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

Theory

CH1 - STATES OF MATTER

The diagram shows how the molecules in the exhaust gases diffuse into the air.Which statement describes what happens to these molecules next?A. The mo...

2009 Summer

2

Theory

CH2 - SEPARATING SUBSTANCES

A student takes 2 g samples of calcium carbonate and adds them to 20 cm$^3$ samples of dilute hydrochloric acid at different temperatures. She measure...

2009 Summer

2

Theory

CH2 - SEPARATING SUBSTANCES

The diagram shows the paper chromatograms of four substances, W, X, Y and Z. Which two substances are pure?A W and X B W and Y C X and Y D X and Z

2009 Summer

1

Theory

CH3 - ATOMS AND ELEMENTS

An element S has the proton number 18. The next element in the Periodic Table is an element T. Which statement is correct?A Element T has one more ele...

2009 Summer

2

Theory

CH3 - ATOMS AND ELEMENTS

Which numbers are added together to give the nucleon number of an ion?A number of electrons + number of neutronsB number of electrons + number of prot...

2009 Summer

1

Theory

CH3 - ATOMS AND ELEMENTS

The electronic configuration of an ion is 2.8.8.What could this ion be?[Table_1]

2009 Summer

1

Theory

CH4 - ATOMS COMBINING

The diagrams show the structures of two forms, P and Q, of a solid element. What are suitable uses of P and Q, based on their structures?[Table_1]

2009 Summer

2

Theory

CH4 - ATOMS COMBINING

Element V forms an acidic, covalent oxide. Which row in the table shows how many electrons there could be in the outer shell of an atom of V? [Table...

2009 Summer

2

Theory

CH4 - ATOMS COMBINING

When sodium chloride is formed from its elements, each chlorine atom ......1...... one ......2....... Which words correctly complete gaps 1 and 2? [...

2009 Summer

2

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Nitrogen and hydrogen react together to form ammonia.$N_2 + 3H_2 \rightarrow 2NH_3$When completely converted, 7 tonnes of nitrogen gives 8.5 tonnes of...

2009 Summer

3