Period Table & Energy Random Retrieval

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Period Table & Energy Random Retrieval

This quiz contains all the questions in the Period Table & Energy section. The website will pick 10 questions at random.

1 / 10

For which of these equilibria does a change in pressure have no effect on the yield of substances on the right-hand side of the equation?

(i) CH4(g) + H2O(g) <=> 3H2(g) + CO(g)

(ii) 2HI(g) <=> H2(g) + I2(g)

(iii) 2SO2(g) + O2(g) <=> 2SO3(g)

(iv) H2O(g) + CO(g) <=> H2(g) + CO2(g)

2 / 10

Each of these statements is true. From which statement is it possible to predict, by application of Le Chatelier's principle that the solubility of sodium hydroxide increases with temperature?

3 / 10

The total heat capacity of a calorimeter is 2000 J K-1.

The standard enthalpy of combustion of propane is -2200 kJ mol-1

Calculate the expected temperature rise on heating the calorimeter by burning 0.0500 mol of fuel from a propane burner assuming that all the energy heats the calorimeter.

Take care with units.

4 / 10

Which of the following increase from left to right across the series F2 - Cl2 - Br2?

(i) covalent radius of the atoms

(ii) electronegativitiy

(iii) boiling point

(iv) strength as an oxidising agent

5 / 10

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

6 / 10

The reaction of calcium with water produces:

7 / 10

What is the oxidation number of CARBON in methanol

CH3OH

8 / 10

What is the oxidation number of CARBON in

CO2

9 / 10

In the periodic table the elements are arranged in order of:

(i) atomic number

(ii) mass number

(iii) number of protons in the nucleus

(iv) number of protons and neutrons in the nucleus.

10 / 10

In which of these pairs do both entities have the same electron configuration?

(i) Li and Na

(ii) Na+ and Mg2+

(iii) F- and Cl-

(iv) Cl- and Ar

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