MCQ

CH7 - REDOX REACTIONS

The reactions shown may occur in the air during a thunderstorm.$\text{N}_2 + \text{O}_2 \rightarrow 2\text{NO}$$2\text{NO} + \text{O}_2 \rightarrow 2\...

2009 Summer

MCQ

CH7 - REDOX REACTIONS

The reactions shown may occur in the air during a thunder storm.N\textsubscript{2} + O\textsubscript{2} \rightarrow 2NO2NO + O\textsubscript{2} \right...

2009 Summer

MCQ

CH7 - REDOX REACTIONS

The equations represent redox reactions. In which equation is the underlined substance acting as a reducing agent?

2009 Winter

MCQ

CH7 - REDOX REACTIONS

The equations represent redox reactions.In which equation is the underlined substance acting as a reducing agent?

2009 Winter

Theory

CH7 - REDOX REACTIONS

A student half-filled a syringe with water.She then carefully drew up some blue ink into the syringe so that it formed a separate layer below the wate...

2010 Summer

MCQ

CH7 - REDOX REACTIONS

The red colour in some pottery glazes may be formed as a result of the reactions shown.$$ ext{heat}\begin{align} \text{CuCO}_3 & \rightarrow \text{CuO...

2010 Winter

MCQ

CH7 - REDOX REACTIONS

The red colour in some pottery glazes may be formed as a result of the reactions shown.$\text{heat}$CuCO$_3$ $\rightarrow$ CuO + CO$_2$CuO + SnO $\rig...

2010 Winter

MCQ

CH7 - REDOX REACTIONS

The red colour in some pottery glazes may be formed as a result of the reactions shown.$$\text{heat}$$$$\text{CuCO}_3 \rightarrow \text{CuO} + \text{C...

2010 Winter

MCQ

CH7 - REDOX REACTIONS

The element vanadium, V, forms several oxides. In which change is oxidation taking place?

2012 Summer

MCQ

CH7 - REDOX REACTIONS

In which reaction is lead(II) oxide, PbO, oxidised?

2012 Summer

MCQ

CH1 - STATES OF MATTER

The diagram shows a cup of tea.Which row describes the water particles in the air above the cup compared with the water particles in the cup?[Table_1]

2010 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

A fruit drink coloured orange contains a dissolved mixture of red and yellow colouring agents. One of these colouring agents is suspected of being ill...

2010 Summer

MCQ

CH1 - STATES OF MATTER

A student carries out an experiment to find how fast 3 cm pieces of magnesium ribbon dissolve in 10 cm$^3$ samples of sulfuric acid at different tempe...

2010 Summer

MCQ

CH4 - ATOMS COMBINING

Which row shows the change that takes place when element X gains the new particle shown?[Table showing 'particle gained' and 'change']

2010 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The diagram shows an atom. What is the proton number and neutron number of the atom?

2010 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The symbols of two atoms may be written as shown. \( ^{52}_{23}X \) \( ^{52}_{24}Y \) Which statement about these atoms is correct?

2010 Summer

MCQ

CH14 - MAKING USE OF METALS

Which name is given to mixtures of metals?

2010 Summer

MCQ

CH4 - ATOMS COMBINING

Element X has six electrons in its outer shell.How could the element react?

2010 Summer

MCQ

CH4 - ATOMS COMBINING

In which compounds are pairs of electrons shared between atoms?1. sodium chloride2. methane3. lead bromide

2010 Summer

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Hydrogen and chlorine react as shown.1 molecule of hydrogen + 1 molecule of chlorine \rightarrow 2 moles of hydrogen chloride.What is the equation for...

2010 Summer