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

2

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 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

1

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

2

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

2

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

2

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

2

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

1

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

2

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

2

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

2

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

2