1) What colour will a weak acid make universal indicator turn? a) green b) blue c) yellow d) red 2) The list below shows the best pH range for the healthy growth of some common plants. Which of the plants would grow well in an alkaline soil? a) cabbage 7.5–8.0 b) broad beans 5.5–6.5 c) potatoes 4.5–6.5 d) tomatoes 5.5–7.0 3) If you heat a piece of copper, its mass goes up because: a) it rusts b) metals expand when they are hot. c) heating metals produces carbon dioxide. d) it has reacted with oxygen from the air. 4) calcium carbonate ==> calcium oxide + carbon dioxide. What type of chemical reaction is this? a) combustion b) oxidation c) reduction d) thermal decomposition 5) What does Iron need to rust? a) Water b) Carbon dioxide and Water c) Oxygen d) Oxygen and Water 6) Which of these is an oxidation reaction? a) Magnesium + Sulphur ==> Magnesium sulphide b) Magnesium + Oxygen ==> Magnesium oxide c) Magnesium + Iron oxide ==> Magnesium oxide + Iron d) Magnesium carbonate ==> Magnesium oxide + Carbon dioxide 7) Compared to non-metals, metals are: a) good conductors of heat but not electricity. b) good conductors of electricity but not heat. c) good conductors of both heat and electricity. d) not good conductors. 8) Which of these describes some properties of most metals? a) They cannot be shaped or pulled into long thin wires. b) They are all liquids, have high melting points and conduct electricity. c) They ring when hit, are shiny and most are solids. d) They are all brittle and break when you try to bend them or hit them. 9) When some acid is put onto a piece of metal: a) there is always a reaction which burns a hole in the metal. b) there is never a reaction. c) some metals will react with the acid and produce bubbles of gas. d) there is always a reaction, which produces a powder. 10) Which of the following is the correct way to test for hydrogen gas? a) Bubble the gas through limewater. b) Bubble the gas through universal indicator solution. c) Put a glowing splint into a tube of the gas (the splint will burn brightly). d) Put a burning splint into a tube of the gas (the gas will explode with a squeaky pop). 11) Which is the correct test for Oxygen gas? a) Bubble the gas through limewater. b) Bubble the gas through universal indicator solution. c) Put a glowing splint into a tube of the gas (the splint will relight) d) Put a burning splint into a tube of the gas (the gas will explode with a squeaky pop). 12) What do you think will happen to a lit splint when you add it to oxygen gas? a) it will go out b) it will relight c) it will burn brighter d) it will make a squeeky pop 13) What do you think will happen when you bubble oxygen through limewater? a) It will turn cloudy b) It will turn red c) It will turn blue d) It will have no effect 14) What do you think will happen when you add a burning splint to carbon dioxide gas? a) It will make a squeeky pop b) it will burn brighter c) it will go out d) it will have no effect 15) Look at these diagrams, and then choose the correct order of reactivity for metals X, Y and Z (the most reactive metal should be first). a) Z, X, Y b) Y, Z, X c) X, Y, Z d) Z, Y, X 16) Which of these is a compound and why? a) Oxygen because it has one type of atom b) Sodium chloride because it has two types of atoms c) Hydrogen because it has twp types of atom d) Water because it has lots of atoms in in 17) What is the name of a compound formed when an acid reacts with a carbonate or an alkali? a) a metal b) a solovent c) a mixture d) a salt 18) If a piece of iron rusts what will happen to its mass? a) It will increase b) It will decrease c) It will stay the same d) You can't tell

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