Foundations in Chemistry Random Retrieval

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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

Which of these conversions are reductions?

(i) CrO42- to Cr2O72-

(ii) CrO42- to Cr3+

(iii) CrO42- to CrO3

(iv) CrO3 to Cr2O3

2 / 10

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

3 / 10

Which of these reactions is an acid-base reaction?

4 / 10

What is the temperature of a 12dm3 sample of gas that contains 7g of nitrogen if it is held at a pressure of 300kPa pressure given that the value of the gas constant R = 8.314 J mol-1K-1?:

5 / 10

What is the volume of 0.020 mol oxygen at 27oC and 100 kPa pressure given that the value of the gas constant R = 8.31 J mol-1K-1?

6 / 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.

7 / 10

Which of these elements consist of a giant structure of atoms joined by covalent bonding?

(i) graphite

(ii) sulfur

(iii) diamond

(iv) iodine

8 / 10

Which of these sets of properties is that of an ionic compound?

9 / 10

10 / 10

What is the molar mass of calcium hydroxide?

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