Pre-S1:
Given: N₂(g) + 3H₂(g) ---> 2NH₃(g)
What is the volume of the reaction mixture when 20.0 cm³ of N₂ is mixed with 40.0 cm³ of H₂ and allowed to react completely?
Given: N₂(g) + 3H₂(g) ---> 2NH₃(g)
What is the volume of the reaction mixture when 20.0 cm³ of N₂ is mixed with 40.0 cm³ of H₂ and allowed to react completely?
Final Results
30%
A. 26.7 cm³
38%
B. 33.3 cm³
11%
C. 40.0 cm³
21%
D. 60.0 cm³
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S2T10:
A student strongly heated one mole of magnesium nitrate, starting from room temperature. What is the maximum volume of gases produced?
[Assume molar volume = 24.4 dm³ mol⁻¹]
A student strongly heated one mole of magnesium nitrate, starting from room temperature. What is the maximum volume of gases produced?
[Assume molar volume = 24.4 dm³ mol⁻¹]
Final Results
31%
A. 24.4 dm³
22%
B. 48.8 dm³
38%
C. 61.0 dm³
9%
D. 122 dm³
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S2T10:
Which of the following ions is formed when a beryllium salt undergeos complete hydrolysis in water?
Which of the following ions is formed when a beryllium salt undergeos complete hydrolysis in water?
Final Results
6%
A. Be²⁺
40%
B. [Be(OH)₄]²⁻
28%
C. [Be(H₂O)₄]²⁺
27%
D. [Be(H₂O)₃(OH)]⁺
S2T10:
What is the name of the [Be(OH)₄]²⁻ ion?
What is the name of the [Be(OH)₄]²⁻ ion?
Final Results
8%
A. Beryllate ion
29%
B. Tetrahydroxoberyllate ion
11%
C. Tetrahydroxideberyllium ion
52%
D. Tetrahydroxidoberyllate(II) ion
Pre-S1:
Which of the following properties is the same between carbon-12 and carbon-14?
Which of the following properties is the same between carbon-12 and carbon-14?
Final Results
20%
A. Nuclear activity
39%
B. Physical properties
24%
C. Crystalline structure
17%
D. Path of movement in a mass spectrometer
Dear S1 students/teachers,
These are the STPM Chemistry Semester 1 books under the NEW SYLLABUS for the 2026 cohort (intake: 10 June 2025).
Click on ‘Leave a comment’ to view the book covers. Please ensure you purchase the correct edition.
Remember to support GENUINE copies to encourage local authors/teachers to continue producing quality educational resources.
😁😜😍
Thank you.
These are the STPM Chemistry Semester 1 books under the NEW SYLLABUS for the 2026 cohort (intake: 10 June 2025).
Click on ‘Leave a comment’ to view the book covers. Please ensure you purchase the correct edition.
Remember to support GENUINE copies to encourage local authors/teachers to continue producing quality educational resources.
😁😜😍
Thank you.
❤5👍4
STPM Chemistry (Sem 1, 2 & 3) ❤️ Malaysia 💗 pinned «Dear S1 students/teachers, These are the STPM Chemistry Semester 1 books under the NEW SYLLABUS for the 2026 cohort (intake: 10 June 2025). Click on ‘Leave a comment’ to view the book covers. Please ensure you purchase the correct edition. Remember to support…»
S2T10:
Which of the following explains why beryllium tends to form covalent compounds or ionic compounds with significant covalent character?
Which of the following explains why beryllium tends to form covalent compounds or ionic compounds with significant covalent character?
Final Results
7%
A. Beryllium has very low ionisation energy.
38%
B. Beryllium has a diagonal relationship with aluminium.
1%
C. Beryllium has a very high standard enthalpy of hydration.
54%
D. Beryllium has a small atomic radius and a low shielding effect.
Pre-S1:
Atoms X and Y are Period 2 elements. Atom X has four valence electrons while atom Y has six. Which of the following statements is true?
Atoms X and Y are Period 2 elements. Atom X has four valence electrons while atom Y has six. Which of the following statements is true?
Final Results
19%
A. X reacts with Y to form a stable covalent molecule with the formula X₂O₄.
38%
B. The stable compound formed by X and Y contains two double covalent bonds.
15%
C. The melting point of Y is higher than that of X.
28%
D. X is a metalloid, while Y is a non-metal.
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S2T10/T11:
Which of the following compounds does not show similar acid-base properties to the others?
Which of the following compounds does not show similar acid-base properties to the others?
Final Results
37%
A. BaO
44%
B. BeO
7%
C. PbO
11%
D. SnO₂
S2T11:
X is a p-block element with 4 valence electrons. X has the highest melting point among the elements in its group. What is the identity of X?
X is a p-block element with 4 valence electrons. X has the highest melting point among the elements in its group. What is the identity of X?
Final Results
54%
A. Carbon
27%
B. Silicon
10%
C. Lead
9%
D. Tin
Pre-S1:
Which of the following statements is correct?
Which of the following statements is correct?
Final Results
24%
A. The mass of 1 mole of oxygen gas is 16.0 g.
33%
B. The total number of atoms in 1 mole ozone is 1.81 × 10²⁴.
26%
C. 4.0 g of helium and 2.0 g of hydrogen contain the same number of atoms.
17%
D. Diamond and graphite have the same physical properties.
S2T10:
Which of the following compounds is unstable in aqueous solution?
Which of the following compounds is unstable in aqueous solution?
Final Results
35%
A. Aluminium carbonate
19%
B. Aluminium sulphate
35%
C. Aluminium fluoride
11%
D. Aluminium nitrate
Pre-STPM:
A solution of barium hydroxide has a concentration of 0.015 mol dm⁻³. What is the pH of this solution?
A solution of barium hydroxide has a concentration of 0.015 mol dm⁻³. What is the pH of this solution?
Final Results
8%
A. 1.52
14%
B. 1.82
46%
C. 12.18
32%
D. 12.48
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S2T11:
X is an element in Period 3 and Group 14.
Which of the following statements is true?
X is an element in Period 3 and Group 14.
Which of the following statements is true?
Final Results
19%
A. XO is a basic oxide.
29%
B. X can exhibit catenation.
11%
C. XO₂ is a brown-black glassy solid.
42%
D. XO₂ has the highest melting point among the oxides of Period 3.
Pre-S1:
Which of the following is the incorrect name for the groups listed?
Which of the following is the incorrect name for the groups listed?
Final Results
43%
A. Group 2: Alkali metals
51%
B. Group 16: Chalcogens
5%
C. Group 17: Halogens
1%
D. Group 18: Noble gases
S2T11:
Which of the following alloys does not contain tin?
Which of the following alloys does not contain tin?
Final Results
9%
A. Pewter
9%
B. Solder
32%
C. Bronze
51%
D. Stellite
S2T12:
Which of the following is the strongest oxidising agent?
Which of the following is the strongest oxidising agent?
Final Results
39%
A. Fluoride ion
14%
B. Iodide ion
36%
C. Chlorine
12%
D. Iodine
Pre-STPM:
Which of the following pairs is isobar?
Which of the following pairs is isobar?
Final Results
11%
A. H and He
21%
B. ¹²C and ¹³C
40%
C. ²⁴Na and ²⁴Mg
29%
D. C(graphite) and C(fullerene)
S2T12:
Which of the following is the weakest reducing agent?
Which of the following is the weakest reducing agent?
Final Results
5%
A. Bromide ion
9%
B. Chloride ion
51%
C. Fluoride ion
35%
D. Iodide ion