9.4. Reactivity series
A subsection of Chemistry, 0620, through 9. Metals
Listing 10 of 452 questions
This question is about metals and metal compounds. Table5.1 shows some properties of some GroupI metals. Table 5.1 metal melting point in °C boiling point in °C observations on reaction with water solubility of metal hydroxide in g / dm3 at room temperature sodium bubbles form rapidly but no flame potassium rubidium explodes caesium explodes Use the information in Table 5.1 to predict: the melting point of rubidium ���������������������������������������������������������������������������������������� the solubility of sodium hydroxide at room temperature ����������������������������������������������� the observations when potassium reacts with water the physical state of caesium at 20 °C. Give a reason for your answer. physical state reason Iron is extracted in a blast furnace by reduction of iron(oxide, Fe2O3, with carbonmonoxide. Carbonmonoxide is produced by the reaction of carbon with carbondioxide. C + CO2 → 2CO Explain how this equation shows that carbondioxide is reduced. Name the type of chemical reaction where oxidation and reduction take place simultaneously. Calciumcarbonate is added to the blast furnace. The calciumcarbonate undergoes thermal decomposition. State the meaning of the term thermal decomposition. Stainless steel is an alloy of iron. Give one reason why alloys are more useful than pure metals. Brass is an alloy. Choose the diagram, A, B, C or D, in Fig.5.1 that best shows the structure of brass. Zn Zn Cu Zn Cu Cu Zn Cu Cu Zn Cu Zn A Cu Cu Cu Cu Cu Zn Zn Zn Zn Zn B Cu Fe Fe Zn Cu Cu Zn Zn Fe Cu Zn Fe C Fe Fe Fe Zn Zn Fe Fe Fe Fe Zn Fe Zn D diagram Table 5.2 gives some observations about the reactivity of four metals with dilute hydrochloricacid. Table 5.2 metal observations iron bubbles form slowly magnesium bubbles form very quickly mercury no bubbles form tin bubbles form very slowly Put the four metals in order of their reactivity. Put the least reactive metal first. least reactive most reactive 
0620_w23_qp_31
THEORY
2023
Paper 3, Variant 1
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This question is about metals. Table5.1 shows some properties of some GroupI metals. Table 5.1 metal melting point in °C boiling point in °C atomic volume in cm3 / mol observations on reaction with water lithium 12.9 sodium 23.7 bubbles form rapidly but no flame potassium 45.4 bubbles form rapidly and flame seen rubidium explodes Use the information in Table5.1 to predict: the boiling point of sodium the atomic volume of rubidium the observations when lithium reacts with water the physical state of lithium at 1300 °C. Give a reason for your answer. physical state reason  Iron is extracted in a blast furnace by reduction of iron(oxide, Fe2O3, with carbonmonoxide. Fe2O3 + 3CO → 2Fe + 3CO2 Explain how this equation shows that iron(oxide is reduced. Choose the phrase which describes the meaning of (in iron(oxide. Tick (✓) one box. the number of oxygen atoms in iron(oxide the oxidation number of iron in iron(oxide the number of CO molecules which react with iron(oxide the number of electrons in one atom of iron  Calciumcarbonate is added to the blast furnace. The calciumcarbonate undergoes thermal decomposition. Complete the word equation for the thermal decomposition of calciumcarbonate. calcium carbonate → +  Stainless steel is an alloy. Choose the diagram, A, B, C or D, in Fig.5.1 that best shows the structure of an alloy. A B C D diagram Give one reason for using stainless steel instead of pure iron for cutlery. Table5.2 gives the observations when four different metals react with dilute hydrochloricacid. Table 5.2 metal observations iron bubbles form slowly mercury no bubbles seen strontium bubbles form very quickly tin bubbles form very slowly Put the four metals in order of their reactivity. Put the least reactive metal first. least reactive most reactive  
0620_w23_qp_32
THEORY
2023
Paper 3, Variant 2
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