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 the result of dropping a purple crystal into water.Which processes take place in this experiment?[Table_1]| | chemical reac...

2014 Summer

1

Theory

CH2 - SEPARATING SUBSTANCES

The four pieces of apparatus shown below are used in chemical experiments.Which statement about the apparatus is correct?A. The burette measures the v...

2014 Summer

1

Theory

CH2 - SEPARATING SUBSTANCES

Alcohol and water are completely miscible. This means when mixed together they form only one liquid layer.Which method is used to separate alcohol fro...

2014 Summer

2

Theory

CH3 - ATOMS AND ELEMENTS

The diagram shows the structure of an atom of element X. What is X?A. boronB. carbonC. sodiumD. sulfur

2014 Summer

3

Theory

CH3 - ATOMS AND ELEMENTS

The diagrams show four particles. Which two diagrams show atoms that are isotopes of each other?A 1 and 2B 1 and 3C 2 and 3D 2 and 4

2014 Summer

2

Theory

CH4 - ATOMS COMBINING

The 'lead' in a pencil is made of a mixture of graphite and clay. When the percentage of graphite is increased, the pencil slides across the paper mor...

2014 Summer

1

Theory

CH4 - ATOMS COMBINING

Element X is in Group I of the Periodic Table. X reacts with element Y to form an ionic compound.Which equation shows the process that takes place whe...

2014 Summer

2

Theory

CH4 - ATOMS COMBINING

Solid F is an element.Solid G is a compound.Neither solid conducts electricity but G conducts electricity when dissolved in water.These properties sug...

2014 Summer

3

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

A compound contains one atom of calcium, two atoms of hydrogen and two atoms of oxygen.What is the correct chemical formula of the compound?A CaO_2H_2...

2014 Summer

1

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

In athletics, banned drugs such as nandrolone have been taken illegally to improve performance. Nandrolone has the molecular formula $C_{18}H_{26}O_{2...

2014 Summer

1