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

CH2 - SEPARATING SUBSTANCES

Petroleum is a useful natural resource.The diagram shows how petroleum can be separated into useful substances.(a) What is the name of the separation ...

2020 Spring

Theory

CH11 - ACIDS AND BASES

Aluminium is extracted from its ore. The ore is converted into pure aluminium oxide, which then undergoes electrolysis as shown.(a) (i) Name an ore of...

2020 Spring

Theory

CH12 - THE PERIODIC TABLE

(a) Identify the element which is in Group VI and Period 4...............................................................................................

2020 Spring

Theory

CH13 - THE BEHAVIOR OF METALS

Iron is a typical transition element.Iron:● acts as a catalyst● forms coloured compounds● has more than one oxidation state.(a) Name one major i...

2020 Spring

Theory

CH18 - POLYMERS

There are two types of polymers.(a) Addition polymers are made from many identical small units. (i) What is the term used to describe these small unit...

2020 Spring

MCQ

CH1 - STATES OF MATTER

A mixture of ice and water is left to stand and the ice melts.Which row describes what happens as the ice is melting?[Table_1]temperature of mixture |...

2020 Summer

MCQ

CH1 - STATES OF MATTER

Which piece of apparatus should be used to measure exactly 21.4 cm$^3$ of water?

2020 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

The chromatogram for an unknown dye is shown.What is the $R_f$ value of the dye?

2020 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The atomic number and nucleon number of a potassium atom are shown.[Table_1]How many protons, neutrons and electrons are in a potassium ion, K⁺?

2020 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The electronic structures of two atoms, P and Q, are shown. P and Q combine together to form a compound.What is the type of bonding in the compound an...

2020 Summer