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

1

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

2

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

1

MCQ

CH2 - SEPARATING SUBSTANCES

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

2017 Winter

1

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

2

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

1

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

CH1 - STATES OF MATTER

Small crystals of purple $\text{KMnO}_4$ $(M_r = 158)$ and orange $\text{K}_2\text{Cr}_2\text{O}_7$ $(M_r = 294)$ were placed at the centres of separa...

2017 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

Pure water has a boiling point of 100 °C and a freezing point of 0 °C. What is the boiling point and freezing point of a sample of aqueous sodium c...

2017 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

A chromatogram obtained from the chromatography of four substances is shown. Which substance has an $R_f$ value of 0.6?

2017 Summer

2

MCQ

CH3 - ATOMS AND ELEMENTS

Sodium reacts with chlorine to form sodium chloride.Which statements describe what happens to the sodium atoms in this reaction?1. Sodium atoms form p...

2017 Summer

1

MCQ

CH3 - ATOMS AND ELEMENTS

Diamond is extremely hard and does not conduct electricity.Which statement explains these properties?

2017 Summer

2

MCQ

CH4 - ATOMS COMBINING

Which statement about metals is not correct?

2017 Summer

1

MCQ

CH4 - ATOMS COMBINING

Aluminium reacts with fluorine.$xAl(s) + yF_2(g) \rightarrow zAlF_3(s)$Which values of $x$, $y$ and $z$ balance the equation?[Table_1]

2017 Summer

2

MCQ

CH4 - ATOMS COMBINING

Carbon monoxide burns in oxygen to produce carbon dioxide. $$2\text{CO}(g) + \text{O}_2(g) \rightarrow 2\text{CO}_2(g)$$ Which mass of carbon dioxide...

2017 Summer

1

MCQ

CH1 - STATES OF MATTER

Which statement about electrolysis is correct?

2017 Summer

1

MCQ

CH1 - STATES OF MATTER

The reactivity series for a number of different metals is shown.[Image_1: Reactivity series and diagram]The diagram shows different metal strips dippe...

2017 Summer

2