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

CH3 - ATOMS AND ELEMENTS

The table shows the numbers of protons, neutrons and electrons in particles A to I.[Table_1]Answer the following questions about particles A to I. Eac...

2021 Spring

Theory

CH15 - AIR AND WATER

The elements shown are gases at room temperature and pressure.hydrogennitrogenoxygenchlorine(a) State which one of these gases is green..................

2021 Spring

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

This question is about ammonia.(a) Nitrogen reacts with hydrogen to form ammonia in an industrial process.$$N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(...

2021 Spring

Theory

Concentration and Titration

A student wanted to make some zinc chloride crystals. The student followed the procedure shown. step 1 Add excess zinc powder to dilute hydrochlor...

2021 Spring

Theory

Plastics

The table shows the names or structures of organic compounds P to U. (a) Give the letters of the organic compounds, P to U, that are unsaturated hy...

2021 Spring

Theory

CH18 - POLYMERS

Polymers are large molecules built up from small molecules.(a) State the name given to the small molecules from which polymers are made..................

2021 Spring

MCQ

CH1 - STATES OF MATTER

A gas is released at point P in the apparatus shown. Which gas turns the damp universal indicator paper red most quickly?

2021 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

A mixture is separated using the apparatus shown. What is the mixture?

2021 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

Which statement about paper chromatography is correct?

2021 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

Element X has 7 protons. Element Y has 8 more protons than X. Which statement about element Y is correct?

2021 Summer