9 Metals
Why is gold so often used in jewellery?
It is unreactive
1. Which is the primary gas in the Earth's atmosphere?
Nitrogen
What is the general formula for alkanes?
CnH2n+2
Which of the following is used to measure the voume of a liquid most accurately?
Beaker, Measuring Cylinder, Pipette, Test tube
Pipette
What is the positive test for ammonia gas?
Red litmus paper --> Blue
What is the common method for extracting iron from its ore?
Blast Furnace
What is the main cause of acid rain?
Sulur oxide and oxides of nitrogen
What are the 2 properties that are always the same for 2 members in the same homologous series?
The functional group and The general formula
What are the lines on the measuring cylinder called?
Why is a fractionating column used in fraction distillation?
Further separation of the liquids based on boiling points
Write out the chemical equation for the reaction between zinc and copper sulfate.
Zn + CuSO4 --> ZnSO4 + Cu
What is the chemical test for water? (2 tests)
Cobalt chloride paper
Blue --> Pink
Copper sulfate
White --> Blue
How are immiscible liquids separated?
Separating funnel
What is the consequence of eutrophication?
Less sunlight inside lakes, death of aquatic organisms
Why is cryolite added to the electrolysis of molten bauxite? (2)
Why are catalytic converters used in vehicles?
To convert harmful gases such as oxides of nitrogen and carbon monoxide into n2 o2 and co2
What is the name of the product for the reaction of bromine and ethene? What do you see?
Brown --> Colourless
Dibromoethane
What is the formula of Rf?
Distance travelled by component/Distance travelled by the solvent
What is the name of the ester made from methanol and ethanoic acid?
methyl ethanoate
Which reaction occurs at the cathode during the oxidation of molten aluminium oxide?
Al3+ + 3e- --> Al
What are the steps involved in water treatment?
Sedimentation
Filtration
Charcoal
Chlorination
How do you test for the presence of chloride ions? What would you see?
White ppt
Which of the following metals can be used in sacrifical method of preventing rusting?
Copper, Chromium, Zinc, Gold
Zinc