NEW
Font size
WorksheetsPractice Paper
Total questions: 10
Worksheet time: 10mins
A
B
C
D
Substance L melts at –7 °C and is a brown liquid at room temperature. Which temperature is the boiling point of pure L?
–77 °C
–7 °C to +7 °C
59 °C
107 °C to 117 °C
Chromatography is done on a mixture containing a drug. The drug has an Rf value of 0.66. The diagram is not drawn to scale.
Which spot on the chromatogram represents the drug?
A
B
C
D
Caesium, Cs, is an element in Group I of the Periodic Table. When caesium reacts it forms a positive ion, Cs+. How is a caesium ion formed?
A caesium atom gains a proton.
A caesium atom gains an electron.
A caesium atom loses an electron.
A caesium atom shares an electron.
The structure of copper is described as a lattice of positive ions in a ‘sea of electrons’. Which statements are correct?
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
The concentration of a hydrochloric acid solution is 0.5 mol / dm3. How many moles of hydrochloric acid are present in 25 cm3 of this solution?
0.0125
0.0200
12.5
20.0
A sample of an iron oxide contains 50.4 g of iron and 21.6 g of oxygen. What is the empirical formula of the iron oxide?
FeO
FeO3
Fe2O3
Fe3O2
Methane burns in oxygen to form carbon dioxide and water. CH4 + 2O2 → CO2 + 2H2O
The bond energies are shown in the table.
What is the energy change for the reaction?
–818 kJ / mol
–323 kJ / mol
+323 kJ / mol
+818 kJ / mol
A sample of solid X was added to three different solutions to predict the position of X in the reactivity series.
X(s) + FeSO4(aq) → no reaction
X(s) + 2HCl(aq) → XCl 2(aq) + H2(g)
X(s) + Zn(NO3)2(aq) → no reaction
Which other solution would react with solid X?
CaSO4(aq)
CuSO4(aq)
MgSO4(aq)
Na2SO4(aq)
The structure of a chlorofluorocarbon polymer is shown. Which monomer is used to make this polymer?
