Cambridge IGCSE Chemistry Paper 2-Extended (F/M-25)

Which container contains gas at the highest pressure?

• A

• B

• C

• D

Which statement is correct?

• Between U and V, the substance is condensing.

• Between V and W, heat is being absorbed from the surroundings

• Between W and X, the particles are close together and randomly arranged.

• Between Y and Z, the substance is changing from a liquid to a solid.

Which gas diffuses fastest?

• A carbon dioxide

• B hydrogen chloride

• C hydrogen sulfide

• D nitrogen dioxide

How many of these atoms or ions have the same electronic configuration as S^2–?

• 0

• 1

• 2

• 3

Which statement about these isotopes is correct?

• A They have different chemical properties because they have different numbers of neutrons.

• B They have the same chemical properties because they have the same number of outer shell electrons.

• C They have the same nucleon number because the sum of the number of protons and electrons is the same.

• D They have different positions in the Periodic Table because they have different numbers of neutrons.

What happens to the electrons when lithium atoms and nitrogen atoms form ions?

• each lithium atom loses one electron to form an Li⁺ ion each nitrogen atom gains three electrons to form an N^3– ion

• each lithium atom loses one electron to form an Li⁺ ion each nitrogen atom gains five electrons to form an N^5– ion

• each lithium atom gains one electron to form an Li^– ion each nitrogen atom loses three electrons to form an N³⁺ ion

• each lithium atom gains one electron to form an Li^– ion each nitrogen atom loses five electrons to form an N⁵⁺ ion

For which covalent compound does the dot-and-cross diagram correctly show the outer shell electrons?

• A

• B

• C

• D

Which row identifies the positive and the negative particles present in a giant metallic lattice?

• A anions cations

• B anions delocalised electrons

• C cations anions

• D cations delocalised electrons

Which formula for the named compound is correct?

• A calcium oxide, CaO

• B cobalt(II) chloride, Co₂Cl

• C sulfur dioxide, S₂O₂

• D anhydrous copper(II) sulfate, Cu(SO4)₂

Which mass of magnesium sulfate is formed when 12 g of magnesium completely reacts with dilute sulfuric acid?

• A 5 g

• B 10 g

• C 60 g

• D 120 g