Question

CHEMISTRY
Activity :Find the composition of commonly used mixtures at home e.g.
(i) Common Salt
(ii) Tincture of Iodine
(iii) Lemonade etc
(iv) Shampoo
(v) Soap (Medicated) etc.
1. Define Matter.
2. Which state of matter has least compressibility?
3. Change the following to Kelvin scale.
a)100 0C b)150C
4. Change the following to Celsius scale.
a)375 k b)218 k
5. Explain different factors that effect evaporation.
6. Why water is cold in earthen pot?
7. Why we feel uncomfortable during humid days?
8. What is Dry Ice?
9. Give two uses of Dry Ice.
10. Define Melting point, Boiling point, Sublimation.
11. What do ypu mean by Latent heat of fusion and latent heat of vaporization?
12. Give an activity to show that particle of matter have spaces between them.
13. Explain the term ‘Diffusion.’
14. Why should we wear cotton clothes in summer?
15. Give reasons:-
a) Why steam causes more severe burns than boiling water?
b)Ice is more effective in cooling than water at 0C?

Answer 1

common salt-water
shampoo - water