National Chemistry

2010 Credit First thoughts

1. (a) Most viscous - must be an extreme - A or E
(b) Gas - how many carbons in a gas ?

2. (a) Page 2
(b) Must be similar elements as those in methane (formula?)
(c) Write the ions in each of the boxes.

3. (a) Write the number neutrons in each box.
(b) Write the electron arrangement of neon and then the electron arrangements of each of the particles in the six boxes.

4. Are the carbohydrates in the order you are used to.
(a) Odd one out - polymer
(b) Pair of mono!

5.(a) galvanISE
(b) Page 7 needed.

6. Write the molecular formula in each box.
 (a) General formula AND NOT react.
(b) List the three homologous series that you know well.
(c) Get the molecular formula of the compound in the question.

7.(a) What is made in the haber process/
(b) Alphabetical order O and ?

8. Two are correct, three are false
Do each statement as true/false

9. Usual gases are hydrogen, carbon dioxide and ammonia.
Beware unreactive metals

part 2

10. (a) Polymers are manufactured.
(b) (i) How many carbons in the backbone of the polymer ?
(ii) Look at the structure
(c) Look at the elements in the structure. Which gases are possible?

11. (a) (i) Making ethanol/alcohol
(ii) What are the elements in glucose ? What gas is possible?
(b) It is hotter - what does this do to the reaction.

12. (a) Must know gas tests.
(b) Label the axes (using words in the table) and fit scales to use up more than half the graph paper.
(c) Put a mark on the graph.
(d) how would higher concentration of acid affect the amount produced?
(e) Copy out equation and underline chemical told about and chemical asked about.

13. Read question from top.
(a)
(b) Green or yellow!
(c) Write out the two ions first.
14. (a) clues = liquid at room temp; does not conduct
(b) (i) Copy out equation and do working below it.
(ii) Place Ti on page 7

15.(a) As distance get greater .........................
(b) Gettying deeper.
(c) Selecting last word looks easier.

16. (a) (i)Get harge on sulphide ion.
(ii) Mass – so need mass of 1 mole.
(b)(i) Important metal- ‘F’urnace
(ii) Which of the three is the most reactive; which is hardest to extract.

17. (a) Spectators do not take part.
(b) ‘FE’ test
(c) Use page 7
(d) The reaction is described on the first line. Always read all of the question.

18. (a) Look at the names – eth and eth; meth and prop etc
(b) Page 6 – How many carbons?

19. Titration. Circle the figures in the diagram.
(a) From the three volumes given.
(b) You now have three figures to calculate a fourth.

20. Looks complex but do not let this put you off.
(a) (i) You are given two names – make up a third.
(ii) –CH2- goes between a hydrogen atom and another atom.
(b) What elements does it contain?

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