Theory

CH11 - ACIDS AND BASES

Aqueous sodium hydroxide is added to a solution of a salt. A blue precipitate is formed which does not dissolve in excess.Aluminium foil is added to t...

2009 Summer

Theory

CH11 - ACIDS AND BASES

The graph shows how the pH of soil in a field changed over time.At which point was the soil neutral?

2009 Summer

Theory

CH11 - ACIDS AND BASES

An element E is burned in air. A white solid oxide is formed.The oxide is tested with damp red litmus paper. The paper turns blue.What is element E?A ...

2009 Summer

Theory

CH11 - ACIDS AND BASES

Some reactions of a substance, R, are shown in the diagram. What type of substance is R? A. an acid B. a base C. an element D. a salt

2009 Summer

Theory

CH11 - ACIDS AND BASES

Substance K reacts with sodium carbonate to form a gas.The gas turns limewater cloudy.What is substance K and which process takes place in the reactio...

2009 Summer

Theory

CH11 - ACIDS AND BASES

Some reactions of a substance, R, are shown in the diagram. What type of substance is R? A an acid B a base C an element D a salt

2009 Summer

Theory

CH11 - ACIDS AND BASES

An element E is burned in air. A white solid oxide is formed. The oxide is tested with damp red litmus paper. The paper turns blue. What is element E?...

2009 Summer

Theory

CH11 - ACIDS AND BASES

The graph shows how the pH of soil in a field changed over time.At which point was the soil neutral?[Graph displaying pH changes over time with points...

2009 Summer

Theory

CH11 - ACIDS AND BASES

Aqueous sodium hydroxide is added to a solution of a salt. A blue precipitate is formed which does not dissolve in excess.Aluminium foil is added to t...

2009 Summer

Theory

CH11 - ACIDS AND BASES

Substance K reacts with sodium carbonate to form a gas.The gas turns limewater cloudy.What is substance K and which process takes place in the reactio...

2009 Summer

Theory

CH1 - STATES OF MATTER

The changes that occur when a substance changes state are shown below.Which process, W, X, Y or Z, is occurring in the following four situations?1. Bu...

2015 Summer

Theory

CH1 - STATES OF MATTER

A student uses the apparatus shown in the diagram below to measure the volume of carbon dioxide gas made when different masses of marble chips are add...

2015 Summer

Theory

CH3 - ATOMS AND ELEMENTS

Atoms contain electrons, neutrons and protons. What is the definition of nucleon number? A the number of neutrons in the nucleus of an atom B the numb...

2015 Summer

Theory

CH3 - ATOMS AND ELEMENTS

The diagram shows the atomic structure of an element X. What is X?A. aluminiumB. berylliumC. boronD. fluorine

2015 Summer

Theory

CH3 - ATOMS AND ELEMENTS

Which statements comparing the properties of electrons, neutrons and protons are correct?[Table_1]Table:| | neutrons and protons are both heavier th...

2015 Summer

Theory

CH4 - ATOMS COMBINING

Rescuers are drilling through fallen rock in order to rescue some men trapped in a cave. The drill needs lubricating from time to time.The following s...

2015 Summer

Theory

CH4 - ATOMS COMBINING

In which compounds are pairs of electrons shared between atoms?1. methane2. lead bromide3. sodium chlorideA. 1 onlyB. 2 onlyC. 1 and 3D. 1, 2 and 3

2015 Summer

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

What is the relative formula mass, $M_r$, of $CaCO_3$?A. 50B. 68C. 100D. 204

2015 Summer

Theory

CH1 - STATES OF MATTER

Copper and hydrogen can each be formed by electrolysis. At which electrodes are these elements formed? [Table_1]

2015 Summer

Theory

CH1 - STATES OF MATTER

The diagram shows a failed attempt to copper-plate a pan.Which action will plate the pan with copper?A. cooling the copper sulfate solution in an ice ...

2015 Summer