Theory

CH15 - AIR AND WATER

An iron nail is placed in a closed test-tube, containing gas L. The nail rusts.What is gas L...

2009 Summer

Theory

CH15 - AIR AND WATER

Which statements are correct?1. Carbon monoxide is responsible for the production of ‘acid rain’.2. Oxides of nitrogen are present in car exhausts...

2009 Summer

Theory

CH15 - AIR AND WATER

The diagram shows stages in the purification of water. Which stage uses chlorine?

2009 Summer

Theory

CH15 - AIR AND WATER

An inert atmosphere is needed in a lamp to lengthen the useful life of the metal filament. Why is argon, rather than helium, used for this purpose? ...

2009 Summer

Theory

CH15 - AIR AND WATER

The diagram shows stages in the purification of water.Which stage uses chlorine?

2009 Summer

Theory

CH15 - AIR AND WATER

Which statements are correct?1. Carbon monoxide is responsible for the production of 'acid rain'.2. Oxides of nitrogen are present in car exhausts.3. ...

2009 Summer

Theory

CH15 - AIR AND WATER

An iron nail is placed in a closed test-tube, containing gas L. The nail rusts.What is gas L?A carbon dioxideB hydrogenC nitrogenD oxygen

2009 Summer

Theory

CH15 - AIR AND WATER

A newspaper article claims that carbon dioxide is formed as follows.1. during respiration2. when calcium carbonate reacts with hydrochloric acid3. whe...

2009 Winter

Theory

CH15 - AIR AND WATER

Which iron nail rusts? [Image_1: Four nails in test tubes labeled A (zinc coated nail), B (painted nail), C (nail in damp cloth), D (nail covered in ...

2009 Winter

Theory

CH15 - AIR AND WATER

A new planet has been discovered and its atmosphere has been analysed.[Image_1: A diagram showing a planet and its atmosphere is labeled]The table sho...

2009 Winter

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