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

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.

2 / 10

Which reagent can be used to convert butan-1-ol to but-1-ene?

3 / 10


Choose one of the following options:

4 / 10

What is the oxidation number of NITROGEN in

NaNH2

5 / 10

What is the oxidation number of CARBON in methanol

CH3OH

6 / 10

What is the oxidation number of CARBON in methanal

CH2O

7 / 10

The reaction of calcium with water produces:

8 / 10

Which of these ions has the greatest polarising power?

9 / 10

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

10 / 10

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

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19

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 volume of 0.10 mol dm-3 hydrochloric acid is needed to neutralise 20.0 cm3 of 0.05 mol dm-3 barium hydroxide?

2 / 10

What is the concentration of hydroxide ions in a 0.050 mol dm-3 solution of barium hydroxide?

3 / 10

What is the temperature of a 12dm3 sample of gas that contains 7g of nitrogen if it is held at a pressure of 300kPa pressure given that the value of the gas constant R = 8.314 J mol-1K-1?:

4 / 10

Which of these compounds has a relatively low melting point (below 500 oC)?

 

5 / 10

Which one of the following is the electron configuration of a group 2 metal atom?

6 / 10

What is the bond angle found in methane?

7 / 10

Calculate the volume of oxygen gas formed on strongly heating 3.40 g sodium nitrate which decomposes according to this equation:

2NaNO3(s) -> 2NaNO2(s) + O2(g)

Assume that the volume of 1 mol of any gas is 24 000 cm3 under the conditions of the experiment.

8 / 10

How many complete shells are there in the zinc atom?

9 / 10

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

10 / 10

How many p electrons are there in the outer shell of a halogen atom?

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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

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

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)

3 / 10

What are the standard conditions for measuring standard enthalpy changes?

4 / 10

What is the oxidation number of OXYGEN in hydrogen peroxide

H2O2

5 / 10

What is the oxidation number of SULFUR in

S2O32-

6 / 10

What is the oxidation number of MANGANESE in

MnO4-

7 / 10

What is the oxidation number of NITROGEN in

NH3

8 / 10

What is the oxidation number of CARBON in

CO2

9 / 10

Which of these statements about atomic and ionic radii are true?

(i) Atomic radii increase down group 2

(ii) Ionic radii increase down group 7

(iii) Atomic radii decrease across period 3

(iv) In period 3 the ionic radii are smaller than the atomic radii

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


Choose one of the following options:

3 / 10

4 / 10

5 / 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:

6 / 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:

7 / 10

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

(i) CH3CH2CHOHCH3

(ii) (CH3)3COH

(iii) CH3CH(CH3)CH2OH

(iv) (CH3)3CCH2OH

8 / 10

Which of these alcohols is a tertiary alcohol?

(i) CH3CH2CHOHCH3

(ii) CH3CH(CH3)CHOHCH3

(iii) CH3C(CH3)2CH2CHOHCH3

(iv) (CH3)3COH

9 / 10

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

10 / 10

What is the name for this structure:

CH3CH(CH3)CH(CH3)CH2CH3?

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