S3 (Quiz):
Which of the following options contains only compounds that can react with iron(III) chloride?
Which of the following options contains only compounds that can react with iron(III) chloride?
Final Results
24%
A. Ethanoyl chloride, phenol
31%
B. Phenol, phenylmethanol
14%
C. Aniline, benzyl alcohol
31%
D. Phenol, benzoic acid
Dear subscribers,
I will stop creating and posting questions in this group until the end of March.
Thank you.
Do your best, and all the best.
I will stop creating and posting questions in this group until the end of March.
Thank you.
Do your best, and all the best.
❤25👍2
Ace Your STPM Semester 2 Chemistry with the Express STPM Semester 2 Chemistry Guide.
Designed for both early learning and last-minute preparation, this Chemistry book ensures that you master key concepts and excel in your S2 exam.
Key Features:
1.Concise, Comprehensive Notes:
Clear explanations of essential topics for quick learning and review.
2.Exam-Style Exercises with Answers:
Practice questions aligned with real marking schemes to sharpen your skills.
3.Optimised for High Scores:
Perfect for both early mastery and focused last-minute revision.
4.Real Exam Format:
Exercises reflect the actual exam structure, ensuring you're fully prepared.
Master S2 Chemistry with confidence—get your copy today and boost your STPM success!
Place your order at the Shopee link below:
https://my.shp.ee/B7bytMP
Support original copies.
Thank you.
Designed for both early learning and last-minute preparation, this Chemistry book ensures that you master key concepts and excel in your S2 exam.
Key Features:
1.Concise, Comprehensive Notes:
Clear explanations of essential topics for quick learning and review.
2.Exam-Style Exercises with Answers:
Practice questions aligned with real marking schemes to sharpen your skills.
3.Optimised for High Scores:
Perfect for both early mastery and focused last-minute revision.
4.Real Exam Format:
Exercises reflect the actual exam structure, ensuring you're fully prepared.
Master S2 Chemistry with confidence—get your copy today and boost your STPM success!
Place your order at the Shopee link below:
https://my.shp.ee/B7bytMP
Support original copies.
Thank you.
❤1👍1
1. How many isomers are there of a compound with the formula C₄H₁₀O?
Ans: 8
2. How many structural isomers are there of a compound with the formula C₄H₁₀O?
Ans: 7
3. How many isomers are there of an alcohol with formula C₄H₁₀O?
Ans: 5
4. How many structural isomers are there of an alcohol with formula C₄H₁₀O?
Ans: 4
Ans: 8
2. How many structural isomers are there of a compound with the formula C₄H₁₀O?
Ans: 7
3. How many isomers are there of an alcohol with formula C₄H₁₀O?
Ans: 5
4. How many structural isomers are there of an alcohol with formula C₄H₁₀O?
Ans: 4
👍2
1.D
2.A
3.C
4.B
5.C
6.B
7.B
8.D
9.C
10.B
11.D
12.A
13.A
14.D
15.B
Senang atau susah lihat usaha
Sudah usaha pasti tiada masalah
2.A
3.C
4.B
5.C
6.B
7.B
8.D
9.C
10.B
11.D
12.A
13.A
14.D
15.B
Senang atau susah lihat usaha
Sudah usaha pasti tiada masalah
👍25
S1/U1
What do you think about the level of difficulty for the STPM S1 Chemistry 2025?
What do you think about the level of difficulty for the STPM S1 Chemistry 2025?
Final Results
7%
A. Easy
37%
B. Moderate
35%
C. Challenging
21%
D. Very challenging
👍1
STPM Chemistry (Sem 1, 2 & 3) ❤️ Malaysia 💗 pinned «Dear subscribers, I will stop creating and posting questions in this group until the end of March. Thank you. Do your best, and all the best.»
S2T8:
Which of the following is the correct half-equation at the anode for the electrolysis of dilute sulphuric acid?
Which of the following is the correct half-equation at the anode for the electrolysis of dilute sulphuric acid?
Final Results
10%
A. 2H⁺(aq) + 2e⁻ ---> H₂(g)
12%
B. 2SO₄²⁻(aq) ---> S₂O₈²⁻(aq) + 2e⁻
47%
C. 2H₂O(l) ---> O₂(g) + 4H⁺(aq) + 4e⁻
22%
D. 4OH⁻(aq) ---> O₂(g) + 2H₂O(l) + 4e⁻
8%
E. 2H₂O(l) + 2e⁻ ---> H₂(g) + 2OH⁻(aq)
S2T7:
Which of the following equations corresponds to the lattice dissociation energy?
Which of the following equations corresponds to the lattice dissociation energy?
