MCQ

CH7 - REDOX REACTIONS

The reactions shown may occur in the air during a thunderstorm.$\text{N}_2 + \text{O}_2 \rightarrow 2\text{NO}$$2\text{NO} + \text{O}_2 \rightarrow 2\...

2009 Summer

MCQ

CH7 - REDOX REACTIONS

The reactions shown may occur in the air during a thunder storm.N\textsubscript{2} + O\textsubscript{2} \rightarrow 2NO2NO + O\textsubscript{2} \right...

2009 Summer

MCQ

CH7 - REDOX REACTIONS

The equations represent redox reactions. In which equation is the underlined substance acting as a reducing agent?

2009 Winter

MCQ

CH7 - REDOX REACTIONS

The equations represent redox reactions.In which equation is the underlined substance acting as a reducing agent?

2009 Winter

Theory

CH7 - REDOX REACTIONS

A student half-filled a syringe with water.She then carefully drew up some blue ink into the syringe so that it formed a separate layer below the wate...

2010 Summer

MCQ

CH7 - REDOX REACTIONS

The red colour in some pottery glazes may be formed as a result of the reactions shown.$$ ext{heat}\begin{align} \text{CuCO}_3 & \rightarrow \text{CuO...

2010 Winter

MCQ

CH7 - REDOX REACTIONS

The red colour in some pottery glazes may be formed as a result of the reactions shown.$\text{heat}$CuCO$_3$ $\rightarrow$ CuO + CO$_2$CuO + SnO $\rig...

2010 Winter

MCQ

CH7 - REDOX REACTIONS

The red colour in some pottery glazes may be formed as a result of the reactions shown.$$\text{heat}$$$$\text{CuCO}_3 \rightarrow \text{CuO} + \text{C...

2010 Winter

MCQ

CH7 - REDOX REACTIONS

The element vanadium, V, forms several oxides. In which change is oxidation taking place?

2012 Summer

MCQ

CH7 - REDOX REACTIONS

In which reaction is lead(II) oxide, PbO, oxidised?

2012 Summer

MCQ

CH1 - STATES OF MATTER

The changes that occur when a substance changes state are shown below.$$ \text{solid} \underset{Z}{\overset{W}{\leftrightarrows}} \text{liquid} \under...

2015 Summer

MCQ

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

MCQ

CH3 - ATOMS AND ELEMENTS

Atoms contain electrons, neutrons and protons.What is the definition of nucleon number?

2015 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

The diagram shows the atomic structure of an element X.What is X?

2015 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

Which statements comparing the properties of electrons, neutrons and protons are correct? [Table_1: Neutrons and protons are both heavier than electr...

2015 Summer

MCQ

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...

2015 Summer

MCQ

CH4 - ATOMS COMBINING

In which compounds are pairs of electrons shared between atoms?1. methane2. lead bromide3. sodium chloride

2015 Summer

MCQ

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

What is the relative formula mass, $M_r$, of CaCO$_3$?

2015 Summer

MCQ

CH1 - STATES OF MATTER

Copper and hydrogen can each be formed by electrolysis. At which electrodes are these elements formed? [Table_1]

2015 Summer

MCQ

CH1 - STATES OF MATTER

The diagram shows a failed attempt to copper-plate a pan.Which action will plate the pan with copper?

2015 Summer