1) Which of these is not a good way to measure the rate of a reaction? a) Measure the amount of gas given off over time. b) Measure the change in mass over time. c) Measure the appearance of product over time. d) Measure the disappearance of product over time. e) Time a colour change f) look at a precipitate forming 2) Which of these affects the number of collisions and the energy of particles? a) temperature b) pressure c) concentration d) surface area 3) A reaction using a solid will happen faster if... a) the same mass of larger chunks are used b) the temperature is decreased c) the same mass of smaller pieces are used d) one small piece is used e) the satalyst is removed 4) an exothermic reaction is one which a) feels cold b) feels hot c) energy is taken in d) energy is given out 5) A cold pack would be made using a) an exothermic reaction b) an endothermic reaction c) a reversible reaction d) a combustion reaction 6) condensation happens when a) a liquid is cooled b) a liquid is heated c) a solid forms d) a gas is cooled 7) what colour are copper sulphate crystals when they contain water? a) white b) red c) purple d) blue 8) what is something which speeds up a chemical reaction but is not used up.. a) a reactant b) heat c) a catalyst d) a scientist 9) Over the course of a reaction the rate changes: a) it gets faster because the particles have more energy b) it gets slower because reactants are used up. c) it does not change as there is no change in collisions or energy 10) What does this sign mean? a) exothermic reaction b) ordinary reaction c) no overtaking d) reversible reaction

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