9.4. Reactivity series
A subsection of Chemistry, 0620, through 9. Metals
Listing 10 of 452 questions
This question is about GroupI elements and their compounds. The properties of some GroupI elements are shown in the table. element boiling point / °C atomic radius / pm relative thermal conductivity observations when it reacts with cold water sodium 3.9 rapid bubbling but does not burst into flame potassium very rapid bubbling and bursts into flame rubidium 1.6 caesium 1.0 explodes Complete the table to estimate: ● ● the relative thermal conductivity of potassium ● ● the atomic radius of rubidium.  Describe the trend in the boiling points of the GroupI elements. Use the information in the table to predict what you would observe when rubidium reacts with cold water. Which one of the statements about the formation of a sodium ion from a sodium atom is correct? Tick one box. A sodium atom gains an electron. A sodium atom loses an electron. A sodium atom loses a proton. A sodium atom gains a proton.  Is sodium oxide an acidic oxide or a basic oxide? Give a reason for your answer. A compound of sodium has the formula C4H5Na. Calculate the relative formula mass of C4H5Na. Show all your working. Use your Periodic Table to help you.  relative formula mass = Complete the word equation for the reaction of sodium hydroxide with sulfuric acid. sodium hydroxide + sulfuric acid +  
0620_s18_qp_31
THEORY
2018
Paper 3, Variant 1
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This question is about manganese and its compounds. Potassiummanganate(is soluble in water. A purple crystal of potassiummanganate(was placed in the middle of a piece of damp filter paper. After 1hour, the purple colour had spread over most of the filter paper. crystal of potassium manganate(at the start after 1 hour Explain these observations using the kinetic particle model. Potassiummanganate(is produced from manganese(oxide by an oxidation reaction. What is meant by the term oxidation? Potassium manganate(decomposes when heated. The products are oxygen and manganese(oxide. Describe a test for oxygen. test result  Manganese(oxide reacts with concentrated hydrochloricacid. Balance the chemical equation for this reaction. MnO2 + HCl MnCl 2 + Cl 2 + H2O  The table compares the reactivity of four metals with hydrochloric acid of the same concentration. metal reactivity with hydrochloric acid lead No bubbles seen. Metal does not disappear. magnesium Rapid formation of bubbles. Metal disappears rapidly. manganese Steady formation of bubbles. Metal disappears slowly. tin Bubbles formed slowly. Metal disappears very slowly. Use this information to put the metals in order of their reactivity. Put the least reactive metal first. least reactive most reactive  Manganese is a transition element. Sodium is an element in Group I of the Periodic Table. Describe three ways in which the properties of manganese differ from those of sodium.  
0620_s18_qp_32
THEORY
2018
Paper 3, Variant 2
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Sulfur dioxide is a pollutant in the air. State one source of sulfur dioxide in the air. Sulfur dioxide is oxidised to sulfur trioxide in the air. Oxides of nitrogen act as catalysts for this reaction. What is meant by the term catalyst ? Sulfur trioxide dissolves in rainwater to form acid rain. Which one of the following pH values could be the pH of acid rain? Draw a circle around the correct answer. pH 4 pH 7 pH 9 pH 13  State one adverse effect of acid rain on buildings. Sulfur dioxide melts at –73 °C and boils at –10 °C. What is the physical state of sulfur dioxide at –20 °C? Explain your answer. Excess sulfuricacid reacts with ammonia to make a salt which can be used as a fertiliser. State the name of the salt formed when excess sulfuricacid reacts with ammonia. The table shows some observations about the reactivity of four metals with dilute sulfuric acid. metal reaction with sulfuric acid iron a slow stream of bubbles is seen magnesium a rapid stream of bubbles is seen nickel a few bubbles slowly form tungsten no bubbles are seen Use the information in the table to put the four metals in order of their reactivity. Put the least reactive metal first. least reactive most reactive  
0620_s19_qp_31
THEORY
2019
Paper 3, Variant 1
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This question is about zinc and compounds of zinc. Describe how you could prepare a pure sample of crystals of hydrated zinc sulfate using dilute sulfuric acid and an excess of zinc. The equation shows the effect of heat on anhydrous zinc sulfate. heat ZnSO4 ZnO + SO3 What type of chemical reaction is this? Tick one box. addition decomposition displacement oxidation  When 12.60 g of anhydrous zinc sulfate is heated, the mass of zinc oxide formed is 6.34 g. Calculate the mass of zinc oxide formed when 63.0 g of anhydrous zinc sulfate is heated.  mass of zinc oxide = g Complete the table to calculate the relative formula mass of anhydrous zinc sulfate, ZnSO4. Use your Periodic Table to help you. type of atom number of atoms relative atomic mass zinc 1 × 65 = 65 sulfur oxygen  relative formula mass =  Complete the table to show the number of electrons, protons and neutrons in the sulfur atom and zinc ion shown. number of electrons number of neutrons number of protons 36S 67Zn2+  An alloy contains zinc, copper and aluminium. What is meant by the term alloy? 
0620_s19_qp_33
THEORY
2019
Paper 3, Variant 3
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Questions Discovered
452