MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

The diagram shows some properties that substances may have.To which labelled part of the diagram does $^{235}U$ belong?

2016 Summer

2

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

Which statement about fuels is correct?

2017 Summer

2

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

Which statements about exothermic and endothermic reactions are correct?1. During an exothermic reaction, heat is given out.2. The temperature of an e...

2017 Summer

1

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

The energy level diagram for the combustion of methane is shown. Which row gives the equation and energy change for this reaction?

2016 Summer

2

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

The equation for the reaction between hydrogen and chlorine is shown.$$H_2(g) + Cl_2(g) \rightarrow 2HCl(g)$$The reaction is exothermic.The bond energ...

2017 Summer

2

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

A gas is produced when calcium carbonate is heated. Which type of change is this?

2017 Summer

2

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

The reaction used to manufacture ammonia from nitrogen and hydrogen is reversible. An equilibrium can be established between ammonia, nitrogen and hyd...

2017 Summer

2

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

Methanol is made by reacting carbon monoxide with hydrogen. The reaction is exothermic and is a chemical equilibrium. The equation for the reaction is...

2016 Summer

1

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

The equation for the combustion of methane is shown.$$\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}$$The energy change for t...

2017 Winter

3

MCQ

CH9 - ENERGY CHANGES AND REVERSIBLE REACTIONS

Which statement describes an exothermic reaction?

2017 Winter

1

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

3

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

1

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

2

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

1

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

2

MCQ

CH4 - ATOMS COMBINING

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

2016 Summer

2

MCQ

CH4 - ATOMS COMBINING

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

2016 Summer

2

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

1

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

1

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

1