Questions and Answers of Cambridge IGCSE Chemistry

a. Copy out and complete the table, which covers the different methods of preparing salts.b. Write word and balanced chemical equations for each reaction shown in your table. Also write ionic
Study the following scheme.a. Give the names and formulae of substances A to E.b. Describe a test which could be used to identify the presence of water.c. Which indicator is suitable for the initial
In a titration involving 24.0 cm3 potassium hydroxide solution against a solution containing 1 mol dm−3 of sulfuric acid, 28.0 cm3 of the acid was found to just neutralise the alkali completely.a.
Explain the following, with the aid of examples:a. Neutralisationb. Titrationc. Soluble saltd. Insoluble salt.
Read the following passage and then answer the questions which follow.Sodium carbonate decahydrate effloresces quite readily. With some substances, such as solid sodium hydroxide, the reverse of
Copper(ii) sulfate crystals exist as the pentahydrate, CuSO4.5H2O. It is a salt hydrate. If it is heated quite strongly, the water of crystallisation is driven off and the anhydrous salt remains.a.
The diagram below shows part of the Periodic Table.Using only the symbols of the elements shown above, write down the symbol for an element which:a. Is a pale green coloured toxic gasb. Is stored
The proton number of barium (Ba) is 56. It is in Group II of the Periodic Table. a. How many electrons would you expect a barium atom to contain in its outer energy level?b. How would you expect
Find the element germanium (Ge) in the Periodic Table.a. Which group of the Periodic Table is this element in?b. How many electrons will it have in its outer energy level (shell)?c. Is germanium a
Three members of the halogens are: 35.517 Cl, 8035Br and 12753I.a. (i) Write down the electronic structure of an atom of chlorine.(ii) Why is the relative atomic mass of chlorine not a whole
‘By using displacement reactions it is possible to deduce the order of reactivity of the halogens.’ Discuss this statement with reference to the elements bromine, iodine and chlorine only.
Use the information given in the table below to answer the questions below concerning the elements Q, R, S, T and X.a. Which element has 22 neutrons in each atom?b. Which element is a noble gas?c.
a. Consider the chemical properties and physical properties of the halogens chlorine, bromine and iodine. Using these properties, predict the following about the other two halogens, fluorine and
Some of the most important metals we use are found in the transition element section of the Periodic Table. One of these elements is copper. Sodium, a Group I metal, has very different properties
Use the following list of metals to answer the questions a to i: iron, calcium, potassium, gold, aluminium, magnesium, sodium, zinc, platinum, titanium.a. Which of the metals is found native?b. Which
a. Name and give the formulae of the substances A to F.b. Write balanced chemical equations for the reactions in which:(i) Black solid A was formed(ii) White powder C and brown–pink solid B were
Explain the following:a. Metals such as gold and silver occur native in the Earth’s crustb. The parts of shipwrecks made of iron rust more slowly in deep waterc. Zinc bars are attached to the
Iron is extracted from its ores haematite and magnetite. Usually it is extracted from haematite (iron(iii) oxide). The ore is mixed with limestone and coke and reduced to the metal in a blast
The iron obtained from the blast furnace is known as pig or cast iron. Because of the presence of impurities, such as carbon, it has a hard and brittle nature. Most of this type of iron is therefore
The metal titanium is extracted from its ore rutile (TiO2).a. Describe the processes involved in the extraction f titanium from rutile.b. Name the area of the Periodic Table in which titanium is
Zinc can be reacted with steam using the apparatus shown. When gas A is collected, mixed with air and ignited it gives a small pop. A white solid B remains in the test tube when the reaction has
Copper is extracted in the final stage by roasting copper(i) sulfide (Cu2S) in a current of air. This converts the sulfide to the metal.Cu2S(s) + O2(g) → 2Cu(s) + SO2(g)a (i) What is the name of

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