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

CH2 - SEPARATING SUBSTANCES

Petroleum is a useful natural resource.The diagram shows how petroleum can be separated into useful substances.(a) What is the name of the separation ...

2020 Spring

Theory

CH11 - ACIDS AND BASES

Aluminium is extracted from its ore. The ore is converted into pure aluminium oxide, which then undergoes electrolysis as shown.(a) (i) Name an ore of...

2020 Spring

Theory

CH12 - THE PERIODIC TABLE

(a) Identify the element which is in Group VI and Period 4...............................................................................................

2020 Spring

Theory

CH13 - THE BEHAVIOR OF METALS

Iron is a typical transition element.Iron:● acts as a catalyst● forms coloured compounds● has more than one oxidation state.(a) Name one major i...

2020 Spring

Theory

CH18 - POLYMERS

There are two types of polymers.(a) Addition polymers are made from many identical small units. (i) What is the term used to describe these small unit...

2020 Spring

MCQ

CH1 - STATES OF MATTER

A mixture of ice and water is left to stand and the ice melts.Which row describes what happens as the ice is melting?[Table_1]temperature of mixture |...

2020 Summer

MCQ

CH1 - STATES OF MATTER

Which piece of apparatus should be used to measure exactly 21.4 cm$^3$ of water?

2020 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

The chromatogram for an unknown dye is shown.What is the $R_f$ value of the dye?

2020 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The atomic number and nucleon number of a potassium atom are shown.[Table_1]How many protons, neutrons and electrons are in a potassium ion, K⁺?

2020 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The electronic structures of two atoms, P and Q, are shown. P and Q combine together to form a compound.What is the type of bonding in the compound an...

2020 Summer