Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

Which element is not added to a fertiliser?A. aluminiumB. nitrogenC. phosphorusD. potassium

2009 Summer

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

Which element is not added to a fertiliser? A aluminium B nitrogen C phosphorus D potassium

2009 Summer

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

Ammonia is manufactured by the Haber process. $$\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g)$$ the forward reaction is exothermi...

2009 Summer

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

Fertilisers are used to provide three of the elements needed for plant growth. Which two compounds would give a fertiliser containing all three of the...

2009 Winter

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

Fertilisers are used to provide three of the elements needed for plant growth. Which two compounds would give a fertiliser containing all three of the...

2009 Winter

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

(a) Sulfuric acid is made by the Contact process.$$2SO_2 + O_2 \rightleftharpoons 2SO_3$$This is carried out in the presence of a catalyst at 450°C a...

2009 Winter

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

(a) Sulfuric acid is made by the Contact process.$$2SO_2 + O_2 \rightleftharpoons 2SO_3$$This is carried out in the presence of a catalyst at 450°C a...

2009 Winter

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

To grow roses, a fertiliser containing nitrogen, phosphorus and potassium is needed.For the best flowers, the fertiliser should contain a high proport...

2010 Summer

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

To grow roses, a fertiliser containing nitrogen, phosphorus and potassium is needed. For the best flowers, the fertiliser should contain a high propor...

2010 Summer

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

To grow roses, a fertiliser containing nitrogen, phosphorus and potassium is needed.For the best flowers, the fertiliser should contain a high proport...

2010 Summer

Theory

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

Theory

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

Theory

CH1 - STATES OF MATTER

A student carries out an experiment to find how fast 3 cm pieces of magnesium ribbon dissolve in 10 cm³ samples of sulfuric acid at different tempera...

2010 Summer

Theory

CH4 - ATOMS COMBINING

Which row shows the change that takes place when element X gains the new particle shown?[Table_1]Table 1| | particle gained | change || --- ...

2010 Summer

Theory

CH3 - ATOMS AND ELEMENTS

The diagram shows an atom.key𝑒 electronnucleus containing nine particlesWhat is the proton number and neutron number of the atom?[Table_1]| | ...

2010 Summer

Theory

CH3 - ATOMS AND ELEMENTS

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

2010 Summer

Theory

CH14 - MAKING USE OF METALS

Which name is given to mixtures of metals?A. alloysB. compoundsC. oresD. salts

2010 Summer

Theory

CH4 - ATOMS COMBINING

Element X has six electrons in its outer shell.How could the element react?A by gaining two electrons to form a positive ionB by losing six electrons ...

2010 Summer

Theory

CH4 - ATOMS COMBINING

In which compounds are pairs of electrons shared between atoms?1. sodium chloride2. methane3. lead bromideA 1 only B 2 only C 1 and 3 D 1, 2 and 3

2010 Summer

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Hydrogen and chlorine react as shown.What is the equation for this reaction?A. $2H + 2Cl \rightarrow 2HCl$B. $2H + 2Cl \rightarrow H_2Cl_2$C. $H_2 + C...

2010 Summer