What to know from Chemistry past papers

what do heterogenous and homogenous catalyst do?

Heterogeneous catalysis work by adsorption of reactants onto active sites of catalyst and homogeneous catalyst are in same state as reactants.

what standard free energy change do feasible reactions have

A negative one

H30=OH

Its true for all neutral solution at all temps but pH=7 is only true at 25 degrees

the order of a reaction

can be only determined by an experiment. It doesn’t A depends on the stoichiometry of the overall reaction B is the sequence of steps in the mechanism C controls the speed of the overall reaction

what bonds does Water only contain

Sigma bonds

What is Endothermic

Bond breaking like water becoming a gas

What type of bonding hybridisation occurs in alkanes alkenes and aromatics

Alkanes: Sp3 Alkenes:Sp2 aromatics Sp

What is the difference between trans and cis BP

Trans isomers have higher bp due to them being able to pack much closer together and so higher van-der-waal forces

What is the difference in polarities from cis isomers to trans isomers

Cis is polar and trans is non polar

what is the name given to an isomer which is a mirror image of another molecule?

Enantiomers

In heterolytic fission what are the products

Electrophiles + nucleophiles