The movement of air, vapours of scent and smoke is known as [ ] a) Diffusion b) Effusion c) Vaporisation d) All2. The rate of diffusion of gases is _____ than that of liquids. [ ]a) Lower b) Higher c) Moderate d) Both a and b3. What kind of solution is drinking soda ? [ ]a) Gas in liquid b) Liquid in gas c) Gas in gas d) Solid in liquid4. The forces of attraction between molecules is greatest in the _____ state [ ]a) Liquid b) Gaseous c) Solid d) All5. What is the formula of Potassium permanganate ? [ ]a) KMnO2b) KMO4c) KMnO4d) KMnO6. What do you observe after adding the KMnO4 drop to the 250 ml beaker with water ? [ ]a) There is no change in the beaker b) The water changes to pink in beakerc) Both a and b d) None7. Diffusion is possible only when particles of matter move __________ [ ]a) Continuously b) Not continously c) Constant d) All8. From the below diagram oberve where the NH4Cl ring will be formed. [ ]NH3 NH4Cl NH3a) NH3 end b) Nearly HCl end c) Middle of the tube d) All9. Give an example for liquid-liquid diffusion [ ]a) Alcohol in water b) Salt in water c) Gas in water d) Sugar in water10. How do the particles of the solid distribute the liquid ? [ ]a) Solid particles occupy the space between liquid particlesb) Liquid particles occupy the space between solid particlesc) Solid and Liquid have spacesd) None​