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WorksheetsF3-Final-Exam Revision (Q1)
Total questions: 12
Worksheet time: 7mins
Which of the following methods can be used to obtain magnesium from magnesium compounds?
Electrolysis of a molten magnesium compound
Electrolysis of an aqueous solution of a magnesium compound
Heating magnesium oxide with carbon
Heating magnesium oxide strongly
Both radium (Ra) and calcium (Ca) belong to the same group of the Periodic Table. Which of the following statements is INCORRECT?
Radium is a good conductor of electricity in the solid state.
Radium atoms readily donate electrons to form Ra2+ ions.
Both radium and calcium become tarnished after exposed to air for some time.
Radium is less reactive than calcium.
Which of the following statements concerning an aluminium ore consisting mainly of Al2O3 is correct?
(Relative atomic masses: O = 16.0, Al = 27.0)
Carbon can be used to extract aluminium from this ore.
The abundance of this ore in the earth crust is very low.
This ore contains more than 55% of aluminium by mass.
Aluminium can be extracted from this ore due to the advancement of technology in applying electricity.
Which of the following statements concerning the extraction of metals is INCORRECT?
Silver and oxygen form when silver oxide is heated in air.
Lead forms a less stable oxide than aluminium, so it is easier to extract lead from its oxide compared with aluminium.
Gold can be obtained from its ore by panning.
Magnesium and oxygen are produced when magnesium oxide is heated with carbon.
X, Y, and Z are metals. When placed into a solution of copper(II) sulphate respectively, X and Z dissolve but Y does not. X is extracted from its ore by electrolysis. Z can be reduced by heating with carbon. Which of the following shows the reactivity of these three metals in decreasing order?
X, Y, Z
X, Z, Y
Y, X, Z
Z, Y, X
Caesium and sodium are in the same group in the Periodic Table. Which of the following statements is INCORRECT?
The chemical formula of caesium sulphate is Cs2SO4.
Caesium loses electrons to form cations.
Caesium reacts vigorously with cold water to give hydrogen.
Caesium burns in air to give a golden yellow flame.
Selenium (Se) is a Group VI element in the Periodic Table. Which of the following chemical formulae of selenium compounds is INCORRECT?
H2Se
AlSe3
CSe2
SeCl2
38Sr is a Group II element in the Periodic Table. Its electronic configuration is
2, 8, 18, 10.
2, 8, 18, 8, 2.
2, 8, 8, 18, 2.
8, 8, 18, 2, 2.
X, Y and Z are three different metals. X and Y react with hydrochloric acid but Z does not. X reacts quickly with cold water but Y does not. The correct order of reactivity of the metals is
X < Y < Z
Z < Y < X
Z < X < Y
X < Z < Y
Which of the following species does NOT contain dative covalent bond?
Carbon monoxide
Ammonium ion
Carbonate ion
Ozone
Hydrogen has three isotopes: 1H, 2H and 3H. How many types of hydrogen molecules could be found in nature?
3
4
6
9
Nichrome is an alloy with the chemical formula of Cr3Ni4. What is the percentage by mass of nickel in the alloy? (Relative atomic masses: Cr = 52.0, Ni = 58.7)
47.0%
53.0%
39.9%
60.1%
