BMAT – Chemistry questions with verified
answers
enthalpy change? Ans✓✓✓ the difference between the energy of the
reactants and the energy of the products
give 2 examples of endothermic reactions? Ans✓✓✓ electrolysis
thermal decomposition
give 3 examples of exothermic reactions? Ans✓✓✓ burning
neutralisation
displacement
give 4 examples of sedimentary rocks? Ans✓✓✓ limestone
chalk
shale
sandstone
give an example of a condensation polymer Ans✓✓✓ nylon
give two examples of igneous rocks? Ans✓✓✓ basalt and granite
give two examples of metamorphic rocks? Ans✓✓✓ marble and slate
, how are different halides detected? Ans✓✓✓ by the colour of the
precipitation the make with silver
how are the different transition metals identified? Ans✓✓✓ by the
colour of their precipitates
how can you distinguish between alkanes and alkenes? Ans✓✓✓
alkenes cause decolourisation of bromine water (from orange) whereas
alkanes do not
how do you work out how many H atoms an alkane has? Ans✓✓✓
number of carbon atoms doubled and then add 2 (e.g.CH4)
how is number of moles calculated? Ans✓✓✓ mass/relative formula
mass
how is rate of reaction calculated? Ans✓✓✓ measure the amount of
products formed in a certain amount of time
how is the chromatography retardation factor calculated? Ans✓✓✓
distance moved by compound/distance moved by solvent
how is the periodic table arranged? Ans✓✓✓ in increasing atomic
mass
answers
enthalpy change? Ans✓✓✓ the difference between the energy of the
reactants and the energy of the products
give 2 examples of endothermic reactions? Ans✓✓✓ electrolysis
thermal decomposition
give 3 examples of exothermic reactions? Ans✓✓✓ burning
neutralisation
displacement
give 4 examples of sedimentary rocks? Ans✓✓✓ limestone
chalk
shale
sandstone
give an example of a condensation polymer Ans✓✓✓ nylon
give two examples of igneous rocks? Ans✓✓✓ basalt and granite
give two examples of metamorphic rocks? Ans✓✓✓ marble and slate
, how are different halides detected? Ans✓✓✓ by the colour of the
precipitation the make with silver
how are the different transition metals identified? Ans✓✓✓ by the
colour of their precipitates
how can you distinguish between alkanes and alkenes? Ans✓✓✓
alkenes cause decolourisation of bromine water (from orange) whereas
alkanes do not
how do you work out how many H atoms an alkane has? Ans✓✓✓
number of carbon atoms doubled and then add 2 (e.g.CH4)
how is number of moles calculated? Ans✓✓✓ mass/relative formula
mass
how is rate of reaction calculated? Ans✓✓✓ measure the amount of
products formed in a certain amount of time
how is the chromatography retardation factor calculated? Ans✓✓✓
distance moved by compound/distance moved by solvent
how is the periodic table arranged? Ans✓✓✓ in increasing atomic
mass
