CBSE Class 10 Science Question Paper SA 2 2012 (3)

CBSE Class 10 Science Question Paper SA 2 2012 (3). 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  - A

1.      Name the part of the human eye that helps in changing the focal length of the eye lens.

2.      Write the next higher homologue of the following  : (i)      C₃ H₆            (ii)     C₅H₈

3.      Select the biodegradable wastes from the following  : DDT, Crop's residue, Leather and glass

4.      In a food chain consisting of snake, insect, grass and frog, assign an appropriate trophic level to frog

5.      What is the cause of dispersion of white light passing through a prism ?  Which colour of light deviates the -

(i)      most ;        (ii)     least

6.      Why does the clear sky appear blue ? How  would  the sky appear in the absence of earth's atmosphere ?

7.      How can you identify  the three types of mirrors without  touching ?

8.      An element has electronic configuration  2, 8, 3.  What is the atomic number of this element ? To which 

(i)  group and   (ii)  period this element belong ?

9.      How does atomic size vary in a group from top to bottom and in a period from left to right  ? Explain.

10.   Name those parts of a flower which serve the same function as the following  do in the animal :-

(i)      Testis        (ii)     Ovary        (iii)    Eggs          (iv)    Sperms

11.   What are fossil fuels ? How are they formed ?

12.   What is ozone ? How does it protect the organisms on the Earth ?

13.   What are sexually transmitted diseases  ?  Name an STD which damages the immune system of human body ?

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper SA 2 2012 (3).