CIE iGCSE Co-Ordinated Science C8.1 Arrangement of elements Exam Style Questions Paper 2
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.
Question
Which row shows the conditions used in the Haber process?
| temperature/°C | pressure/atm | catalyst | |
|---|---|---|---|
| A | 150 | 200 | iron |
| B | 150 | 400 | vanadium oxide |
| C | 450 | 200 | iron |
| D | 450 | 400 | vanadium oxide |
▶️Answer/Explanation
Answer: C
Explanation: The Haber process typically operates at a temperature of around 450°C, a pressure of 200 atm, and uses an iron catalyst.