Chemistry
Chemistry Knowledge Challenge
Test your understanding of chemistry concepts with our engaging quiz designed for enthusiasts and students alike. Answer a series of multiple-choice questions that will challenge your knowledge of the periodic table, chemical reactions, and more.
Whether you are a budding chemist or just looking to brush up on your skills, this quiz offers:
- 10 thought-provoking questions
- Instant feedback on your answers
- An opportunity to learn while you play!
Gases are separated from liquid air by fractional distillation. The boiling points of four gases are shown. Which gas is both monoatomic and a liquid at –200 C?
Argon –186
Helium –269
Neon –246
nitrogen –196
In which molecule are all the outer shell electrons from each atom used to form covalent bonds?
CH4
Cl 2
H2O
NH3
What is the balanced chemical equation for the reaction between calcium and water?
Ca + H2O CaOH + H2
Ca + H2O Ca(OH)2 + H2
Ca + 2H2O CaOH + H2
Ca + 2H2O Ca(OH)2 + H2
A compound has the formula XF2 and has a relative mass of 70. What is element X?
Gallium
Germanium
Sulfur
ytterbium
Three substances are electrolysed using inert electrodes. Which substances produce hydrogen at the negative electrode? 1 concentrated hydrochloric acid 2 concentrated aqueous sodium chloride 3 dilute sulfuric acid
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
Fuels release heat energy when they burn. Which substances are used as fuels? 1 argon 2 butane 3 hydrogen 4 methane
1 and 3 only
1, 3 and 4
2, 3 and 4
2 and 4 only
Which property is shown by the alkali sodium hydroxide?
It has a pH less than pH 7.
It produces a gas when it is warmed with ammonium chloride
It turns blue litmus red.
It turns universal indicator green.
When aqueous sodium hydroxide is added to a solution of a metal ion, a grey-green precipitate forms, which dissolves in excess to form a dark green solution. What is the identity of the metal ion?
Chromium(III)
Iron(II)
Iron(III)
Copper(II)
Which statements describe the Periodic Table? 1 The elements are arranged in order of their nucleon number. 2 The elements are arranged in order of their proton number. 3 It is used to predict the properties of elements.
1 and 3
1
2,3
2 only
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