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 diagrams show the arrangement of particles in three different physical states of substance X.Which statement about the physical states of substanc...

2011 Summer

Theory

CH2 - SEPARATING SUBSTANCES

An aqueous solution is coloured. Which method of separation would show that the solution contains ions of different colours? A chromatography B crysta...

2011 Summer

Theory

CH2 - SEPARATING SUBSTANCES

The table gives the solubility of four substances in ethanol and in water.A mixture containing all four substances is added to ethanol, stirred and fi...

2011 Summer

Theory

CH4 - ATOMS COMBINING

Which two elements react together to form an ionic compound? [Table_1] A. W and X B. X and Y C. Y and Z D. Z and W

2011 Summer

Theory

CH3 - ATOMS AND ELEMENTS

The diagram shows part of the Periodic Table.Which element is correctly matched with its electronic structure?[Table_1: electronic structure]A: 2,8,1B...

2011 Summer

Theory

CH4 - ATOMS COMBINING

In the diagrams, circles of different sizes represent atoms of different elements.Which diagram represents hydrogen chloride gas?Options: A, B, C, D

2011 Summer

Theory

CH4 - ATOMS COMBINING

The nucleon number and proton number of the lithium atom are shown by the symbol $^7_3\text{Li}$.What is the correct symbol for the lithium ion in lit...

2011 Summer

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

What is the relative molecular mass ($M_r$) of HNO$_3$? A 5 B 31 C 32 D 63

2011 Summer

Theory

CH14 - MAKING USE OF METALS

Electricity from a power station passes through overhead cables to a substation and then to a school where it is used to electrolyse concentrated hydr...

2011 Summer

Theory

CH1 - STATES OF MATTER

Which statement about the electrolysis of molten lead(II) bromide is correct? A A colourless gas is seen at the cathode. B A grey metal is seen at...

2011 Summer