MCQ

CH2 - SEPARATING SUBSTANCES

Impurities change the melting and boiling points of substances.Sodium chloride is added to a sample of pure water.How does the addition of sodium chlo...

2017 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

In the chromatography experiment shown, which label represents the solvent front?

2016 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

The diagram shows a chromatogram of four substances. Which substance has an $R_f$ value of approximately 0.32?

2017 Summer

1

MCQ

CH2 - SEPARATING SUBSTANCES

X is a mixture of colourless compounds. The diagram shows a chromatogram of X and of three pure compounds, P, Q, and R. Which statement is not correct...

2016 Summer

3

MCQ

CH2 - SEPARATING SUBSTANCES

The flow chart shows stages in the treatment of river water to produce drinking water. What occurs at stages X and Y?

2017 Winter

2

MCQ

CH2 - SEPARATING SUBSTANCES

During an experiment a measurement is recorded in cm$^3$.Which apparatus is used?

2017 Winter

2

MCQ

CH2 - SEPARATING SUBSTANCES

A student mixes 25 cm$^3$ samples of dilute hydrochloric acid with different volumes of aqueous sodium hydroxide. In each case, the student measures t...

2016 Winter

2

MCQ

CH2 - SEPARATING SUBSTANCES

A student carried out paper chromatography on a mixture of amino acids. The student sprayed the dried chromatogram with a locating agent. What is the ...

2017 Winter

3

MCQ

CH2 - SEPARATING SUBSTANCES

A sample contains a mixture of powdered limestone (calcium carbonate), sugar and wax.What is the correct way to obtain a pure sample of sugar?

2016 Winter

2

MCQ

CH2 - SEPARATING SUBSTANCES

Silver nitrate reacts with sodium chloride to produce silver chloride and sodium nitrate. The equation for the reaction is shown.$\text{AgNO}_3(\text{...

2017 Summer

1

MCQ

CH11 - ACIDS AND BASES

A student investigated the diffusion of ammonia gas, NH$_3$, and hydrogen chloride gas, HCl.Two sets of apparatus were set up as shown at room tempera...

2018 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

Chromatography is a technique used to separate coloured dyes.Which dye has an $R_f$ value of 0.7?

2018 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

Which piece of apparatus is used to measure exactly 26.3 cm³ of a liquid?

2018 Summer

1

MCQ

CH4 - ATOMS COMBINING

The ‘lead’ in a pencil is made of a mixture of graphite and clay. When the percentage of graphite is increased, the pencil slides across the paper...

2018 Summer

2

MCQ

CH3 - ATOMS AND ELEMENTS

Chlorine exists as two common isotopes, $^{35}Cl$ and $^{37}Cl$.Information about these two isotopes is shown.[Table_1]Which statement explains why th...

2018 Summer

3

MCQ

CH4 - ATOMS COMBINING

Which substance is not a macromolecule?

2018 Summer

2

MCQ

CH12 - THE PERIODIC TABLE

Copper is a metallic element. Which statements about copper are correct? 1. Copper is malleable because layers of ions are in fixed positions and ca...

2018 Summer

2

MCQ

CH6 - USING MOLES

The equation for the combustion of ethane is shown.$2C_2H_6 + 7O_2 \rightarrow 4CO_2 + 6H_2O$Which volume of carbon dioxide, at room temperature and p...

2018 Summer

2

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

A solution of ethanoic acid, CH$_3$COOH, has a concentration of 2 mol/dm$^3$.Which statement about this solution is correct?

2018 Summer

2

MCQ

CH7 - REDOX REACTIONS

Aqueous copper(II) sulfate is electrolysed using copper electrodes. Which statement is correct?

2018 Summer

2