Chemistry Random Retrieval Y12

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Chemistry Year 12 Random Retrieval

This quiz contains all the questions in the year 12 chemistry section. The website will pick 10 questions at random.

1 / 10


Choose one of the following options:

2 / 10

What is the oxidation number of SULFUR in

SO42-

3 / 10

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

4 / 10

5 / 10

A chloride ion and an argon atom have the same:

(i) number of protons

(ii) number of electrons

(iii) atomic number

(iv) electron configuration

6 / 10

What is the bond angle found in water?

7 / 10

What is the bond angle found in SO42-?

8 / 10

Typically metal elements, unlike most solid non-metal elements:

(i) are shiny

(ii) conduct electricity

(iii) bend and stretch without breaking

(iv) have low tensile strength.

 

9 / 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.

10 / 10

Which of these processes are endothermic?

(i) water freezing

(ii) ethanol evaporating

(iii) steam condensing

(iv) wax melting

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20

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 gases behaves very much like an ideal gas at room temperature and pressure?

(i) helium

(ii) oxygen

(iii) hydrogen

(iv) butane

2 / 10

Which of these elements has a relatively low boiling point (below 500 oC)?

3 / 10

Which of these true statements can help to explain why iodine is a solid while chlorine is a gas at room temperature and pressure?

(i) iodine molecules have a larger surface area than chlorine molecules

(ii) iodine atoms are heavier than chlorine atoms

(iii) the outer shell electrons in iodine atoms are further from the nucleus than they are in chlorine atoms

(iv) the charge on the nucleus of an iodine atom is larger than the charge on the nucleus of a chlorine atom

4 / 10

What is the bond angle found in SO42-?

5 / 10

What is the bond angle found in methane?

6 / 10

An element M has two electrons in its outer shell. An element X has seven electrons in its outer shell. What is the likely formula of the compound of X and Y?

7 / 10

8 / 10

9 / 10

How many complete sub-shells are there in the phosphorus atom?

10 / 10

What is the electronic configuration of bromine? Enter your answer in the following format 1s2 2s2 etc. (note the space between each sub-shell!) Follow the aufbau order of sub-shell filling.

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8

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

Which of these are examples of heterogeneous equilibria?

(i) CaCO3(s) <=> CaO(s) + CO2(g)

(ii) Fe2+(aq) + Ag+(aq) <=> Fe3+(aq) + Ag(s)

(iii) 3Fe(s) + 4H2O(g) <=> Fe3O2(s) + 4H2(g)

(iv)Br2(aq) + H2O(l) <=> HOBr(aq) + H+(aq) + Br-(aq)

2 / 10

Which of these reactions can be reversed by changing the conditions in a typical advanced chemistry laboratory?

(i) CuSO4.5H2O(s) -> CuSO4(s) + 5H2O(l)

(ii) 2Mg(s) + O2(g) -> 2MgO(s)

(iii) NH3(g) + HCl(g) -> NH4Cl(s)

(iv) CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l)

3 / 10

Using enthalpies of combustion ΔcH, calculate the enthalpy change for the cracking of butane:

C4H10(g) => C2H6(g) + C2H4(g)

Select the data from the 'Selection of Enthalpies of Formation and Combustion' shown above.

If this question was generated from Random Retrieval, this data can also be found in TOOLS>Data Sheets.

4 / 10

Using enthalpies of formation ΔfH, calculate the enthalpy change for the following hydration process.

Na2S2O3(s) + 5H2O(l) => Na2S2O3•5H2O(s)

Select the data from the 'Selection of Enthalpies of Formation and Combustion' shown above.

If this question was generated from Random Retrieval, this data can also be found in TOOLS>Data Sheets.

5 / 10

An example of an endothermic change is the:

6 / 10

When chlorine reacts with cold, aqueous sodium hydroxide the ions formed are:

7 / 10

The carbonates of group 2 metals (M):

(i) have the formula of the form MCO3

(ii) are insoluble in water

(iii) become more difficult to decompose on heating down the group

(iv) decompose on heating to the metal and carbon dioxide

8 / 10

What is the oxidation number of CARBON in methanol

CH3OH

9 / 10

In the periodic table a periodic pattern is:

10 / 10

An example of a p-block element is:

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20

Core Organic Chemistry Random Retrieval

This quiz contains all the questions in the Core Organic Chemistry section. The website will pick 10 questions at random.

1 / 10


Choose one of the following options:

2 / 10

How many structural isomers of C4H8O are there?

It's really difficult to get all of these structures, so don't panic if you miss some. Just spend some time sketching out all the possibilities and remembering some simple rules, e.g carbon forms 4 bonds, oxygen forms 2 etc. Be creative!

3 / 10

4 / 10

Infra-red absorption ranges for some bonds are as follows:

C-H, 2850 - 3300 cm-1

C=C, 1620 - 1680 cm-1

C=O, 1680 - 1750 cm-1

C-O, 1000 - 1300 cm-1

O-H (alcohols), 3230 - 3550 cm-1

O-H (acids), 2500 - 3000 cm-1

The IR spectrum of propanal has one particularly strong absorption peak

This can be expected to be at:

5 / 10

Which is the correct sequence of events that takes place in a modern mass spectrometer in the production of a mass spectrum from a sample of an element or compound?

6 / 10

An alcohol consists of 64.9% carbon, 13.5% hydrogen and 21.6% oxygen.

What is the molecular formula of the compound? (Relative atomic masses: C = 12, H = 1, O = 16)

7 / 10

What is the product of the reaction of but-2-ene with steam in the presence of a phosphoric acid catalyst?

8 / 10

Which of these formulae represents 2,2-dimethylpentane?

(i) CH3C(CH3)2CH2CH2CH3

(ii) CH3CH2C(CH3)2CH2CH3

(iii) CH3CH2CH2C(CH3)2CH3

(iv) CH3CH2CH2CH2CH(CH3)2

9 / 10

How many monosubstitution products can be formed when butane reacts with chlorine?

10 / 10

An alkane in petrol is:

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