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

Which of these systems is NOT in a state of dynamic equilibrium?

3 / 10

The value that you obtain for the enthalpy of combustion ΔcH of liquid ethanol using mean bond enthalpies is different from the value obtained experimentally, or by using enthalpy of formation ΔfH of liquid ethanol.

What is the most significant reason for this?

4 / 10

Which of these comparative statements are true?

(i) a calcium atom is larger than a calcium ion

(ii) a calcium atom has a larger radius than a magnesium atom

(iii) calcium has a smaller first ionisation energy than magnesium

(iv) a calcium ion is smaller than a magnesium ion

5 / 10

Which of these ions has the greatest polarising power?

6 / 10

What is the oxidation number of SULFUR in

S2O32-

7 / 10

What is the oxidation number of NITROGEN in

NaNH2

8 / 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.

9 / 10

In the periodic table a periodic pattern is:

10 / 10

An element which is a solid at room temperature consisting of molecules is:

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