GCSE Chemistry rates, resources, atmosphere

Pollutant caused by high temperatures in car engines

• particulates

• carbon dioxide

• sulfur dioxide

• oxides of nitrogen

ways to sterilise water (choose all that are correct)

• ozone

• chlorine

• UV light

• filtration

fossil fuels are a ____________ resource made from the remains of dead plants and animals millions of years ago.

how can you desalinate water?

• filtration

• distillation

• evaporation

• reverse osmosis

how can you test if water is pure?

• cobalt chloride paper turns pink

• limewater turns cloudy

• drink it

• boils at 100oC

way of extracting metals from low grade ores using bacteria

• bioleaching

• phytomining

• smelting

• electrolysis

how do you calculate mean rate of reaction?

• quantity of reactant used / time taken

• mass at end of reaction

• quantity of product formed / time taken

• mass at end - mass at start

which factor makes collisions happen more energetically?

• increase surface area

• increase temperature

• increase concentration

• use a catalyst

activation energy is the _____________ amount of energy needed for a reaction to occur.

imcomplete combustion produces....

• carbon monoxide

• soot (carbon)

• carbon dioxide

• sulfur dioxide