dioxide and sulphur trioxide.
    8.Write equation for the reaction of iron with steam.
 
    9. (i) A solution of substance x is used for testing carbon dioxide. What will be its reaction
     with carbon dioxide? Write balanced equation for this reaction.                 
        (ii) Give an example of combination reaction which is exothermic also.

    10. Write short notes on the following:                                                                                                                    (i)Electrical decomposition (ii) Rancidity  (iii) Oxidising agent
    11. Identify the type of reaction taking place in each of the following cases and
      write the balanced chemical equations for the reactions.   
    (a) Zinc reacts with silver nitrate to produce zinc nitrate and silver.     
    (b) Potassium iodide reacts with lead nitrate to produce potassium nitrate and lead iodide.
   12. (a) Identify the reducing agent in-  4NH3 + SO2 --> 4NO + 6H2O                                                      
         (b) Translate and balance the following chemical questions-                                                         
 
   13. Write and balance the chemical reaction:

(i) Calcium hydroxide solution reacts with dilute nitric acid to give calcium nitrate and    water.                                                                                                                                                                   (ii) Aluminium powder reacts with copper (II) chloride to give aluminium chloride an copper.
 
14. Write the balanced chemical equation of the reaction in which the following change have
      taken place with an example of each:                                                                                           
 
(a) Change in colour (b) Change in temperature (c) Formation of precipitate

15. 2 g of silver chloride is taken in a china dish and the china dish is placed in sunlight for sometime. What will be your observation in this case? Write  the chemical reaction involved in the form of a balanced chemical equation. Identify the type of chemical reaction.

                                    
  


                                                                                 

Comments

  1. Sharon SanthoshApril 23, 2020 at 8:48 AM

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    Sharon Santhosh X-D

    ReplyDelete
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  14. Aaron GariApril 23, 2020 at 9:05 AM

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