Download CBSE Chemistry Sample Papers Class X (10th) 2009

Sample Paper – 2009

Class – X

1.                  Why does use of ordinary soap cause irritation to skin?            1

 

2.What information is available from the following chemical equation:-          1

 

CaCO₃ + 2HCl      -------->        CaCl₂ + H₂O + CO₂

 

3.What will happen if the solution Hydrogen Carbonate is heated? Give the equation of the reaction involved? 1

 

4.What is the Composition of Aqua regia?                               1

 

5.An element X on burring in air form an oxide XO₂ which when dissolved in water turns blue litmus red. Identify if X is a metal or non – metal Justify your answer?                                           2

 

6.A solution of a substance ‘X’ is used for testing CO_2­. Identify ‘X’. What will be its reaction with Carbon dioxide? Write balanced chemical equation for the reaction.2

 

7.A metal X acquires a green colour coating on its surface an exposure to air.           2

 

1.Identify the metal X and name the process responsible for this change

 

2.Name the green coating formed on the metal?

 

8.  The reaction metal X and Fe₂ O₃ is highly exothermic and is used to join railway 2

                                                              i.      Identify metal X and name the reaction

                                                            ii.      Write the chemical equation of its reaction with fe₂ O₃

2.An organic Compound A is widely used as a preventative in pickles and has a molecular formula C₂ H₂ O_2. This compound reacts with ethanol to form a sweet smelling Compound B5

(a)    Identify the Compound A

(b)   Write the chemical equation with ethanol to from compound B

(c)    How can we get compound A back from B

(d)Name the process and write equations?

(e)Which gas is produced when compound A reacts with washing Soda? Write the chemical equations?

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