#### Full Portion Seven Marks Question Paper

10th Standard

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Science

Time : 02:00:00 Hrs
Total Marks : 105
8 x 7 = 56
1. Deduce the equation of a force using Newton’s second law of motion.

2. Explain the experiment of measuring the real and apparent expansion of a liquid with a neat diagram.

3. Explain about domestic electric circuits. (circuit diagram not required)

4. Suppose that a sound wave and a light wave have the same frequency, then which one has a longer wavelength?
a) Sound
b) Light
c) both a and b
d) data not sufficient.

5. Name the acid that renders aluminium passive. Why?

6. An organic compound ‘A’ is widely used as a preservative and has the molecular formula C2H4O2. This compound reacts with ethanol to form a sweet smelling compound ‘B’.
(i) Identify the compound ‘A’.
(ii) Write the chemical equation for its reaction with ethanol to form compound ‘B’.
(iii) Name the process.

7. Explain the male reproductive system of rabbit with a labelled diagram.

8. Classify neurons based on its structure.

9. 7 x 7 = 49
10. A body of mass 20 x 10-3 kg when acted upon by a force for 4 second, attains a velocity of 100 m/s. If the same force is applied for 2 minutes, on a body of mass 10 kg at rest, what will be its velocity?

11. A convex lens of power +6D and a concave lens of power -4D are combined together ( in contact). Find the power of the combination of two lenses.

12. 100 W bulb draws 680 mA current. How much time will be required to pass 30 C of charge through the bulb?

13. wire is 1m long, 0.4 mm in diameter &has resistance of 20 fl. Calculate its resistivity.

14. How much energy will have been produced if the loss in mass during a fission reaction was 0.025 g?

15. Find the mass of 2.5 mole of oxygen atom.

16. 1.5 g of solute is dissolved in 15 g of water to form a saturated solution at 298K. Find out the solubility of the solute at the temperature.