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

An alkane in petrol is:

2 / 10

What is the formula of 2-bromo-3-methylpentane?

3 / 10

What is the name of the mechanism of the reaction between 1-bromobutane and aqueous sodium hydroxide?

4 / 10


Choose one of the following options:

5 / 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

6 / 10

E represents an atom of an element in the equation: E(g) -> E+(g) + e– Which of these statements is/are true:

(i) the element must be a metal

(ii) the enthalpy change for this process is the first ionisation energy of the element

(iii) the element must be a gas at room temperature.

(iv) this process occurs in a mass spectrometer used to analyse the element

7 / 10

How many complete shells are there in the zinc atom?

8 / 10

How many moles of molecules are there in 0.240 g bromine?

9 / 10

Which of these materials consist of a giant structure of ions?

(i) magnesium oxide

(ii) silicon dioxide

(iii) potassium fluoride

(iv) silicon chloride

10 / 10

How many shared pairs of electrons are there in an ethene molecule, C2H4?

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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

What is the concentration of a solution of sodium hydroxide that is made by dissolving 20.0g of the solid in water and making the solution up to 250 cm3? (Relative atomic masses: Na = 23, O = 16, H = 1)

2 / 10

Which of these molecules are overall non-polar?

(i) H2O

(ii) CO2

(iii) SO2

(iv) CCl4

3 / 10

What is the bond angle found in SF6?

4 / 10

What is the bond angle found in ammonia?

5 / 10

How many shared pairs of electrons are there in an ethene molecule, C2H4?

6 / 10

Which of these sets of properties is that of a substance which is molecular?

7 / 10

How many sulfate ions are there in 0.01 mol aluminium sulfate?

(The Avogadro constant = 6.02 x 1023 mol-1)

8 / 10

How many partially filled orbitals are there in the nitrogen atom?

9 / 10

What is the electronic configuration of scandium? 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.

10 / 10

What is the electronic configuration of copper? 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

The reaction of nitrogen with hydrogen to form ammonia is exothermic. Which of these changes increases the proportion of ammonia in an equilibrium mixture of nitrogen, hydrogen and ammonia.

(i) raising the pressure at constant temperature

(ii) raising the temperature at constant pressure

(iii) decreasing the volume at constant temperature

(iv) adding a catalyst

2 / 10

The enthalpy of combustion ΔcH of butan-1-ol = -2670 kJ mol-1

Using this figure and data from the 'Selection of Enthalpies of Formation and Combustion' shown above, calculate the enthalpy of formation ΔfH of liquid butan-1-ol

A Hess Cycle should be drawn to help you calculate this.

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

3 / 10

An example of an endothermic change is the:

4 / 10

What is the oxidation number of OXYGEN in hydrogen peroxide

H2O2

5 / 10

What is the oxidation number of CARBON in methanol

CH3OH

6 / 10

What is the oxidation number of NITROGEN in

NH4+

7 / 10

What is the oxidation number of SULFUR in

SO42-

8 / 10

Which of these true statements help to explain why the values of the first ionisation enthalpies (energies) of the group 1 metals fall down the group from lithium to caesium?

(i) Down the group, the outer electron gets further from the nucleus

(ii) The charge on the nucleus increases down the group

(iii) Greater shielding means that the attraction between the nucleus and the outer electron reduces down the group

(iv) In all the atoms the outer electron is an s-electron

9 / 10

An element which consists of a giant structure of atoms held together by covalent bonding 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

2 / 10

A compound X with the molecular formula C4H10O has a broad peak in its IR spectrum at 3500cm-1.

Oxidation of X with excess potassium dichromate(VI) gives a product Y which is not an acid and does not reduce Fehling's solution.

Y has a strong peak in its IR spectrum at 1700cm-1.

Identify X and Y. (See also the data in question 9.)

3 / 10

The mass spectrum of copper has two significant peaks. The peak at 63 has a relative abundance of 69 and the peak at 65 has a relative abundance of 31.

This shows that the relative atomic mass of copper is:

4 / 10

The mass spectrum of chlorine includes three peaks at mass-to-charge ratios of 70, 72 and 74.

The order of the heights of these peaks is:

5 / 10

What are the conditions for converting 1,2-dichlorethane into ethane-1,2-diol?

6 / 10

Which of these alcohols are isomers of butan-1-ol?

(i) CH3CH2CHOHCH3

(ii) (CH3)3COH

(iii) CH3CH(CH3)CH2OH

(iv) (CH3)3CCH2OH

7 / 10

What type of reaction takes place on passing the vapour of ethanol over hot aluminium oxide? (Water and an alkene are produced)

8 / 10

At a high temperature in the presence of steam, the alkane C16H24 reacts to form a mixture of ethene, propene and ethane. This is an example of:

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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