CBSE Class 10 Science Sample Paper 2012 Set E

1] What is meant by near point of a human eye?

2] Draw the electron dot structure of CH₃Cl.

3] List any two common methods by which solid wastes of urban areas are disposed off.

4] Mention any two functions of human ovary.

5] Why transfer of energy between various organisms is not so efficient?

6] Two elements 'A' (atomic number 7) and 'B' (atomic number 15) belong to group 15 of the periodic table. Write the electronic configuration of these elements. Which of these will be more electronegative and why?

7] Why do we seek to build dams?

8] To get an image of same size as that of the object by a thin convex lens of focal length 20 cm, where should the object be placed? Draw ray diagram to show image formation in this case. Is the image real or virtual?

9] While sitting in the last row, a student has difficulty in reading the black board clearly. State the defect of vision the student is suffering from. Mention two causes of this defect. Suggest a suitable lens for the correction of this defect.

Please refer to attached file for CBSE Class 10 Science Sample Paper 2012 Set E