Final Results
7%
A. C₆H₁₂O₆(s) ----> 6C(g) + 12H(g) + 6O(g)
18%
B. C₆H₁₂O₆(s) ----> 6C(s) + 6H₂(g) + 3O₂(g)
45%
C. MgSO₄(s) ----> Mg²⁺(g) + SO₄²⁻(g)
30%
D. Mg²⁺(g) + SO₄²⁻(g) ----> MgSO₄(s)
*S2T7:**
Which of the following enthalpy changes describes the following equation?
Br₂(l) ----> 2Br(g)
Which of the following enthalpy changes describes the following equation?
Br₂(l) ----> 2Br(g)
Final Results
17%
A. Standard enthalpy of vapourisation
55%
B. Standard enthalpy of atomisation
13%
C. Bond enthalpy
15%
D. None of the above
S2T7:
Which of the following equations correspond to the standard enthalpy change of atomisation?
Which of the following equations correspond to the standard enthalpy change of atomisation?
Final Results
55%
I. Hg(l) ----> Hg(g)
77%
II. ¹/₂ I₂(s) ----> I(g)
17%
III. H₂O(g) ----> 2H(g) + O(g)
25%
IV. CH₃CH₂OH(l) ----> 2C(g) + 6H(g) + O(g)
S2T7:
Which of the following acids produces the most exothermic standard enthalpy change of neutralisation when it reacts with aqueous potassium hydroxide solution?
Which of the following acids produces the most exothermic standard enthalpy change of neutralisation when it reacts with aqueous potassium hydroxide solution?
Final Results
3%
A. Ethanoic acid
63%
B. Sulphuric acid
23%
C. Hydrofluoric acid
11%
D. Hydrochloric acid
S2T7:
Which of the following is true about the following thermochemical equation?
2NH₃(g) ----> 2N(g) + 6H(g) ∆H₁= +x kJ
Which of the following is true about the following thermochemical equation?
2NH₃(g) ----> 2N(g) + 6H(g) ∆H₁= +x kJ
Final Results
14%
A. The bond enthalpy of the N-H covalent bond is +x/3 kJ mol⁻¹.
32%
B. The standard enthalpy change of formation of ammonia is -x/2 kJ mol⁻¹.
16%
C. ∆H₁ represents the standard enthalpy change of atomisation for ammonia.
38%
D. None of the above.
S2T7:
Which of the following enthalpy changes corresponds to the equation below?
Al³⁺(g) ----> Al³⁺(aq)
Which of the following enthalpy changes corresponds to the equation below?
Al³⁺(g) ----> Al³⁺(aq)
Final Results
15%
A. Enthalpy of solution
69%
B. Enthalpy of hydration
4%
C. Lattice dissociation energy
13%
D. None of the above
S2T7:
Which of the following statements is/are true?
Which of the following statements is/are true?
Final Results
23%
Sublimation of iodine is the same as atomisation of iodine
36%
The standard enthalpy of formation of H₂O is equal to the standard enthalpy of combustion of H₂O
54%
The standard enthalpy of vapourisation of Hg is equal to the standard enthalpy of atomisation of Hg
67%
Lattice dissociation energy and lattice formation energy are equal in magnitude but opposite in sign
S2T8:
Which of the following half-equations corresponds to the reaction that occurs at the electrodes during the electrolysis of 0.001 mol dm⁻³ aqueous potassium bromide?
Which of the following half-equations corresponds to the reaction that occurs at the electrodes during the electrolysis of 0.001 mol dm⁻³ aqueous potassium bromide?
Final Results
44%
A. Anode: 2H₂O(l) ---> O₂(g) + 4H⁺(aq) + 4e⁻
15%
B. Anode: 4OH⁻(aq) ---> O₂(g) + 2H₂O(l) + 4e⁻
27%
C. Anode: 2Br⁻(aq) ---> Br₂(aq) + 2e⁻
14%
D. Cathode: 2H⁺(aq) + 2e⁻ ----> H₂(g)
👍2
S2T8:
Which of the following compounds has a different oxidation half-equation during electrolysis?
Which of the following compounds has a different oxidation half-equation during electrolysis?
Final Results
29%
A. Dil. HCl(aq)
17%
B. HNO₃(aq)
30%
C. KOH(aq)
25%
D. NaF(aq)
S2T8:
An electric current of 2.00 A is used for the anodisation of an aluminium object for 15 minutes, causing the mass of the anode to increase by 0.120 g. What is the percentage yield of this electrolysis?
[Ar: O=16.0; Al=27.0. F=9.65×10⁴ C mol⁻¹]
An electric current of 2.00 A is used for the anodisation of an aluminium object for 15 minutes, causing the mass of the anode to increase by 0.120 g. What is the percentage yield of this electrolysis?
[Ar: O=16.0; Al=27.0. F=9.65×10⁴ C mol⁻¹]
Final Results
9%
A. 12.6%
27%
B. 37.9%
29%
C. 71.4%
36%
D. 80.4%