MCQ

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

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Which relative molecular mass, $M_r$, is \textbf{not} correct for the molecule given?[Table_1]

2009 Summer

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Nitrogen and hydrogen react together to form ammonia.$$\text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3$$When completely converted, 7 tonnes of nitro...

2009 Summer

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Which relative molecular mass, $M_r$, is not correct for the molecule given? [Table_1]

2009 Summer

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

For each atom of carbon present in a molecule, there is an equal number of atoms of oxygen but twice as many atoms of hydrogen. What is the formula of...

2009 Winter

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Water is formed when 48 g of oxygen combine with 6 g of hydrogen.What mass of oxygen combines with 2 g of hydrogen?

2009 Winter

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

For each atom of carbon present in a molecule, there is an equal number of atoms of oxygen but twice as many atoms of hydrogen. What is the formula o...

2009 Winter

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Water is formed when 48 g of oxygen combine with 6 g of hydrogen.What mass of oxygen combines with 2 g of hydrogen?

2009 Winter

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Hydrogen and chlorine react as shown.1 molecule of hydrogen + 1 molecule of chlorine \rightarrow 2 moles of hydrogen chloride.What is the equation for...

2010 Summer

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Hydrogen and chlorine react as shown. 1 molecule of hydrogen + 1 molecule of chlorine → 2 molecules of hydrogen chloride What is the equation for ...

2010 Summer

MCQ

CH1 - STATES OF MATTER

The diagram shows a cup of tea. Which row describes the water particles in the air above the cup compared with the water particles in the cup? [Tabl...

2013 Summer

MCQ

CH11 - ACIDS AND BASES

Crystals of sodium chloride were prepared by the following method.1. 25.0 cm3 of dilute hydrochloric acid was accurately measured into a conical flask...

2013 Summer

MCQ

CH11 - ACIDS AND BASES

Lead iodide is insoluble in water. Lead iodide is made by adding aqueous lead nitrate to aqueous potassium iodide. Which pieces of apparatus are neede...

2013 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

Element X is represented by $^{27}_{13}\text{X}$.Which statement about element X is correct?

2013 Summer

MCQ

CH12 - THE PERIODIC TABLE

The positions of four elements are shown on the outline of the Periodic Table.Which element forms a coloured oxide?

2013 Summer

MCQ

CH4 - ATOMS COMBINING

For which substance is the type of bonding not correct? [Table_1]

2013 Summer

MCQ

CH4 - ATOMS COMBINING

Element X has six electrons in its outer shell. How could the element react?

2013 Summer

MCQ

CH1 - STATES OF MATTER

The diagram shows an incomplete circuit. Which substance causes the lamp to light when added to the glass tube?

2013 Summer

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

A compound with the formula $XF_2$ has a relative formula mass of 78. What is element X?

2013 Summer

MCQ

CH13 - THE BEHAVIOR OF METALS

What is the balanced chemical equation for the reaction between calcium and water?

2013 Summer