Theory

CH10 - THE SPEED OF A REACTION

Which does not increase the speed of a reaction? A adding a catalyst B increasing the concentration of one of the reactants C increasing the particle ...

2009 Summer

Theory

CH10 - THE SPEED OF A REACTION

Which does not increase the speed of a reaction?A. adding a catalystB. increasing the concentration of one of the reactantsC. increasing the particle ...

2009 Summer

Theory

CH10 - THE SPEED OF A REACTION

Which change does not increase the speed of reaction between zinc and hydrochloric acid?A. adding a catalystB. decreasing the temperatureC. decreasing...

2009 Winter

Theory

CH10 - THE SPEED OF A REACTION

Which change does not increase the speed of reaction between zinc and hydrochloric acid?A. adding a catalystB. decreasing the temperatureC. decreasing...

2009 Winter

Theory

CH10 - THE SPEED OF A REACTION

A student investigates the rate of reaction between marble chips and hydrochloric acid.The loss in mass of the reaction flask is measured.The graph sh...

2010 Summer

Theory

CH10 - THE SPEED OF A REACTION

A student investigates the rate of reaction between marble chips and hydrochloric acid. The loss in mass of the reaction flask is measured. The graph ...

2010 Summer

Theory

CH10 - THE SPEED OF A REACTION

A student investigates the rate of reaction between marble chips and hydrochloric acid.The loss in mass of the reaction flask is measured.The graph sh...

2010 Summer

Theory

CH10 - THE SPEED OF A REACTION

A diagram of the apparatus which could be used to investigate the rate of reaction between magnesium and an excess of an acid is drawn below.(a) The m...

2010 Summer

Theory

CH10 - THE SPEED OF A REACTION

The hydrolysis of complex carbohydrates to simple sugars is catalysed by enzymes called carbohydrases and also by dilute acids.(a) (i) They are both c...

2010 Summer

Theory

CH10 - THE SPEED OF A REACTION

Thallium is a metal in Group III. It has oxidation states of +1 and +3.(a) Give the formula for the following thallium compounds. (i) thallium(I) sulf...

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