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

1

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

2

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

2

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

2

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

1

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

2

MCQ

CH1 - STATES OF MATTER

Small crystals of purple $\text{KMnO}_4$ $(M_r = 158)$ and orange $\text{K}_2\text{Cr}_2\text{O}_7$ $(M_r = 294)$ were placed at the centres of separa...

2017 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

Pure water has a boiling point of 100 °C and a freezing point of 0 °C. What is the boiling point and freezing point of a sample of aqueous sodium c...

2017 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

A chromatogram obtained from the chromatography of four substances is shown. Which substance has an $R_f$ value of 0.6?

2017 Summer

2

MCQ

CH3 - ATOMS AND ELEMENTS

Sodium reacts with chlorine to form sodium chloride.Which statements describe what happens to the sodium atoms in this reaction?1. Sodium atoms form p...

2017 Summer

1

MCQ

CH3 - ATOMS AND ELEMENTS

Diamond is extremely hard and does not conduct electricity.Which statement explains these properties?

2017 Summer

2

MCQ

CH4 - ATOMS COMBINING

Which statement about metals is not correct?

2017 Summer

1

MCQ

CH4 - ATOMS COMBINING

Aluminium reacts with fluorine.$xAl(s) + yF_2(g) \rightarrow zAlF_3(s)$Which values of $x$, $y$ and $z$ balance the equation?[Table_1]

2017 Summer

2

MCQ

CH4 - ATOMS COMBINING

Carbon monoxide burns in oxygen to produce carbon dioxide. $$2\text{CO}(g) + \text{O}_2(g) \rightarrow 2\text{CO}_2(g)$$ Which mass of carbon dioxide...

2017 Summer

1

MCQ

CH1 - STATES OF MATTER

Which statement about electrolysis is correct?

2017 Summer

1

MCQ

CH1 - STATES OF MATTER

The reactivity series for a number of different metals is shown.[Image_1: Reactivity series and diagram]The diagram shows different metal strips dippe...

2017 Summer

2