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

3

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

Theory

CH1 - STATES OF MATTER

The diagrams show the arrangement of particles in three different physical states of substance X.Which statement about the physical states of substanc...

2011 Summer

3

Theory

CH2 - SEPARATING SUBSTANCES

An aqueous solution is coloured. Which method of separation would show that the solution contains ions of different colours? A chromatography B crysta...

2011 Summer

1

Theory

CH2 - SEPARATING SUBSTANCES

The table gives the solubility of four substances in ethanol and in water.A mixture containing all four substances is added to ethanol, stirred and fi...

2011 Summer

1

Theory

CH4 - ATOMS COMBINING

Which two elements react together to form an ionic compound? [Table_1] A. W and X B. X and Y C. Y and Z D. Z and W

2011 Summer

1

Theory

CH3 - ATOMS AND ELEMENTS

The diagram shows part of the Periodic Table.Which element is correctly matched with its electronic structure?[Table_1: electronic structure]A: 2,8,1B...

2011 Summer

1

Theory

CH4 - ATOMS COMBINING

In the diagrams, circles of different sizes represent atoms of different elements.Which diagram represents hydrogen chloride gas?Options: A, B, C, D

2011 Summer

2

Theory

CH4 - ATOMS COMBINING

The nucleon number and proton number of the lithium atom are shown by the symbol $^7_3\text{Li}$.What is the correct symbol for the lithium ion in lit...

2011 Summer

1

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

What is the relative molecular mass ($M_r$) of HNO$_3$? A 5 B 31 C 32 D 63

2011 Summer

2

Theory

CH14 - MAKING USE OF METALS

Electricity from a power station passes through overhead cables to a substation and then to a school where it is used to electrolyse concentrated hydr...

2011 Summer

2

Theory

CH1 - STATES OF MATTER

Which statement about the electrolysis of molten lead(II) bromide is correct? A A colourless gas is seen at the cathode. B A grey metal is seen at...

2011 Summer

2