Home / iGCSE / Coordinated Sciences / C8.1 Arrangement of elements Paper 2

CIE iGCSE Co-Ordinated Science C8.1 Arrangement of elements Exam Style Questions Paper 2

CIE iGCSE Co-Ordinated Science Paper 2 - All Chapters

Question

Which element in Period 3 of the Periodic Table has the greatest metallic character?

A. the element with the highest relative atomic mass
B. the element with the lowest group number
C. the element with the most outer-shell electrons
D. the element with the most protons

▶️ Answer/Explanation
Metallic character decreases from left to right across a period. Elements with lower group numbers are positioned on the left side of the period, where metallic character is strongest. In Period 3, sodium (Group I) has the greatest metallic character. Option A is incorrect because elements with higher relative atomic mass are further to the right and less metallic. Option C is incorrect because more outer-shell electrons means elements are closer to Group VIII and are non-metals. Option D is incorrect because more protons also indicates elements further to the right.
✅ Answer: (B)

Question

All Group I metal compounds and all Group II metal chlorides are soluble in water.

All Group II metal carbonates and barium sulfate are insoluble.

Which method is used to prepare barium sulfate using barium carbonate?

A. direct combination of solid barium carbonate and dilute sulfuric acid
B. reaction of solid barium carbonate and hydrogen chloride gas, followed by reaction with dilute sulfuric acid
C. reaction of aqueous barium carbonate with dilute hydrochloric acid, followed by reaction with aqueous sodium sulfate
D. reaction of solid barium carbonate with dilute hydrochloric acid, followed by reaction with aqueous sodium sulfate

▶️ Answer/Explanation
Direct addition of sulfuric acid to barium carbonate (option A) would immediately form insoluble \(\text{BaSO}_4\) as a coating that prevents further reaction; instead, the barium carbonate must first be dissolved in dilute \(\text{HCl}\) to form soluble barium chloride solution.
The barium chloride solution is then mixed with aqueous sodium sulfate, causing precipitation: \(\text{BaCl}_2(aq) + \text{Na}_2\text{SO}_4(aq) \rightarrow \text{BaSO}_4(s) + 2\text{NaCl}(aq)\); barium carbonate is a solid (insoluble), so option C (aqueous barium carbonate) is incorrect — the solid must be reacted with acid, matching option D.
✅ Answer: (D)

Question

Elements in Group VI share similar chemical and physical trends as elements in Group VII.
Which statement about the elements of Group VI is correct?
(A)  Atoms of Group VI elements form cations when they react with sodium.
(B)  Sulfur has a lower boiling point than tellurium.
(C)  Selenium displaces sulfur from metal sulfides.
(D)  The elements become lighter in colour as Group VI is descended.

▶️Answer/Explanation

Ans: B

Question

Element X is a dense solid with a high melting point.

Which letter shows the position of X in the Periodic Table?

▶️Answer/Explanation

Ans : B 

Question 

Which statement about elements in the Periodic Table is correct?

A The density of the elements in Group I increases up the group.
B The metallic character of the elements increases across a period from left to right.
C The number of protons in the atoms of the elements increases across a period from left to right.
D The reactivity of the elements in Group I decreases down the group.

▶️Answer/Explanation

Answer: C

Explanation: A – Incorrect: Group I density increases DOWN the group (opposite of stated) B – Incorrect: Metallic character DECREASES across a period left to right C – Correct: Proton number (atomic number) always increases left to right in periods D – Incorrect: Group I reactivity INCREASES down the group The number of protons defines the element and always increases across a period.

More CIE iGCSE Co-Ordinated Science Paper 2 Questions..
Scroll to Top