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)

INSTRUCTIONS 1. Ensure that you answer all the questions. 2. All questions must be answered on paper. Graphs must be done on graph paper. Upload your final answer paper as one file in the upload quiz. Name your file NAME_IG_NOV_1C_EXAM. 3. You must start the upload quiz immediately after finishing the quiz. This will be monitored and your test may not be marked if you do not start the upload quiz immediately. Enough time has been allocated to the upload quiz for scanning and submitting. 4. Calculators may be used. 5. Only the specification Periodic Table may be used. There is a link to it below if you have not printed a copy. 6. Any pictures related to questions can be accessed by pressing on the related button. 7. It is in your own interest to read each question carefully before answering     Right-click on the button to open the Periodic Table in a new tab.   Right-click on the button to open the diagram pdf in a new tab.  

The coping strategy of threat minimization is best catagorized as which of the following types of coping?

Universal precautions refers to the set of procedures recommended by various governmental and health agencies to prevent the spread of infection.

QUESTION 12   Dilute sulfuric acid can be used to make soluble and insoluble salts.   a A student plans an experiment to obtain a pure, dry sample of the soluble salt, sodium sulfate, from dilute sulfuric acid.   a(i) The student does a titration to find the volume of sulfuric acid needed for complete reaction with the other reactant.   Describe the steps she should take in her titration. Refer to these pieces of apparatus in your answer.·            pipette·            burette·            conical flask (5) a(ii) The diagram (see diagram pdf) shows the burette readings in one titration.   Use these readings to complete the table, giving all values to the nearest 0.05 cm3.   Burette reading in cm3 after adding solution Burette reading in cm3 before adding solution Volume of solution added in cm3 (3) b The student plans a different experiment to obtain a pure, dry sample of the insoluble salt, barium sulfate, from dilute sulfuric acid.   Describe the steps she should take in her experiment. (5)