QUESTION 2   Fais correspondre les images avec les phrases. Choisis la bonne réponse: A? B? C? D?  E? ou F?   Look at the images below and choose the correct letter to go with each phrase. A? B? C? D?  E? ou F?   Example: Il porte une cravatte . Answer:  F   CLICK ON THE BUTTON BELOW TO SEE THE IMAGES FOR QUESTION 2.     2.1 Il a les cheveux courts, roux et bouclés. [ans1]   2.2 Il est de taille moyenne et il porte des lunettes. [ans2]   2.3 Elle est belle. Elle porte des boucles d’oreille. [ans3]   2.4 Il est beau, grand et chauve. [ans4]   2.5 Il a des cheveux blonds et il porte une chemise bleue. [ans5]         (5)

  Explain what “perfectly inelastic” supply means. Give an example of a goods with perfect inelastic supply.

2.5 J’habite au (4th) étage. (1)

QUESTION 3   Substances can be elements, compounds or mixtures.   a Which of these is a correct symbol for an element?      A   Fe    B   O2    C   H2O    D   H2O2 (1) b Which of these substances is a compound?      A   brass    B   helium    C   oxygen    D   water (1) c Which substance is a mixture                                                                                                                                                                                                    A   gold    B   hydrogen gas    C   air    D   water (1) d Paper chromatography is used to separate the dyes present in some inks.   A sample of ink, P, is spotted on to some chromatography paper. Four known inks, A, B, C and D, are also spotted on to the same paper.   The diagram (see the diagram pdf)shows how the experiment is set up and the paper at the end of the experiment.   d(i) State why the solvent level should not be above the base line at the start of the experiment. (1) d(ii) Explain which dye, present in one of the inks A, B, C or D, is also present in ink P. (2) d(iii) State why ink D does not move during the experiment. (1) d(iv) Dyes have an Rf value that can be calculated using the below expression.   Rf =   Complete the below table for the dye in ink B.   Distance moved by the dye in ink A in mm. Distance moved by solvent in mm. Rf value of dye in ink A. (2) e The diagram (see the diagram pdf) shows an experiment to demonstrate diffusion.   e(i) The word equation for the reaction that occurs in this experiment is   ammonia + hydrogen chloride → ammonium chloride   Complete the chemical equation for this reaction.   NH3 + HCl → ………………………………………… (1) e(ii) State the two state symbols that could be included in the chemical equation in part (e)(i).   s       g       l       aq (1)

QUESTION 6   Lithium and magnesium both react with nitrogen.   The chemical equation for the reaction between lithium and nitrogen is 6Li + N2 → 2Li3N   a  Write the chemical equation for the reaction between calcium and nitrogen. (2) b The equation for the reaction between lithium nitride and water is Li3N(s) + 3H2O(l) → 3LiOH(aq) + NH3(g)   b(i) Describe a chemical test to show that the gas given off is ammonia. (2) b(ii) A sample of 2.80 g of lithium nitride is added to an excess of water.   Calculate the amount, in moles, of Li3N in the sample of lithium nitride (2) b(iii) Calculate the amount, in moles, of LiOH in the lithium hydroxide formed. (1) b(iv) Calculate the volume of 0.200 mol/dm3 sulfuric acid required to neutralise exactly the amount of lithium hydroxide calculated in (b)(ii).   Give an appropriate unit.   The equation for the reaction is 2LiOH + H2SO4 → Li2SO4 + 2H2O (3)

QUESTION 8   A student uses the apparatus shown in the diagram pdf to investigate the heat energy released when nitric acid is added to potassium hydroxide solution.   She uses the below method. ·          put 25.0 cm3 of potassium hydroxide solution into the polystyrene   cup·          measure the temperature of the potassium hydroxide solution·          add 5.00 cm3 of nitric acid from the burette·          stir the mixture and measure the highest temperature reached·          add further 5.00 cm3 samples of nitric acid, stir and measure the highest temperature  reached after each addition    a Name the piece of apparatus that should be used to measure the 25.0 cm3 of potassium hydroxide solution. (1) b The table below shows the student’s results.   Total volume of acid added in cm3 0.00 5.00 10.00 15.00 20.00 25.00 30.00 Highest temperature reached in

QUESTION 5 a(i) Explain what is meant by the term covalent bonding. (2) a(ii) Draw a dot and cross diagram to show the bonding in a molecule of ethene, C2H6   Show only the outer electrons. (2) b Substances A and B are covalently bonded and have simple molecular structures.   The table below gives the boiling points for substances A and B.   Substance Boiling point in

QUESTION 1   When a liquid evaporates at room temperature, it changes into a gas.   The diagram (see the diagram pdf) shows the arrangement of the particles in a liquid.   a Complete the diagram to show the arrangement of four particles in a gas. (1) b Describe the movement of particles in a gas. (1) c Explain why heating a liquid causes it to evaporate more quickly. (2)

QUESTION 9   This question is about elements in Groups 1 and 7 of the Periodic Table.   a The diagram (see the diagram pdf) shows two ways in which potassium can be converted into potassium chloride.   Give the names of gas X, colourless solution Y and acid Z. (3) b When sodium is burned in bromine gas, sodium bromide is formed.   b(i) Write a chemical equation for the reaction between sodium and bromine. (1) b(ii) Give a test to show that an aqueous solution of sodium bromide contains bromine ions. (3)

QUESTION 2   This question is about the element beryllium.   a Use the words below to complete the sentences about beryllium.   electrons     negative     neutral     neutrons nucleus     positive     protons     shells   Each word may be used once, more than once or not at all.   An atom of beryllium has a central …………………………………………………….. that contains particles called …………………………………………………….. and …………………………………………………….. . Around these particles there are …………………………………………………….. orbiting in …………………………………………………….. . An atom of beryllium has no charge because it contains equal numbers of …………………………………………………….. and …………………………………………………….. . The particles with the lowest mass in an atom of beryllium are called …………………………………………………….. . (7) b Beryllium forms a compound with the formula BeCO3   b(i) How many different elements are there in BeCO3?   (1) b(ii) What is the total number of atoms in the formula BeCO3? (1)