What Happened Next Essay

3173 words - 13 pages

Paper Reference(s)
4335/2H London Examinations IGCSE Chemistry Paper 2H
Higher Tier Wednesday 17 June 2009 - Morning Time: 2 hours
Materials required for examination Items included with question papers Nil Nil
Instructions to Candidates In the boxes above, write your centre number, candidate number, your surname and initial(s) and your signature. The paper reference is shown at the top of this page. Check that you have the correct question paper. Answer ALL the questions. Writer your answers in the spaces provided in this question paper. Show all stages in any calculations and state the units. Calculators may be used. Some questions must be answered with a cross in a box ( ). If you change ...view middle of the document...

Use the Periodic Table on page 2 to help you answer this question.
(a) Identify the most reactive metallic element in the Periodic Table.
....................................................................................................................................... (1)
(b) Give the formula of the compound formed between sodium and the most reactive element in Group 7.
....................................................................................................................................... (1)
(c) All of the metals in Group 1 react with water. There are similarities between the reactions. Put a cross ( ) in three boxes to show which statements apply to the reactions of all Group 1 metals with water.
a flame is seen a solution of the metal hydroxide is formed a solution of the metal oxide is formed carbon dioxide is formed hydrogen is formed the metal sinks the solution formed is acidic the solution formed is alkaline
(3)
(d) The elements in Group 0 were originally thought to be totally unreactive. However, in 1962 the first compound of xenon was made but it was not until 2000 that the first compound of argon was made.
What does this order of discovery suggest about the trend in reactivity of the elements in Group 0?
.......................................................................................................................................
....................................................................................................................................... (1) Q2
(Total 6 marks)

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6
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3. Methane, CH4, is an organic compound. It is the first member of an homologous series of saturated hydrocarbons.
The displayed formula of methane is
(a) What is meant by the term hydrocarbon?
.......................................................................................................................................
.......................................................................................................................................
....................................................................................................................................... (2)
(b) What is meant by the term saturated?
.......................................................................................................................................
....................................................................................................................................... (1)
(c) Name the homologous series of which methane is the first member.
....................................................................................................................................... (1)
(d) Draw the displayed formula of the second member of this homologous series.
(2)
H C H
H
H

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(e) The displayed formulae of two other organic compounds are
(i) What is the molecular formula of these two compounds?...

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