We hold fewer questions than the paper printed. The rest are not in the bank yet.
An ion of an element X is represented as follows, with W above and to the left of the symbol, Y above and to the right, and Z below and to the left.
Which statement about X is true?
The diagram shows the structure of a neutral atom of an element, with two electrons on the inner shell and four on the outer shell.
How many protons does the atom have ?
The diagram shows the atomic structure of a neutral atom of an element z, with two electrons on the inner shell and five on the outer shell.
To which group of the periodic table does element z belong ?
Which row correctly describes the states of the substances at room temperature and pressure?
| solid | liquid | gas | |
|---|---|---|---|
| A | mercury | carbon dioxide | napthalene |
| B | Mercury | napthalene | carbon dioxide |
| C | napthalene | mercury | carbon dioxide |
| D | carbon dioxide | napthalene | mercury |
The diagram shows a fractional distillation plant for distilling crude oil, with the fractions drawn off from the column in the order petroleum gas, petrol (gasoline), naphtha, kerosene (paraffin), diesel, lubricating oil and bitumen from the top down.
Which fraction has compounds with the highest boiling point range ?
The diagram shows a simple cell, with metal X and metal Y dipping into dilute sulphuric acid and joined through a voltmeter. The arrows show electrons leaving metal X, passing through the external circuit and arriving at metal Y.
Which combination of metals would allow electrons to flow in the direction shown?
The diagram shows results obtained when aqueous sodium hydroxide was added to solution X and heated. Damp red litmus paper held at the mouth of the tube turns blue.
Which ion was present in solution X ?
The equation shows the dissolution of ammonium chloride.
NH4Cl(s) + (aq) -> NH4+(aq) + Cl-(aq)
Which diagram A, B, C or D shows the energy profile for the dissolution?
Which option gives the correct catalyst for the given process ?
| process | catalyst | |
|---|---|---|
| A | hydrogenation | platinum |
| B | ostwald | vanadium (v) oxide |
| C | contact | nickel |
| D | haber | iron |
The table shows some physical properties of elements W, X, Y and Z.
| element | electrical conductivity | heat conductivity | lusture |
|---|---|---|---|
| W | none | none | dull |
| X | good in solid and liquid state | good | shiny |
| Y | conducts in solid | none | dull |
| Z | none | none | shiny |
Which element W, X, Y or Z is metallic ?
An ester has the chemical formula:
CH3COOCH2CH3
Which compounds react to produce the ester ?
A volume of 25 cm3 of 0.20 moldm-3 hydrochloric acid was neutralised by 50 cm3 of 0.10 moldm-3 sodium hydroxide. The temperature increased by 14 degrees C. The energy change for the reaction was 4 410 J.
The enthalpy change of neutralisation was
The equation shows the decomposition of calcium carbonate.
CaCO3(s) -> CaO(s) + CO2(g)
20 g of CaCO3(s) was heated until no more change was observed.
The volume of carbon oxide gas produced at r.t.p was
The chemical equation shows the formation of hydrogen iodide from hydrogen and iodine.
H2(g) + I2(g) <=> 2HI(g)
What is the effect of increasing pressure on the yield of hydrogen iodide?
The diagram shows the structural formula of an organic compound: a chain of three carbon atoms, each with hydrogens, with an OH group on the third carbon.
The name of the organic compound shown is
Zinc metal reacts with a solution of copper (II) sulphate according to the equation
Zn(s) + CuSO4(aq) -> ZnSO4(aq) + Cu(s)
The following are all observations made except
A 27 g sample of X burns in chlorine to produce 133.5 g of the chloride.
What is the empirical formula of the chloride given that Ar of X is 27 ?
Sit the paper here to see which ones you got right. Danho explains every question, keeps your score, and works without a connection.