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

The energy needed to atomise 1 mol of gaseous ethene, C2H4 is 2087 kJ mol-1. Calculate the average bond enthalpy for a C-H bond given that the bond enthalpy for the C=C bond is +347 kJ mol-1.

3 / 10

The oxidising agent used to extract bromine from sea water in a displacement reaction is:

4 / 10

Bubbling carbon dioxide into an aqueous solution of calcium hydroxide produces a white precipitate of:

5 / 10

What is the oxidation number of CARBON in

CCl4

6 / 10

What is the oxidation number of CARBON in

CO2

7 / 10

Across period 3 from sodium to argon:

(i) the metal with the lowest melting point is sodium

(ii) the element with the highest melting point is silicon

(iii) the non-metal with the lowest melting point is argon

(iv) the melting points of all the non-metals are lower than those of the metals

 

8 / 10

Across period 2 from lithium to neon, the first ionisation enthalpy (energy) of:

(i) oxygen is higher than that of neon

(ii) oxygen is higher than that of nitrogen

(iii) boron is higher than that of beryllium

(iv) beryllium is higher than that of lithium

9 / 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

10 / 10

An example of a p-block element is:

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