CBSE Class 10 Science Question Paper SA 2 2012 Set 04

CBSE Class 10 Science Question Paper SA 2 2012 (4). 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.      Write the structure of Ethyl Alcohol (C₂H₅0H)                                               

2.      What are three "R"s in saving the environment ?                                             

3.      Why is depletion of 0zone layer a cause of concern ?                                        

4.      Which component of white light suffers                                                      

(a)     least deviation

(b)     maximum deviation on passing through a glass prism ?

5.     (a)    What is "power  of accommodation of the eye" ?                                       

b)     What happens to the image distance when the object being viewed is moved away from the eye ?

6.     Account for the following  :                                                                

(a)    Elements C, N, 0 and F are all placed in the second period in the periodic table. 

(b)    Elements of group 17 are monovalent.

7.      (a)    How does Atomic Radius change as we more from left to right in a period ?

(b)    The positions of three Elements P, Q and R in the Periodic table are shown below

Group 15     Group 16    Group 17

………         ………         ………

………         ………             Q

………         ………         ……… P              ………             R

Which one of the three elements is most non - metallic ?

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