MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Which equations are balanced?1 $ \quad \text{Fe}_{2}\text{O}_{3} + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_{2} $2 $ \quad \text{ZnCO}_{3} + 2\t...

2017 Summer

2

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Calcium carbide, CaC_2, reacts with water to form ethyne, C_2H_2, and calcium hydroxide. The equation for the reaction is shown.CaC_2(s) + 2H_2O(l) \r...

2017 Summer

3

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

A sample of 16.0g of a metal oxide, MO, is reduced to 12.8g of the metal, M.What is the relative atomic mass, $A_r$, of M?

2016 Summer

3

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

The equation for the reaction between phosphorus and oxygen is shown.$$xP_4 + yO_2 \rightarrow zP_2O_5$$Which values of x, y and z balance the equatio...

2017 Winter

3

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

The relative molecular mass of an alcohol is 88. Its percentage composition by mass is: C, 54.5%; H, 9.1%; O, 36.4%. Which row shows the empirical f...

2017 Winter

3

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

Aqueous iron(III) sulfate and aqueous sodium hydroxide react to give a precipitate of iron(III) hydroxide and a solution of sodium sulfate. What is th...

2017 Summer

1

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

The equation for the reaction between sodium carbonate and dilute hydrochloric acid is shown.\[ \text{Na}_2\text{CO}_3 + 2\text{HCl} \rightarrow 2\tex...

2017 Summer

2

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

The equation shows the complete combustion of propane.C$_3$H$_8$(g) + 5O$_2$(g) → 3CO$_2$(g) + 4H$_2$O(l)Which statement is correct?

2016 Winter

2

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

The equation represents the reaction between solid magnesium oxide and dilute hydrochloric acid to form magnesium chloride and water.$$\text{MgO} + 2\...

2017 Winter

2

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

A compound contains 34.5% calcium, 24.1% silicon and 41.4% oxygen by mass.What is its empirical formula?

2017 Winter

3

Theory

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?[Table_1...

2013 Summer

1

Theory

CH11 - ACIDS AND BASES

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

2013 Summer

2

Theory

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 needed ...

2013 Summer

2

Theory

CH3 - ATOMS AND ELEMENTS

Element X is represented by $^{27}_{13}X$.Which statement about element X is correct?A. An atom of X contains 13 protons and 13 neutrons.B. An atom of...

2013 Summer

1

Theory

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

2

Theory

CH4 - ATOMS COMBINING

For which substance is the type of bonding \textbf{not} correct?[Table_1]The table contains the following:\begin{center}\begin{tabular}{|c|c|c|c|}\hli...

2013 Summer

2

Theory

CH4 - ATOMS COMBINING

Element X has six electrons in its outer shell. How could the element react? A by gaining two electrons to form a positive ion B by losing six elec...

2013 Summer

1

Theory

CH1 - STATES OF MATTER

The diagram shows an incomplete circuit. Which substance causes the lamp to light when added to the glass tube? A. aqueous sodium chloride B. aqu...

2013 Summer

3

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

A compound with the formula XF$_2$ has a relative formula mass of 78.What is element X?A) argonB) calciumC) neonD) zirconium

2013 Summer

1

Theory

CH13 - THE BEHAVIOR OF METALS

What is the balanced chemical equation for the reaction between calcium and water?A. $\text{Ca} + \text{H}_2\text{O} \rightarrow \text{CaOH} + \text{H...

2013 Summer

2