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Use of CFC free refrigerators is conside...

Use of CFC free refrigerators is considered as eco friendly. Why?

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This is because chlorofluoro carbon coming out from air conditioner and refrigerator has led to the depletion of ozone layer which protects us from UV rays which can cause many harmful diseases like skin cancer, loss of eyesight etc.
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CPC CAMBRIDGE PUBLICATION-DEPARTMENTAL MODEL QUESTION PAPER - 2-ANSWER THE FOLLOWING QUESTIONS
  1. What similarity is observed in the structures of 'A' and 'B' with resp...

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  2. A student connects a water heater to a 5A electric ciruit. Is this co...

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  3. Use of CFC free refrigerators is considered as eco friendly. Why?

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  4. Write the products obtained when sodium oxide reacts with hydrochloric...

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  5. Does the chemical reaction take place when zinc is added to ferrous su...

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  6. Draw the diagram showing longitudinal section of a flower and label th...

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  7. Explain the mechanism of the cleaning action of soaps.

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  8. How can ethanol be converted into ethanoic acid?

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  9. Draw the diagram of the arrangement of apparatus to show the action of...

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  10. Draw the ray diagram showing myopic eye and correction for myopia.

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  11. Draw the ray diagram showing the recombination of the spectrum of whit...

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  12. “We need to look for alternative sources of energy". Justify this stat...

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  13. Write any two events that occur during photosynthesis.

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  14. Draw the electron-dot structure of a methane molecule,

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  15. In the following circuit, which device can be connected in place of AB...

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  16. Draw the ray diagram showing the image formation by a convex lens, whe...

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  17. The reaction between lead nitrate and potassium iodide solutions is an...

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  18. a) An object is kept between centre of curvature and principal focus o...

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  19. (a) Give any two examples for refraction of light in daily life. Stat...

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  20. In the modern periodic table, 'A' and 'B' are two elements belonging t...

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