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Quiz about Chemistry for Geniuses
Quiz about Chemistry for Geniuses

Chemistry for Geniuses Trivia Quiz


If you think you are good at chemistry then try this quiz.

A multiple-choice quiz by Sohaib. Estimated time: 5 mins.
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Author
Sohaib
Time
5 mins
Type
Multiple Choice
Quiz #
177,246
Updated
Dec 03 21
# Qns
10
Difficulty
Difficult
Avg Score
5 / 10
Plays
2977
- -
Question 1 of 10
1. The purity of an ester can be checked from which of its properties before being used as a food flavouring? Hint


Question 2 of 10
2. Three of these substances have a macromolecular structure. Which is the odd one out? Hint


Question 3 of 10
3. One of these atoms has the same electronic configuration as the strontium ion. Which one? Hint


Question 4 of 10
4. If an 8g sample of oxygen has the same number of atoms as 16g of element X, which of these is the relative atomic mass of X? Hint


Question 5 of 10
5. In the right conditions, hydrochloric acid can react with each of the listed substances. Which reaction gives a colourless solution only? Hint


Question 6 of 10
6. After acidification with dilute nitric acid, a colourless solution of which substance reacts with aqueous silver nitrate to give a white precipitate? Hint


Question 7 of 10
7. Which of these gases is used to speed up the ripening of fruit? Hint


Question 8 of 10
8. Which metal is the most malleable? Hint


Question 9 of 10
9. Using which of these is the best way to distinguish between ethane and ethene? Hint


Question 10 of 10
10. The manufacture of plastics is causing a reduction in which of these natural resources? Hint



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Most Recent Scores
Mar 17 2024 : Guest 75: 5/10
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Quiz Answer Key and Fun Facts
1. The purity of an ester can be checked from which of its properties before being used as a food flavouring?

Answer: boiling point

A pure compound has a fixed boiling point at a fixed pressure. An impure ester would have a range of boiling points.
2. Three of these substances have a macromolecular structure. Which is the odd one out?

Answer: sodium chloride

Sodium chloride has a giant ionic structure consisting of a lattice of positive and negative ions. These are held in position by strong electrostatic forces of attraction.
3. One of these atoms has the same electronic configuration as the strontium ion. Which one?

Answer: krypton

Both Sr(2+) (strontium) and Kr (krypton) have the same number of electrons (36) and therefore should have the same electronic configuration.
4. If an 8g sample of oxygen has the same number of atoms as 16g of element X, which of these is the relative atomic mass of X?

Answer: 32

The calculation is as follows:

The number of moles of oxygen is 8/32 simplified to 0.25
The number of atoms in the oxygen sample is 2(0.25) equal to 0.5

Since the number of moles of oxygen atoms is the same as the number of moles of X atoms:

The number of moles of X atoms => 0.5 = 16/relative atomic mass, so the
relative atomic mass = 16/0.5 = 32
5. In the right conditions, hydrochloric acid can react with each of the listed substances. Which reaction gives a colourless solution only?

Answer: potassium hydroxide

Potassium hydroxide is neutralized by the acid to form a colourlesspotassium chloride solution.
6. After acidification with dilute nitric acid, a colourless solution of which substance reacts with aqueous silver nitrate to give a white precipitate?

Answer: silver chloride

As it is a colourless solution, it does not contain transition metal ions. The white precipitate is likely to be silver chloride.
7. Which of these gases is used to speed up the ripening of fruit?

Answer: ethylene

The gas is created naturally by fruits as they ripen and producers can hurry up the process by artificial means. Placing unripe fruit in a paper bag at home will have the same effect.
8. Which metal is the most malleable?

Answer: gold

Gold can be hammered out very thinly to cover a large area due to its malleability.
9. Using which of these is the best way to distinguish between ethane and ethene?

Answer: aqueous bromine

Ethene is an unsaturated hydrocarbon that will undergo an addition reaction with bromine to form a colourless solution.
10. The manufacture of plastics is causing a reduction in which of these natural resources?

Answer: fossil fuels

The raw materials used to manufacture plastics are derived from petroleum, a fossil fuel.
Source: Author Sohaib

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