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
15) Can copper displaces silver from a silver nitrate solution? Why?
Anonymous Quiz
55%
Yes, copper is a more electropositive metal than silver
13%
Yes, copper is a more electronegative metal than silver
15%
No, copper is a more electropositive metal than silver
17%
No, copper is a more electronegative metal than silver
16) Write the complete oxidising half-equation for this reaction
2Al + 3Cl₂ → 2AlCl₃
2Al + 3Cl₂ → 2AlCl₃
Anonymous Quiz
68%
Al → Al³⁺ + 3e⁻
13%
Al → Al⁺ + e⁻
6%
Cl⁻ → Cl + e⁻
13%
2Cl⁻ → Cl₂ + e⁻
17) What is the colour of iodine in 1,1,1-trichloroethane solution?
Anonymous Quiz
17%
Colourless
33%
Pale yellow
10%
Yellow
40%
Purple
18) What is the observation that can be made from the experiment?
Anonymous Quiz
24%
Brown solution of KBr turns colourless
46%
Colourless solution of KBr turns brown
22%
Colourless solution of Cl₂ turns yellow
8%
Yellow solution of Cl₂ turns brown
19) Why do Cl₂ is a better oxidising agent than Br₂?
Anonymous Quiz
35%
It is easier for Cl₂ atom to release its valence electron
57%
It is easier for Cl₂ atom to accept an electron to its valence shell
8%
It is easier for Br₂ atom to accept an electron to its valence shell
❤1
20) Write the complete ionic equation for the reaction between potassium chloride with iodine water.
Anonymous Quiz
33%
No ionic equation can be made because no reaction occurs
25%
No ionic equation can be made because there is a precipitate formed
30%
2Cl⁻ + I₂ → Cl₂ + 2I⁻
12%
Cl₂ + 2I⁻ → 2Cl⁻ + I₂
21) This table proves that...
Anonymous Quiz
36%
Lithium is a better oxidising agent
32%
Lead is a better oxidising agent
20%
Lead is a better reducing agent
12%
Lead cannot be displaced by Lithium in a reaction
22) Molecules with a more positive or less negative E° value are...
Anonymous Quiz
47%
Easier to undergo reduction
27%
A stronger reducing agent
17%
Greater tendency to donate electrons
9%
A weaker oxidising agent
23) What is the function of a salt bridge?
Anonymous Quiz
11%
Allowing chemicals to mix
13%
Allowing precipitate to form
76%
Allowing ions to flow
24) Which of these substances has a higher reducing strength?
Anonymous Quiz
39%
Lithium
11%
Lead
22%
Hydrogen
28%
Fluorine