Matter in Our Surroundings
CBSE:10th (worksheet)
BY Er. ANKIT GUPTA: 8285828850
“The best way to predict your future is to create it.”
YOUTUBE: Apna concept by Ankit Sir BY ANKIT GUPTA:8285828850
1. Which of the following does not impact the evaporation rate?
(a) Insoluble heavy impurities
(b) Wind speed
(c) Surface area
(d) None of the above
2. The kinetic energy of the molecule is directly proportional to the
(a) Atmospheric pressure
(b) Temperature
(c) Both (a) and (b)
(d) None of the above
3. The phenomenon in which solid directly converts to the vapour state is known as
(a) Sublimation
(b) Solidification
(c) Vaporization
(d) None of the above
4. Which of the following is the correct interpretation of dry ice?
(a) It is water in a solid-state
(b) It is water in the vapor state
(c) It is carbon dioxide in a vapor state
(d) It is carbon dioxide in a solid-state
5. What is the boiling point of water at sea level?
(a) 0 K
(b) 100 K
(c) 373 K
(d) None of the above
6. Q6. What was the basic classification of elements in ancient times? Name them.
7. Fill in the blanks and give a suitable reason for your answer
(i) As the temperature rises, particles move ______.
(ii) With an increase in temperature, the kinetic energy of the particles also _______
8. We can break a piece of chalk into small particles on hammering, but it is impossible to break a
piece of iron in the same fashion. Why?
9. Find the density of a handful of sand with a mass of 208 g displacing a volume of 80 mL of water.
10. Why is liquid classified as a fluid?
11. Why does solid ice float on water?
12. By which physical process does the fragrance of burning an incense stick spread all around?
13. Name the physical process responsible for drying wet clothes. Why does the spreading of clothes
increase the rate of drying?
14. Which property of gases helps us in detecting the leakage of LPG gas?
15. Convert the following temperature to the Kelvin scale.
(i) 65 ° CB (ii) 300 ° C
