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

MCQ

CH1 - STATES OF MATTER

The rate of diffusion of two gases, methane, CH₄, and ethene, C₂H₄, is measured using the apparatus shown.Which gas diffuses faster and why?

2016 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

A sample of a dye is investigated by chromatography. A line is drawn across a piece of chromatography paper and a spot of the dye is placed on it.The ...

2016 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

The paper chromatogram below was obtained from four different dyes.Which dye has an $R_f$ value of 0.7?

2016 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

Which statements about isotopes of the same element are correct?1. They are atoms which have the same chemical properties because they have the same n...

2016 Summer

MCQ

CH4 - ATOMS COMBINING

The table shows the electronic structure of four atoms.[Table_1]atom | electronic structure---- | ------------------- W | 2,8,1 X | 2,8,4 Y | 2,...

2016 Summer

MCQ

CH4 - ATOMS COMBINING

Which statement describes the attractive forces between molecules (intermolecular forces)?

2016 Summer

MCQ

CH4 - ATOMS COMBINING

The diagram represents the general structure of a solid Z. What is Z?

2016 Summer

MCQ

CH6 - USING MOLES

A compound, X, contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass.The relative molecular mass, $M_r$, of X is 60.What is the molecular form...

2016 Summer

MCQ

CH11 - ACIDS AND BASES

25 cm$^3$ of 0.1 mol/dm$^3$ hydrochloric acid exactly neutralise 20 cm$^3$ of aqueous sodium hydroxide.The equation for this reaction is:NaOH + HCl $\...

2016 Summer

MCQ

CH1 - STATES OF MATTER

Which reactions could take place at the anode during electrolysis? 1. $4\text{OH}^-(aq) \rightarrow 2\text{H}_2\text{O}(l) + \text{O}_2(g) + 4e^-$ 2...

2016 Summer