A level chemistry paper 2 questions and answers latest top score.

A level chemistry paper 2 questions and answers latest top score. Silver nitrate+ nitric acid + chloride ions - ANS.White precipitate Silver nitrate+ nitric acid + bromide ions - ANS.Cream precipitate Silver nitrate+ nitric acid + iodide ions - ANS.Yellow precipitate Substances that decolorise bromine water - ANS.Alkenes Electrophiles - ANS.Electron pair acceptors, attracted to electrons e.g H+ NaF and NaCl - ANS.Produces misty fumes with conc sulphuric acid NaBr - ANS.Produces misty and orange/brown fumes with conc sulphuric acid NaI - ANS.Produces misty fumes, purple vapour, bad egg smell with conc sulphuric acid Le chateliers principle - ANS.If a factor affecting the equilibrium is changed the equilibrium will shift to oppose this change Enthalpy change - ANS.The overall temperature change at a constant pressure of a reaction Hess's law - ANS.The overall enthalpy change of a reaction at a constant pressure is independent to the route taken Why does E-Z isomerism occur - ANS.Due to the restriction of the double carbon bond Positional isomers - ANS.The functional group is attached to a different carbon Functional group isomers - ANS.Same atoms arranged into different functional groups e.g cyclohexane and hexene Dative covalent bond - ANS.A bond of shared electrons where both electrons are supplied from one of the atoms Kelvin - ANS.Temperature in degrees Celsius + 273 Metres cubed - ANS.The unit of volume in ideal gas equation Number of particles= - ANS.Number of moles x avogadros constant Linear - ANS.2 bonding pairs, 0 lone pairs, 180 bond angle Trigonal planar - ANS.3 bonding pairs, 0 lone pairs, 120 bond angle Tetrahedral - ANS.4 bonding pairs, 0 lone pairs, 109.5 bond angle Trigonal bipyramidal - ANS.5 bonding pairs, 0 lone pairs, 90 and 120 bond angle Pyramidal - ANS.3 bonding pairs, 1 lone pair, 107 bond angle Bent/ v shaped - ANS.2 lone pairs, 2 bonding pairs, 104.5 bond angle Octahedral - ANS.6 bonding pairs, 0 lone pairs , 90 bond angle T shaped - ANS.2 lone pairs, 3 bond pairs Electronegativity - ANS.The power of an atom to attract the pair of electrons in a covalent bond Standard conditions - ANS.100kPa and 298k Standard enthalpy of formation - ANS.The enthalpy change when 1 mole of a substance is formed from its elements under standard conditions Standard enthalpy of combustion - ANS.The enthalpy change when 1 mole of a substance undergoes complete combustion under standard conditions