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QUESTION 3 Lis attentivement l’article ci-dessous. Ensuit…

QUESTION 3 Lis attentivement l’article ci-dessous. Ensuite, réponds aux questions en choisissant l’option correcte. Carefully read the article below. Then answer the questions by choosing the correct option.   CLICK ON THE BUTTON BELOW TO SEE THE READ THE ARTICLE FOR QUESTION 3.  

SECTION A – READING QUESTION 1 Fais correspondre les…

SECTION A – READING QUESTION 1 Fais correspondre les 5 images avec les mots corrects du tableau ci-dessous.  Attention, il y a un mot supplémentaire qui n’est pas nécessaire.   Match the 5 pictures with the correct words from the table below. Be careful, there is one extra word that is not needed. Example:  Answer:       cinq ONLY CLICK ON THE BUTTON BELOW IF YOU NEED TO SEE THE IMAGES FOR QUESTION 1 IN A LARGER FORMAT.     cinq sept neuf   douze trois vingt-quatre 1.1 (1) 1.2 (1) 1.3 (1) 1.4   (1) 1.5 (1)

QUESTION 2   Fais correspondre les images avec les phr…

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)

QUESTION 3   Substances can be elements, compounds or…

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 nit…

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)