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1.Which of the following processes causes the distance between the particles to increase the most?

• Melting

• Freezing

• Sublimation

• condensation

2.Which statements describe the arrangement of particles in solids?

• particles are moving in all directions

• Particles are arranged in neat rows

• particles can move past each other

• particles vibrate about their positions

3.Bleach spilled on the kitchen floor and after sometime whole kitchen smelled of bleach. Which process occurred?

• Evaporation and brownian motion

• Diffusion

• Evaporation

• Evaporation and diffusion

1. Oxygen diffuses .......... than fluorine as its .............. is less than that of the fluorine

1. Which apparatus is used to measure 23.4ml ?

• measuring cylinder

• pipette

• glass syringe

• Burette