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Oak National Academy
12 questions
When magnesium reacts with acid, hydrogen gas is produced which we can collect in a test tube. To test if it is hydrogen, we hold a burning splint to the test tube and hear a ___.
Some metals, like gold and platinum, are found in their native state in nature, and nothing much happens when other chemicals are added. We call these metals very ___.
The higher the position of a metal in the reactivity series, the more ___ it is likely to react.
The thermite reaction needs a bit of input of energy before it starts, but then releases energy and is so ___ that it can weld railway lines.
Some reactions are slow, whereas other reactions are much faster. Hydrogen and oxygen do not react with each other spontaneously. What would it need to make them react?
Metal A is more reactive than metal B. What type of reaction would take place if metal A is added to a solution of a salt of metal B?
Some substances simply do not react with each other, e.g. platinum and water. In others you can see a spontaneous reaction but it is very slow: e.g. ___ of hydrogen peroxide to water and oxygen.
Metals and metal salts are good catalysts. This is not just because there are so many metals. They have specific characteristics, or ___, that make them so suitable as catalysts.
A catalytic converter efficiently converts unwanted combustion products (e.g. CO, C, NOx) into CO_2 and N_2. Why are these two gases preferred over the other substances?
Why do living cells bother changing hydrogen peroxide to water and oxygen, and why do they use a catalyst?
Match the following key terms to their definition.
Why is the lock and key model a good model of an enzyme?
