Chemistry Year 13 Random Retrieval

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Chemistry Year 13 Random Retrieval

This quiz contains all the questions in the year 13 chemistry section. The website will pick 10 questions at random.

1 / 10

Treating ethanal with hydrogen cyanide in the presence of some KCN and then hydrolysing the product with hot hydrochloric acid (which converts a cyano / nitrile group RCN, to RCOOH) produces:

2 / 10

How many peaks would you expect to see in the 13C spectrym of 3-propyl aminobenzene?

 

3 / 10

The decomposition of dinitrogen pentoxide gas into nitrogen and oxygen is first order with respect to N2O5. The units of the rate constant are:

4 / 10

By inspection of this experimental data, what is the rate equation for this reaction?

5 / 10

What is the value of the rate constant, k for this reaction at this temperature?

6 / 10

Consider the following equilibrium for the reaction that generates hydrogen for use in the Haber-Bosch Process:

CH4(g) + H2O(g) <=>CO(g) + 3H2(g)

140 mol of CH4 was mixed with 100 mol of H2O and the mixture given time to reach equilibrium. At this point, 240 mol of H2 was present in the mixture.

Calculate the value of the mole fraction of CH4 present in the mixture under these conditions.

7 / 10

For the equilibrium: CaCO3(s) <=> CaO(s) + CO2(g)

8 / 10

Using oxidation numbers (states) work out the ratio of the species in the following half-equation.

I2 + e- => I-

9 / 10

Using oxidation numbers (states) work out the ratio of the species in the following half-equation.

H2S => S + H+ + e-

10 / 10

Work out the ratio of the species in the following half-equation.

I2 + e- => I-

 

I2 = [1] 1 [2] 2 [3] 3 [4] 4 [5] 5 [6] 6

e- = [7] 1 [8] 2 [9] 3 [10] 4 [11] 5 [12] 6

I- = [13] 1 [14] 2 [15] 3 [16] 4 [17] 5 [18] 6

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