Index
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IMPORTANT QUESTIONS

  1. Q311 The impacts of crop residue burning are immediate as well as long term. Besides the increase in air pollution and resulting respiratory problems, which one of the following according to you are the immediate noticeable impacts? i. Depletion of soil nitrogen, phosphorus, potassium ii. Ozone layer depletion iii.Loss of microorganisms of the upper layer of the soil iv. Climate change
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  2. Q312 What is sound and how is it produced?
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  3. Q313 (a) Convert a speed of 54 km/hr into m/s. (b) Change the speed of 6 m/s into km/hr. (c) A driver decreases the speed of a car from 25 m/s to 10 m/s in 5 seconds. Find the acceleration of car.
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  4. Q314 Which form of energy is utilised by chlorophyll? In which form is this energy converted during photosynthesis and stored in glucose?
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  5. Q315 What are some food we get from plants? Explain each of them with examples
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  6. Q316 If a weight of 150 N is applied on a surface of area 10 cm x 10 cm, calculate the pressure acting on the surface.
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  7. Q317 The anther contains
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  8. Q318 Which of the following, a rubber ball or a stone of same size, has the more inertia and why?
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  9. Q319 Write the symptoms of disease associated with the following: a) When microbes attack lungs? (b) When microbes attack liver?
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  10. Q320 An athlete is running round a circular track of radius 50 m at 7 ms. How long does it take the athlete to complete one circuit of the track?
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