Quiz

BuzzFeed Staff

Science

Warning: This is pretty tough. Based on real <a href="http://www.aqa.org.uk/subjects/science/as-and-a-level/chemistry-7404-7405/assessment-resources" target="_blank">AQA past exam papers</a>.

Warning: This is pretty tough. Based on real AQA past exam papers.

Could You Pass A-Level Chemistry Now?

Atomic radius decreases from left to right across the periodic table.

Which of these atoms has the largest atomic radius?

In structural isomers atoms are arranged in completely different orders. You can't just twist two structural isomers in space to make them look the same again.

What is the definition of a structural isomer?

Thermal cracking requires temperatures in the hundreds of degrees, and tens of atmospheres of pressure.

What reaction conditions are needed for thermal cracking to take place?

This is in contrast to catalytic cracking, which produces It also produces high proportions of branched alkanes.

Complete the sentence:

Hydrogen has one proton, helium has two, and lithium has three. You're given the mass numbers in the question, so you can work out how many neutrons each has from this information. 3H has two neutrons, 4He and 5He have two and three respectively, and 4Li has one neutron.

Which of these atoms has the smallest number of neutrons?

When there's plenty of oxygen, all hydrocarbons burn to produce carbon dioxide and water.

Which of these statements about ethene is correct?

Reduction happens when a substance gains electrons during a chemical reaction, and oxidation is when a substance loses electrons.

Complete this sentence:

A reducing agent is what gives electrons in a redox reaction. Strong reducing agents easily lose electrons.

Which of these is the best reducing agent?

Tollen's reagent determines the presence of an aldehyde.

Which statement about ethanal is correct?

On its own, molecular nitrogen (N2) does not retain heat so is not a greenhouse gas.

Which of these substances does not contribute to the greenhouse effect?

Cobalt atoms lose their two electrons from the 4s orbital when they become a cobalt(II) ion.

Which of these is the full electron configuration of a cobalt(II) ion?

AgCl dissolves to give a colourless solution when aqueous ammonia is added.

Which compound gives a colourless solution when an excess of dilute aqueous ammonia is added?

Sorry, we know this quiz was difficult – but it _was_ multiple choice. You failed.

You'd get an F

Well, you only got three or four right, but it was very difficult! We'll call it a D for now, and you'd better buck your ideas up if you plan to take an actual chemistry A-level any time soon.

You'd get a D

You got about half right, not bad! But it was multiple choice, so a real exam is going to be harder.

You'd get a C

You did better than just random guessing, so either you genuinely know a thing or two about chemistry, or you're really good at guessing. One of those qualities is going to lead you to a good mark in your real A-level chemistry, if you ever take it.

You'd get a B

You got almost full marks, well done! Of course a real exam wouldn't be nine questions long and multiple choice, but you're on the right track for a good mark.

You'd get an A

You got FULL MARKS! Congratulations! Of course a real exam wouldn't be nine questions long and multiple choice, but you're on the right track for a very good mark.

You'd get an A\*

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Could You Pass A-Level Chemistry Now?

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