1) Mass = 1 Charge = +1 What is this describing? a) Electron b) Proton c) Neutron 2) Which of these gives the correct number of protons, neutrons and electrons in order? Mass number = 23 Atomic number = 11 a) 12, 12, 11 b) 12, 11, 12 c) 11, 11, 12 d) 11, 12, 11 3) Which of these is the correct sequence for the mass spectrometer? a) ionisation, deflection, acceleration, detection b) ionisation, acceleration, detection, deflection c) ionisation, acceleration, deflection, detection d) vaporisation, detection, ionisation, deflection 4) According to this mass spectrum, what is the Mr of pentane? a) 72 b) 57 c) 29 d) 43 5) Iron has two major isotopes, 55 and 56. What is the relative abundance of the iron 55 isotope, if the average mass is 55.8? a) 20 b) 40 c) 60 d) 80 6) Substance 'Y' has an empirical formula of CH2 and an Mr of 42. What is its molecular formula? a) C2H4 b) C3H6 c) C3H8 d) C4H8 e) C5H10 7) If a gas occupies 250 cm3, what is its volume in m3? a) 2.50 b) 0.00025 c) 0.250 8) 1 mole of gas occupies 24dm3 at 298K. What volume of gas will be occupied by 8g of O2? (Ar of O = 16) a) 4 b) 6 c) 8 d) 12 9) What type of bonding is present in silver? a) covalent b) ionic c) metallic 10) Which of these would not be ionic? a) NaCl b) CuO c) CO2 d) MgF2 11) What does melting water involve? a) Breaking covalent bonds b) Overcoming electrostatic attractions c) Overcoming intermolecular forces 12) Which period 3 element has a giant covalent structure? a) Carbon b) Sulfur c) Silicon d) Nitrogen 13) What would the shape be for SiCl4? a) Linear b) Tetrahedral c) Square planar d) Trigonal bipyramidal 14) What is the bond angle in this molecule? a) 90o b) 90o and 120o c) 109.5o 15) What is the bond angle if there are only 3 bonding pairs of electrons arround a central atom? a) 90o b) 120o c) 109.5o 16) A moleculehas a formula C4H8 and does not react with bromine water. This suggests it is: a) An aldehyde b) An alkene c) An alkane d) A cycloalkane 17) Which of these is not a property of a homoloogous series? a) Similar chemical properties b) Boiling point increases with size c) Each molecule is CH bigger than the last d) Same functional group 18) What is the chemical used to remove SO2 from waste gases? a) CaCO3 b) CaSO3 c) CaNO3 19) How many O2 molecules would be needed for the complete combustion of C3H8? a) 3 b) 4 c) 5 d) 6 e) 7 20) Which are the correct major products for catalytic cracking? a) Branched alkanes and aromatic hydrocarbons b) Mostly ethene and other alkenes c) Aromatic hydrocarbons and ethene

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