Foundations in Chemistry Random Retrieval

20

Foundations in Chemistry Random Retrieval

This quiz contains all the questions in the Foundations in Chemistry section. The website will pick 10 questions at random.

1 / 10

Hydrogen is oxidised when it reacts with:

(i) oxygen to form water

(ii) nitrogen to form ammonia

(iii) chlorine to form hydrogen chloride

(iv) sodium to form sodium hydride

2 / 10

The oxidation number of sulfur in sulfuric acid, H2SO4, is:

3 / 10

What is the concentration of a solution of sodium hydroxide that is made by dissolving 20.0g of the solid in water and making the solution up to 250 cm3? (Relative atomic masses: Na = 23, O = 16, H = 1)

4 / 10

Which of these compounds is an acid?

5 / 10

In a close-packed metal structure:

(i) there are no spaces between the atoms

(ii) the atoms are arranged in layers

(iii) the crystal breaks if the layers slide past each other

(iv) each atom touches 12 nearest neighbours.

6 / 10

In which of these molecules do the intermolecular forces arise largely from attractions between temporary dipoles?

7 / 10

What is the bond angle found in BF3?

8 / 10

9 / 10

Calculate the theoretical yield of ethyl ethanoate, CH3CO2C2H5, when 6.9 g ethanol, C2H5OH, reacts with excess ethanoic acid, CH3CO2H.

10 / 10

What is the empirical formula of an oxide of sodium which contains 74.2% sodium?

Your score is

0%