St Patrick's School Science EOY 2022

93 St. Patrick's School End-Of-Year Examinations 2022 SECTION A: [20 marks] Each question is provided with four possible answers (A, B, C and D). Select the most appropriate answer and shade your choice on the Optical Answer Sheet provided. 1 Which of the following is a precautionary step to take when heating a test tube of water? A Put on safety goggles before heating the test tube B Fill the test tube completely with water before heating. C Hold the test tube of water with bare hands when heating. D Point the mouth of the test tube towards yourself when heating. 2 Three bottles of chemicals with descriptions were found in the laboratory. Which row shows the correct hazard symbol to be pasted on each bottle? I II III IV V ethanol mercury sulfuric acid A II III V B IV III V C IV I II D II I IV 3 A student wants to use a ruler to measure the length of a wooden block. At which position (A, B, C or D) should the student be at to view the reading on the ruler accurately? 4 Which statement is true about a 10 g piece of iron and a 10 g bag of feathers? Given: density of iron is 7.9 g/cm3; density of feathers is 0.0025 g/cm3 A The piece of iron is lighter than the bag of feathers. B The piece of iron is heavier than the bag of feathers. C The iron has a smaller volume than the bag of feathers. D The iron takes up a larger space than the bag of feathers. 5 The following shows some information about 4 materials. • W is left with a mark when it is scratched by X. • Y can be scratched by all the other three materials. • Z can scratch the other 3 materials, W, X and Y. Which row shows the order of hardness of materials W, X, Y and Z, starting from the softest material? softest hardest A W X Y Z B W Z Y X C Y W X Z D Z X W Y 6 Which option correctly completes the statement below? Space 1 can be beaten into sheets because it is Space 2 . Space 1 Space 2 A Aluminium ductile B Brass malleable C Copper ductile D Ceramic malleable

94 7 Carbon dioxide is NOT found in the Periodic Table because it _______________. A is impure B is a mixture C is a molecule of compound D is a gas at room temperature 8 What do elements in the same group of the Periodic Table have in common? A They are all metals. B They are all non-metals. C They have similar chemical properties. D They all burn in air to form compounds. 9 An element X exists as a silvery liquid. X is also a good conductor of heat and electricity. What could element X be? A aluminium B magnesium C mercury D tungsten 10 Which statement regarding the set-ups is true? A Solute can be removed in P, but not in Q. B The solution used in