CBSE Class 10 Science Question Paper SA1 2010 (2)

CBSE Class 10 Science Question Paper SA 1 2010 (2). Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SECTION  - I

1.      Give  an example of an exothermic  reaction.                                                

2.      Write electronic  configuration of an element  having atomic  number 11.                    

3.      Two resistors  of 20 Ω and 40 Ω are connected in parallel  in an electric  circuit.  How does the current passing  through the two resistors  compare ?

4.      State  the main function of abscisic  acid  in plants.                                      

5.      "Oxidation and reduction processes occur simultaneously."  Justify this statement with the help  of an example.

6.      "Barium  chloride  reacts with  aluminium sulphate to give  aluminium chloride  and a precipitate  of barium sulphate"

(i)      Translate  the above statement into a chemical  equation. 

(ii)    State  two types in which  this  reaction  can be classified.

7.      Write the chemical  name and formula of bleaching  powder. How is  it prepared ?            

8.      Give reason for the following                                                               

(i)      Ionic compounds have usually high melting and boiling points.

(ii)    Metals are good conductors of electricity  whereas non-metals  are not.

9.      State the factors on which the resistance of a cylindrical conductor depends. How will resistance of a conductor change if it is stretched so that its length is doubled ?

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper SA 1 2010 (2).