Theory

CH14 - MAKING USE OF METALS

Aluminium is extracted from its oxide by electrolysis. The oxide is dissolved in ……1…… cryolite and aluminium is deposited at the ……2…�...

2009 Summer

Theory

CH14 - MAKING USE OF METALS

Which diagram represents the structure of an alloy?

2009 Summer

Theory

CH14 - MAKING USE OF METALS

In a blast furnace, iron(III) oxide is converted to iron and carbon monoxide is converted to carbon dioxide.$$\text{Fe}_2\text{O}_3 + 3\text{CO} \righ...

2009 Summer

Theory

CH14 - MAKING USE OF METALS

Stainless steel is an alloy of iron and other metals. It is strong and does not rust but it costs much more than normal steel.What is not made from st...

2009 Summer

Theory

CH14 - MAKING USE OF METALS

Aluminium is extracted from its oxide by electrolysis.The oxide is dissolved in ......1...... cryolite and aluminium is deposited at the ......2.........

2009 Summer

Theory

CH14 - MAKING USE OF METALS

Which diagram represents the structure of an alloy?[Image of diagrams A, B, C, D]

2009 Summer

Theory

CH14 - MAKING USE OF METALS

In a blast furnace, iron(III) oxide is converted to iron and carbon monoxide is converted to carbon dioxide.$$\text{Fe}_2\text{O}_3 + 3\text{CO} \righ...

2009 Summer

Theory

CH14 - MAKING USE OF METALS

Stainless steel is an alloy of iron and other metals. It is strong and does not rust but it costs much more than normal steel.What is not made from st...

2009 Summer

Theory

CH14 - MAKING USE OF METALS

The diagram shows how aluminium is manufactured by electrolysis. What are the anode and cathode made of?[Table_1]

2009 Winter

Theory

CH14 - MAKING USE OF METALS

Which statement about alloys is not correct?A. Alloys are more expensive than the metals they are made from.B. Alloys are mixtures of different metals...

2009 Winter

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

CH2 - SEPARATING SUBSTANCES

A student takes 2 g samples of calcium carbonate and adds them to 20 cm$^3$ samples of dilute hydrochloric acid at different temperatures. She measure...

2009 Summer

Theory

CH2 - SEPARATING SUBSTANCES

The diagram shows the paper chromatograms of four substances, W, X, Y and Z. Which two substances are pure?A W and X B W and Y C X and Y D X and Z

2009 Summer

Theory

CH3 - ATOMS AND ELEMENTS

An element S has the proton number 18. The next element in the Periodic Table is an element T. Which statement is correct?A Element T has one more ele...

2009 Summer

Theory

CH3 - ATOMS AND ELEMENTS

Which numbers are added together to give the nucleon number of an ion?A number of electrons + number of neutronsB number of electrons + number of prot...

2009 Summer

Theory

CH3 - ATOMS AND ELEMENTS

The electronic configuration of an ion is 2.8.8.What could this ion be?[Table_1]

2009 Summer

Theory

CH4 - ATOMS COMBINING

The diagrams show the structures of two forms, P and Q, of a solid element. What are suitable uses of P and Q, based on their structures?[Table_1]

2009 Summer

Theory

CH4 - ATOMS COMBINING

Element V forms an acidic, covalent oxide. Which row in the table shows how many electrons there could be in the outer shell of an atom of V? [Table...

2009 Summer

Theory

CH4 - ATOMS COMBINING

When sodium chloride is formed from its elements, each chlorine atom ......1...... one ......2....... Which words correctly complete gaps 1 and 2? [...

2009 Summer

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Nitrogen and hydrogen react together to form ammonia.$N_2 + 3H_2 \rightarrow 2NH_3$When completely converted, 7 tonnes of nitrogen gives 8.5 tonnes of...

2009 Summer