igcse question explain why the metal calcium in bulgaria

11 0620 43 RP - GCE Guide

4 CLE 2019 062043N19 3 (a) Name the ore of aluminium which mainly consists of aluminium oxide. [1] (b) Aluminium is produced by the electrolysis of aluminium oxide dissolved in molten cryolite. negative electrode positive electrode molten mixture of aluminium oxide and cryolite aluminium waste gases (i) Give two reasons why the electrolysis is done using a molten mixture of aluminium oxide

IGCSE Chemistry Revision Flashcards | Quizlet

Start studying IGCSE Chemistry Revision. Learn vocabulary, terms, and more with flashcards, games, and other study tools. add magnesium or any named metal above Hydrogen in reactivity series but not above can neutralise this acid and increase the pH. Explain why calcium carbonate is a better choice.

Question paper 1 - Save My Exams

(b) Steel is an alloy containing iron. These are three differences between steel and aluminium. x steel can rust but aluminium resists corrosion x steel has a higher density than aluminium x steel is much stronger than aluminium (i) Use information from the list to suggest why steel is the better metal for making bridges. (1)

3.09 explain that all waves can be reflected and …

2:26 (Triple only) know that an alloy is a mixture of a metal and one or more elements, usually other metals or carbon; 2:27 (Triple only) explain why alloys are harder than pure metals (f) Acids, alkalis and titrations. 2:28 describe the use of litmus, phenolphthalein and methyl orange to distinguish between acidic and alkaline solutions

06 0620 42 3RP - Past Papers

7 (a)Displacement reactions occur between metals and metal ions. Displacement reactions can be used to determine the order of reactivity of metals such as lead (Pb), nickel (Ni), and silver (Ag). The ionic equation for a displacement reaction is shown. Ni(s) + Pb2+(aq) Pb(s) + Ni2+(aq) The ionic half-equations for this reaction are shown.

15.3_metals_qp_-_igcse_cie_chemistry_ …

View Essay - 15.3_metals_qp_-_igcse_cie_chemistry_-_extended_theory_paper.pdf from ENGLISH 30 at James Fowler High School. Properties of Metals Question Paper 3 Level

Volume I( 01-20) | Gases | Chlorine

Determine the metals in the starting mixture and their masses. SOLUTION Ionic hydrides are formed by coining of alkali metals or alkaline earth metals with hydrogen. In relation to the conditions in the task, there will be an alkali metal (M I) as well as an alkaline earth metal (M II) in the mixture.

IGCSE/Chemistry/ Dr/Green’s/pre>exam/checklist/

8. Explain why CO 2 is used in (i) fire extinguishers and (ii) fizzy drinks 9. State the name of one green house gas and describe its effect on global temperatures Hydrogen and water 1. Write chemical equations for the following metals with HCl and H 2SO 4 a. magnesium, aluminum, zinc and iron 2. Write an equation for the coustion of hydrogen 3.

The Reactivity Series and Corrosion of Metals - IGCSE-ALEVEL

The Reactivity Series and Corrosion of Metals The higher the metal in the series, the more reactive it is ie the faster, more vigorous and more exothermic the reaction. o At a more theoretical level, the more reactive a metal, the greater tendency it …

Caridge IGCSE Chemistry (0620)

Caridge IGCSE Chemistry (0620) From 2020, we have made some changes to the wording and layout of the front covers of our question papers to reflect the new Caridge International branding and to make instructions clearer for candidates - learn more. Past papers. June 2019 Question Paper 11 …

IGCSE Study Guides, Revision & Notes: Metals

The most reactive metals like potassium, sodium and magnesium will burn with a very bright flame and will tarnish quickly in open air. Moderately reactive metals such as magnesium, aluminium, zinc and iron burn in strong flame but don''t tarnish rapidly in open air. Iron as we know rusts to give a red-brownish compound (Fe 2 O 3). The least reactive metals such as lead and copper show oxidisation in strong …

Corrosion - Metals and corrosion - OCR Gateway - …

Metals and corrosion Rusting can be prevented by keeping oxygen and water away, and by sacial protection. An alloy is a mixture of elements, including at least one metal.

a) Extraction and uses of metals – IGCSE Chemistry …

12/03/2017· 5.1 explain how the methods of extraction of the metals in this section are related to their positions in the reactivity series Metal Way of extraction potassium sodium calcium magnesium aluminium extract by electrolysis carbon zinc iron tin lead extract by reaction with carbon or carbon monoxide hydrogen copper silver gold platinum extracted by various…

GCSE CHEMISTRY - The Structure of Metals …

a metal are sometimes called a "sea of electrons". The structure of a metal can also be shown as In the above picture the dotted lines represent the delocalised electrons. Delocalised electrons are also called free electrons because they can move very easily through the metal structure. It is these free electrons which give metals their properties.

gcse Metal Reactivity Series Worksheet of …

1. (a) Describe everything you see when sodium is added to water containing universal indior. (b) Name the two chemical products of sodium reacting with water and give the syol equation for the reaction of sodium with water. 2. (a) Describe the test and result for the gas produced in the reaction between calcium and cold water.(b) give the syol equation for magnesium reacting with cold

