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

Which of these alkenes shows E/Z isomerism?

2 / 10

Which of these organic compounds show a broad absorption peak caused by hydrogen bonding affecting a functional group.

(i) propanol

(ii) propanal

(iii) propanoic acid

(iv) propanone

3 / 10


Choose one of the following options:

4 / 10

What is the oxidation number of CARBON in

CCl4

5 / 10

What is the oxidation number of SULFUR in

S2O32-

6 / 10

Chlorine disproportionates when it reacts with:

7 / 10

What is the electronic configuration of sodium? 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

8 / 10

Which of these molecules are overall polar?

(i) CH3Cl

(ii) CH2Cl2

(iii) CHCl3

(iv) CCl4

9 / 10

The pressure of a gas results from:

10 / 10

What is the volume of 0.020 mol oxygen at 27oC and 100 kPa pressure given that the value of the gas constant R = 8.31 J mol-1K-1?

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18

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

In the half equation: MnO4- (aq) + 8H+(aq) + ne- -> Mn2+(aq) + 4H2O(l) the value of n is:

2 / 10

Dilute hydrochloric acid reacts with:

(i) zinc to form zinc chloride and hydrogen

(ii) copper(II) oxide to form copper(II) chloride and water

(iii) zinc carbonate to form zinc chloride, carbon dioxide and water

(iv) copper to form copper(II) chloride and hydrogen

3 / 10

The pressure of a gas results from:

4 / 10

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

5 / 10

6 / 10

Sodium hydride reacts with water:

NaH(s) + H2O(l) -> NaOH(aq) + H2(g)

What is the concentration of a solution of sodium hydroxide formed when 0.600 g sodium hydride reacts with water and the solution is diluted to 100 cm3?

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 moles of molecules are there in 0.240 g bromine?

9 / 10

What is the electronic configuration of carbon?

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

How many neutrons are there in an atom of boron with mass number 9 and atomic number 4?

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4

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

This is the equilibrium in a solution of bromine in water:

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

The orange colour of bromine disappears on adding

(i) sodium bromide

(ii) water

(iii) dilute hydrochloric acid

(iv) sodium hydroxide solution

2 / 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?

3 / 10

Calculate the value of the standard enthalpy change of formation of methane given that the values for standard enthalpy changes of combustion are -890 kJ mol-1 for methane, -393 kJ mol-1 for carbon and -286 kJ mol-1 for hydrogen gas.

4 / 10

The total heat capacity of a calorimeter is 2000 J K-1.

The standard enthalpy of combustion of propane is -2200 kJ mol-1

Calculate the expected temperature rise on heating the calorimeter by burning 0.0500 mol of fuel from a propane burner assuming that all the energy heats the calorimeter.

Take care with units.

5 / 10

Which of the following properties increase from left to right across the series: AgCl - AgBr - AgI?

(i) intensity of colour

(ii) solubility in ammonia solution

(iii) ease of oxidation to the halogens

(iv) solubility in aqueous ammonia

6 / 10

All the oxides of the metals Mg, Ca, Sr and Ba:

(i) are basic

(ii) consist of giant structures of ions

(iii) form nitrates when they react with dilute nitric acid

(iv) are freely soluble in water

 

7 / 10

The reaction of calcium with water produces:

8 / 10

What is the oxidation number of SULFUR in

SO3

9 / 10

What is the oxidation number of CARBON in

CO2

10 / 10

In the periodic table a periodic pattern is:

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16

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

Which of the following statements describe molecules that are stereo isomers?

(i) molecules whose atoms have a different arrangement in space

(ii) molecules that have the same molecular formula

(iii) molecules in which the atoms are joined to the same neighouring atoms

(iv) molecules which the same atoms but the atoms are bonded in a different order

 

3 / 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:

4 / 10

Species such as CH3+ and Br+ can be detected in a mass spectrum but do not occur in chemical reactions under typical laboratory conditions.

This is because in a mass spectrometer:

5 / 10

Products formed by heating 2-bromo-3-methylbutane with a solution of potassium hydroxide in ethanol (an elimination reaction) include:

(i) 2-methylbut-1-ene

(ii) 3-methylbut-2-ene

(iii) 2-methylbut-3-ene

(iv) 3-methylbut-1-ene

6 / 10

In a two step synthesis of butanoic acid what is the formula of compound X?

CH3CH2CH2Br -> X -> CH3CH2CH2CO2H

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 alkenes will produce the largest %yield of 2-bromopentane when it is reacted with hydrogen bromide?

9 / 10

Passing the vapour of a liquid mixture of alkanes over strongly heated porcelain chips produces a product which:

(i) is a gas

(ii) is highly flammable

(iii) decolourises a solution of bromine

(iv) is soluble in water.

10 / 10

One mole of an alkane needs 8 moles of oxygen for complete combustion. What is the molecular formula of the alkane?

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