IGCSE Chemistry MC Quiz 2

1. The diagrams show the arrangement of particles in three different physical states of substance X.

Which statement about the physical states of substance X is correct?

• A. Particles in state 1 vibrate about fixed positions.

• B. State 1 changes to state 2 by diffusion.

• C. State 2 changes directly to state 3 by condensation.

• D. The substance in state 3 has a fixed volume.

2. What is always true for a pure substance?

• A. It always boils at 100 °C.

• B. It contains only one type of atom.

• C. It has a sharp melting point.

• D. It is solid at room temperature.

3. Element Y has a mass number of 19 and a proton number of 9. Which group in the Periodic Table does it belong to?

• A. I

• B. III

• C. VII

• D. VIII

5. The table shows the structure of different atoms and ions. What are the values of W, X, Y and Z?

• A. W = 10, X = 10, Y = 9, Z = 9

• B. W = 10, X = 12, Y = 10, Z = 9

• C. W = 12, X = 10, Y = 9, Z = 10

• D. W = 12, X = 12, Y = 10, Z = 10

6. The diagram shows the structure of an atom.

Which diagram shows the structure of an isotope of this atom?

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7. Which two elements react together to form an ionic compound?

• A. R and T

• B. T and X

• C. X and Z

• D. Z and R

8. Which diagram does not show the outermost shell electrons in the molecule correctly?

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9. The chemical formulae of two substances, W and X, are given.

W: NaAlSi₃O₈

X: CaAl₂Si₂O₈

Which statements are correct?

(1) W and X contain the same amount of oxygen.

(2) W contains three times as much silicon as X.

(3) X contains twice as much aluminium as W.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

10. The apparatus shown can be used to measure the rate of some chemical reactions.

For which two reactions would this apparatus be suitable?

(1) AgNO₃ (aq) + HCl (aq) -> AgCl (s) + HNO₃ (aq)

(2) 2H₂O₂ (aq) -> 2H₂O (l) + O₂ (g)

(3) MgO (s) + 2HCl (aq) -> MgCl₂ (aq) + H₂O (l)

(4) ZnCO₃ (s) + 2HCl (aq) -> ZnCl₂ (aq) + CO₂ (g) + H₂O (l)

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (4) only

• D. (3) and (4) only