Ionic Bonding Exam Questions With Markschemes - …

Example GCSE Questions. All the questions on this page have featured in previous GCSE level exams at one point or another and this is a key topic - it will be in the exam. So check your answers against the markschemes and learn them! Remeer foundation tier questions can also appear in …

Caridge International Examinations Caridge

6 UCLES 2018 0653/31/M/J/18 3 Fig. 3.1 shows an airship carrying a heavy load. load airship Fig. 3.1 (a) The airship and load are floating above the ground. (i) On Fig. 3.1 draw two force arrows to show the vertical forces acting on the load. [2] (ii) At one point in its journey, the airship is moving and all the forces acting on the airship are balanced.

VMOU Question Papers - Dec 2010 Set 1 | Sales | …

VMOU Question Papers - Dec 2010 Set 1 - Free ebook download as PDF File (.pdf), Text File (.txt) or view presentation slides online. Each question carries equal marks. 1. Explain the functions of sales manager in controlling of salesman. 2. Write an essay on Iron Steel Industry of India. 15 iin ir ;-in ni n i lli | 15 7. Divide India

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Select region | Siyavula. Yes, I reside in United States. Change country/curriculum. We use this information to present the correct curriculum and to personalise content to better meet the needs of our users. Practice. back. Mathematics. Physics. Chemistry.

Question paper 1 - Save My Exams

(b) Steel is an alloy containing iron. These are three differences between steel and aluminium. x steel can rust but aluminium resists corrosion x steel has a higher density than aluminium x steel is much stronger than aluminium (i) Use information from the list to suggest why steel is the better metal for making bridges. (1)

Chem marks schemes Flashcards | Quizlet

Explain why electrolysis would not take place in the apparatus with a solid electrolyte (2) solid cant conduct electricity or needs to be in a solution because ions cannot move in …

11 0620 43 RP - GCE Guide

4 CLE 2019 062043N19 3 (a) Name the ore of aluminium which mainly consists of aluminium oxide. [1] (b) Aluminium is produced by the electrolysis of aluminium oxide dissolved in molten cryolite. negative electrode positive electrode molten mixture of aluminium oxide and cryolite aluminium waste gases (i) Give two reasons why the electrolysis is done using a molten mixture of aluminium oxide

CHEMISTRY 0620/31

Three dye mixtures, J, K and L, were spotted onto a piece of chromatography paper.Three pure dyes, X, Y and Z, were also spotted onto the same piece of paper. (d) The diagram shows the results of this chromatography. J K LX Y Z (i) Suggest why the base line was drawn in pencil and not in ink. [1] Which dye mixture, J, K or L, contains a dye which did not move during this

4.5_atoms_elements_and_compounds_qp_ …

(a) a) Why are batteries a convenient source of energy? [1] (ii) The engine will run on a small pack of jet fuel. What other chemical is needed to burn this fuel? [1] (b) Silicon has the same type of macromolecular structure as diamond. (i) Explain why one atom of either element can form four covalent bonds. [2] (ii) Predict two physical

06 0620 43 4RP

5 LE 2018 06204318 [Turn over 3 Cobalt is a transition element. Potassium is in Group I of the Periodic Table. (a) State one physical property that is similar for cobalt and potassium. [1] (b) (i) State one physical property that is different for cobalt and potassium. [1] (ii) Describe how the physical property given in (b)(i) is different for cobalt compared to

0620_w08_qp_03 - SlideShare

26/01/2015· [2] (b) Potassium and calcium are very reactive metals at the top of the series. Because their ions have different charges, K+ and Ca2+ , their compounds behave differently when heated. (i) Explain why the ions have different charges. [2] (ii) Their hydroxides are heated. If the compound decomposes, complete the word equation.

Extraction of Metals | CIE IGCSE Chemistry Revision …

The extraction of metals is a reduction process. Unreactive metals do not have to be extracted as they are often found as the uncoined element as they do not easily react with other substances. Extraction of metal and the reactivity series. The position of the metal on …

Edexcel iGCSE Chemistry: notes, flashcards, past …

2:26 (Triple only) know that an alloy is a mixture of a metal and one or more elements, usually other metals or carbon; 2:27 (Triple only) explain why alloys are harder than pure metals (f) Acids, alkalis and titrations. 2:28 describe the use of litmus, phenolphthalein and methyl orange to distinguish between acidic and alkaline solutions

Carbonates - IG Exams

(a) Explain how the addition of oxygen and calcium oxide removes these impurities. Include an equation for a reaction of oxygen and a word equation for a reaction of calcium oxide in this process.. [5] (b) Mild steel is the most common form of steel. Mild steel contains a maximum of 0.3% of carbon. High carbon steel contains 2% of carbon.

Corrosion - Metals and corrosion - OCR Gateway - …

Metals and corrosion Rusting can be prevented by keeping oxygen and water away, and by sacial protection. An alloy is a mixture of elements, including at least one metal.