Theory

CH1 - STATES OF MATTER

The diagram shows how the molecules in the exhaust gases diffuse into the air.Which statement describes what happens to these molecules next?A. The mo...

2009 Summer

Theory

CH1 - STATES OF MATTER

Molten lead(II) bromide is electrolysed as shown. Which ions are discharged at each electrode?[Table_1]Positive electrode | Negative electrodeA: Pb+ |...

2009 Summer

Theory

CH1 - STATES OF MATTER

Which of these elements could be formed at the anode when a molten salt is electrolysed?A. copperB. iodineC. lithiumD. strontium

2009 Summer

Theory

CH1 - STATES OF MATTER

The diagram shows how the molecules in the exhaust gases diffuse into the air. Which statement describes what happens to these molecules next? A. T...

2009 Summer

Theory

CH1 - STATES OF MATTER

Which of these elements could be formed at the anode when a molten salt is electrolysed?A copperB iodineC lithiumD strontium

2009 Summer

Theory

CH1 - STATES OF MATTER

Molten lead(II) bromide is electrolysed as shown. [Image_1: Diagram of an electrolytic cell with molten lead(II) bromide] Which ions are discharged a...

2009 Summer

Theory

CH1 - STATES OF MATTER

The results of experiments on electrolysis using inert electrodes are given in the table.Complete the table; the first line has been completed as an e...

2009 Summer

Theory

CH1 - STATES OF MATTER

Some grass is crushed and mixed with the solvent, propanone. The colour pigments are extracted to give a deep green solution.(a) (i) Draw a labelled d...

2009 Summer

Theory

CH1 - STATES OF MATTER

The results of experiments on electrolysis using inert electrodes are given in the table. Complete the table; the first line has been completed as an ...

2009 Summer

Theory

CH1 - STATES OF MATTER

The following is a list of the electron distributions of atoms of unknown elements.[Table_1: element - electron distribution](a) Choose an element fro...

2009 Summer

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

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

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

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

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

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

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

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

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

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