Question

Ch-1 Worksheet 1. Fill in the blanks a. The process of evaporation causes cooling. b. The process of cooling glass is known as . c. Liquids have no fixed but have fixed . d. exists in all three states of matter. e. Carbon dioxide is a white solid called at temperature below . 2. State True or False a. Evaporation of water is a bulk phenomenon. b. Diffusion takes place in haphazard and random way. c. SI unit of pressure is Pascal. d. A gas is highly incompressible fluid. e. Solids and liquids can be identified from their characteristic melting and boiling points. 3. Zig-zag movement of the solute particle in a solution is known as (a) Linear motion (b) Circular motion (c) Brownian motion (d) Curved motion. 4. Gases can be liquified by a. increasing pressure b. decreasing temperature c. both (a) and (b) d. decreasing pressure 5. Density of a substance is defined as a. ratio of mass and volume b. product of mass and volume (c) ratio of mass and temperature (d) product of mass and temperature 6. Which of the following is not matter a. Blood b. Humidity c. Electron d. Moon rock 7. Which is more effective in cooling? a. Ice at 0° C b. Water at 0° C c. Water at 100° C d. Ice at 100° C 8. 0° C temperature is equal to____________K 9. The process involving the change of state from solid to gas is called a. melting b. boiling c. sublimation (c) fusion 10. A solid has a. definite volume and no definite shape b. no definite volume no definite shape c. definite shape and volume d. definite shape but no definite volume 11. A liquid has a. definite volume and no definite shape b. no definite volume no definite shape c. definite shape and volume d. definite shape but no definite volume 12. A gas has a. definite volume and no definite shape b. no definite volume no definite shape c. definite shape and volume d. definite shape but no definite volume 13. Which of the following is NOT a property of particles of a matter? (a) The particles of matter are extremely small (b) The particles of matter have spaces betw een them. (c) The particles of matter are in s tationery state. (d) The particles of matter attract each other. 14. Which of the following has minimum spaces among the particles? (a) Solids (b) Liquids (c) Gases (d) None of these 15. During summer, water kept in an earthen pot becomes cool because of the phenomenon o f a. diffusion b. transpiration c. osmosis d. evaporation​

Answer 1

Answer:

true

evaporation

liquid has no fixed shape but fixed volume.

water - liquid, ice-solid, water vapour-gas

dry ice

true

false

true

true.

true

browian motion

c

b

humidity

ice at 0°C

Explanation: