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
11) What would happen when we pour a solution containing Iron(III) ions into potassium thiocyanate, KSCN?
Anonymous Quiz
21%
Brown solution formed
33%
Brown precipitate formed
14%
Light red solution formed
33%
Blood red solution formed
12) What is the observation that can be made when we dip a silver metal in a copper(ii) sulphate solution?
Anonymous Quiz
32%
No reaction takes place
25%
Grey metal deposited
18%
Brown metal deposited
24%
Blue solution turns paler
13) Write the complete, correct ionic equation for this reaction.
Pb + 2AgNO₃ → Pb(NO₃)₂ + 2Ag
Pb + 2AgNO₃ → Pb(NO₃)₂ + 2Ag
Anonymous Quiz
13%
Pb + Ag⁺ → Pb⁺ + Ag
38%
Pb + Ag⁺ → Pb²⁺ + Ag
49%
Pb + 2Ag⁺ → Pb²⁺ + 2Ag
14) How a brown metal is deposited when a magnesium ribbon is added into a copper(ii) sulphate solution?
Anonymous Quiz
9%
Magnesium is reduced
43%
Copper is reduced and displaced by magnesium
33%
Copper is oxidised and displaced by magnesium
14%
Magnesium becomes the oxidising agent to copper