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10th Class CBSE Science Solved Question Paper for Examination 2015

Written By Sarah Parker on Wednesday 28 May 2014 | 22:18

10th Class CBSE Science Solved Question Paper for Examination 2015 - All students who will appear in Class 10th examination held in March/April 2015 can find here Science solved model question papers online. These all Multiple Choice Questions (MCQ) will help you for better examination preparation.

1. Why ethanol is used as a fuel?

2. Define accommodation in human eye.

3. Name a synthetic chemical which causes depletion of ozone layer.

4. The electronic configurations of three elements are given below:

X 2
Y 2, 6
Z 2, 8, 2

(i) Which element belongs to the second period of the periodic table?
(ii) Which element belongs to the eighteenth group of the periodic table?

Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. Element X will belong to which group of the periodic table?

6. Write down the disadvantages of burning of fossil fuels.

7. How many isomers of the following hydrocarbons are possible?
(i) C3H8
(ii) C4H10
(iii) C5H12

8. Justify the statement “sexual reproduction is advantageous over asexual reproduction”.

9. What are fossils? How is the age of the fossils determined?

10. What is a monohybrid cross? Draw a Punnet square of a monohybrid cross and write the genotypic and phenotypic ratio obtained in the F2 generation of the monohybrid cross.

11. Find the magnification, if the object is placed at a distance of 20 cm in front of a concave mirror of focal length 40 cm.

12. Find the ratio of refractive indices of two media, if the speed of light in first and second medium is 2 × 108 m/s and 1 × 108 m/s respectively

13. The near point of an elderly person is 50 cm from the eyes. Find the focal length and power of the corrective lens he needs.

14. Write the structural formula of the following:
(i) Hexanal
(ii) Benzene

15. Explain soaps and detergents. Write down advantages and disadvantages of detergents over the soaps also write cleansing action of soaps and detergents.

16. Draw a labelled diagram of an angiospermic flower and germination of pollen on stigma.

17. An object is placed at a distance of 12 cm from a concave mirror of radius of curvature 16 cm. Find the position of the image.
(a) Find the position of the image.
(b) Is the image real or virtual?
(c) Find the size of the image.
(d) Is the image erect or inverted?

Keep watch this section. Our Editorial Team will provide you all questions answer very soon....

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