A level Chemistry OCR Salters B 2014 Past Paper

The process used to separate individual groups of hydrocarbons in crude oil is called [blank_start]fractional distillation[blank_end].

What is a structural isomer?

Balance the equation SO2 + [blank_start]2[blank_end]H2O + O2 -> [blank_start]2[blank_end]H2SO4

CO2 is a [blank_start]linear[blank_end] molecule because there are [blank_start]2[blank_end] groups of electrons on both sides of the C atom. They [blank_start]repel[blank_end] each other so they are as [blank_start]far apart[blank_end] from each other as possible. The bond angle is [blank_start]120°[blank_end].

[blank_start]An advantage[blank_end] of nuclear energy compared to fossil fuels is that no CO2 is produced. [blank_start]A disadvantage[blank_end] is the radoiactive waste.

Carbon has [blank_start]covalent[blank_end] bonding and has a [blank_start]giant[blank_end] structure. Sulfur has [blank_start]covalent[blank_end] bonding and has a [blank_start]simple molecular[blank_end] structure.

Bond breaking is [blank_start]endothermic[blank_end]. Bond making is [blank_start]exothermic[blank_end].

At room temp, iodine is a grey [blank_start]solid[blank_end].

Propanone is made from the alcohol, [blank_start]propan-2-ol[blank_end].

In dynamic equilibrium, the rate of the forward reaction is [blank_start]the same as[blank_end] the backward reaction and the concentrations [blank_start]remain constant[blank_end].

In [blank_start]homolytic[blank_end] fission, 2 radicals are formed.