Chemistry with Rafiq ⚗
Form 4 Chapter 2: Matter & Atomic Structure
COMMON MISTAKES MADE IN DRAWING QUESTIONS ❌‼️‼️
#chemistry #f4 #c2
-; ♡.° [ @serenenotes] ୭̥
Form 4 Chapter 2: Matter & Atomic Structure
COMMON MISTAKES MADE IN DRAWING QUESTIONS ❌‼️‼️
#chemistry #f4 #c2
-; ♡.° [ @serenenotes] ୭̥
❤7
do the drawing questions seriously although it only offers max 2 marks 💁💁
❤3👍1
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Today, I'd suggest focusing on progress over perfection. Take small steps towards your goals, and don't get discouraged by setbacks.
Consistency and determination are key. 🔐
Consistency and determination are key. 🔐
❤13
soo i prepared 30 questions, still from my ✨favourite✨ chapter Redox up until subtopic 1.3 Chemical Cell
1) Which of these reactions are redox reactions?
Anonymous Quiz
69%
Displacement of Halogens Reaction
15%
Acid-Base Reaction
16%
Double Decomposition Reaction
2) Which of these reactions are NOT redox reactions?
Anonymous Quiz
20%
Mg + CuSO₄ → MgSO₄ + Cu
58%
HCl + NaOH → NaCl + H₂O
23%
2Mg + CO₂ → 2MgO + C
3) Which substance is the oxidising agent?
H₂S + Cl₂ → S + 2HCl
H₂S + Cl₂ → S + 2HCl
Anonymous Quiz
48%
Cl₂
19%
H₂S
13%
HCl
19%
S
👍1🍓1
5) Which substance is the reducing agent?
Mg + 2HCl → MgCl₂ + H₂
Mg + 2HCl → MgCl₂ + H₂
Anonymous Quiz
46%
Mg
33%
HCl
9%
MgCl₂
12%
H₂
6) Which substance will undergoes reduction in a reaction?
Anonymous Quiz
22%
Potassium iodide, KI
40%
Acidified hydrogen peroxide, H₂O₂
20%
Potassium bromide, KBr
18%
Sulphur dioxide, SO₂
7) What is the change in oxidation number of chlorine?
2KClO₃ → 2KCl + 3O₂
2KClO₃ → 2KCl + 3O₂
Anonymous Quiz
44%
+5 to -1
21%
+5 to 0
15%
0 to +5
20%
0 to -1
8) What is the change in oxidation number of iron?
4Fe + 3O₂ → 2Fe₂O₃
4Fe + 3O₂ → 2Fe₂O₃
Anonymous Quiz
33%
0 to +2
43%
0 to +3
16%
+2 to +3
9%
+3 to +2
9) What is the observation that can be made from the experiment?
Anonymous Quiz
13%
No reaction occurs
54%
The brown solution turns pale green
33%
The brown solution becomes solid brown metal
10) What is the observation when the product is poured into excess NaOH?
Anonymous Quiz
14%
Soluble green solution formed
29%
Soluble brown solution formed
26%
Insoluble green precipitate formed
30%
Insoluble brown precipitate formed