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Give reason for the following observatio...

Give reason for the following observations: Naphthalene balls disappear with time without leaving any solid.

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MBD-MATTER IN OUR SURROUNDINGS-Example
  1. Convert the following temperatures to the Kelvin scale : 25^@ C

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  2. Convert the following temperatures to the Kelvin scale : 1373^@ C

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  3. Give reason for the following observations: Naphthalene balls disappea...

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  4. Give reason for the following observations : We can get the smell of ...

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  5. Arrange the following substances in increasing order of forces of attr...

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  6. What is the physical state of water at :25^@C

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  7. What is the physical state of water at :0^@ C

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  8. What is the physical state of water at :100^@ C

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  9. Give two reasons to justify that :Water at room temperature is a liqui...

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  10. Give two reasons to justify that :An iron almirah is a solid at room t...

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  11. Why is ice at 273 K more effective in cooling than water at the same t...

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  12. What produces more severe burns : boiling water or steam ?

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  13. Name A, B, C, D, E and F in the following diagram showing state change

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  14. Give important characteristics of solid state.

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  15. Give important characteristics of the liquid state.

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  16. Give important characteristics of gas.

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  17. Give the main postulates of kinetic theory of matter.

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  18. Distinguish between solids, liquids and gases.

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  19. How will you explain the three states of matter on the basis of Kineti...

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  20. Define the terms given below and answer the questions associated with ...

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