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Chemistry
9th -
12thgrade
3.2.3.1 Trends in physical properties [of the halogens]
20 questions
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- 1. Multiple Choice
Which statement is correct about the reaction between concentrated sulfuric acid and solid sodium bromide?
Bromide ions are reduced.
Hydrogen bromide and sulfur are formed.
Sulfuric acid acts as an oxidising agent.
Bromine and hydrogen sulfide are formed.
- 2. Multiple Choice
Which is the best technique to remove the silver chloride that forms when aqueous solutions of silver nitrate and sodium chloride react?
Refluxing
Evaporation
Filtration
Distillation
- 3. Multiple Choice
Which statement about astatine is correct?
Astatine has a greater electronegativity than bromine
Astatine is a better oxidising agent than bromine
Astatine has a greater boiling point than bromine
Astatine has a greater first ionisation energy than bromine
- 4. Multiple Choice
Which species is not produced by a redox reaction between solid sodium iodide and concentrated sulfuric acid?
Na2SO4
H2S
S
SO2
- 5. Multiple Choice
Which equation represents a reaction that does take place?
Cl2 + 2NaI ⟶ 2NaCl + I2
Br2 + 2NaCl ⟶ 2NaBr + Cl2
NaCl + H2O ⟶ HCl + NaOH
2HCl + H2SO4 ⟶ Cl2 + SO2 + 2H2O
- 6. Multiple Choice
Which species is the best oxidising agent?
Cl2
Cl−
Br 2
Br−
- 7. Multiple Choice
Which of these substances reacts most rapidly to produce a silver halide precipitate with acidified silver nitrate?
CH3Br
CH3Cl
CH3F
CH3l
- 8. Multiple Choice
The boiling points of the halogens increase down Group VII because
covalent bond strengths increase.
bond polarities increase.
the surface areas of the molecules increase.
electronegativities increase.
- 9. Multiple Choice
An aqueous solution of a sodium salt gave no precipitate when treated with either silver nitrate solution or barium chloride solution. Which one of the following could be the formula of the sodium salt?
NaI
Na2SO4
NaBr
NaF
- 10. Multiple Choice
On heating, magnesium reacts vigorously with element X to produce compound Y. An aqueous solution of Y, when treated with aqueous silver nitrate, gives a white precipitate that is readily soluble in dilute aqueous ammonia. What is the minimum mass of X that is needed to react completely with 4.05 g of magnesium?
11.83 g
5.92 g
5.33 g
2.67 g
- 11. Multiple Choice
Which one of the following can act as an oxidising agent but not as a reducing agent?
CH3CHO
Fe2+
I−
MnO4-
- 12. Multiple Choice
Which one of the following statements concerning halogen chemistry is true?
Sodium chloride produces chlorine when treated with concentrated sulphuric acid.
Sodium chloride produces chlorine when treated with bromine.
Sodium bromide produces bromine when treated with concentrated sulphuric acid.
Sodium bromide produces bromine when treated with iodine in aqueous potassium iodide.
- 13. Multiple Choice
An aqueous solution of a white solid gives a yellow precipitate with aqueous silver nitrate. The formula of the white solid could be
AgBr
AgI
NaBr
NaI
- 14. Multiple Choice
What will you see when a solution of silver nitrate is added to a solution containing bromide ions, and concentrated aqueous ammonia is added to the resulting mixture?
a white precipitate soluble in concentrated aqueous ammonia
a white precipitate insoluble in concentrated aqueous ammonia
a cream precipitate soluble in concentrated aqueous ammonia
a yellow precipitate insoluble in concentrated aqueous ammonia
- 15. Multiple Choice
Which one of the following statements is true?
A blue solution containing the ion [CoCl4]2− turns pink when added to an excess of water.
A purple solution is formed when chlorine is bubbled into aqueous sodium bromide.
A yellow precipitate is formed when aqueous silver nitrate is added to aqueous sodium chloride.
A green solution containing the ion [CuCl4]2− turns blue when added to an excess of concentrated hydrochloric acid.
- 16. Multiple Choice
In which one of the following reactions does the metal species undergo reduction?
MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
[Cu(H2O)6]2++ 4Cl− → [CuCl4]2− + 6H2O
CrO72- + 2OH− → 2CrO42- + H2O
TiO2 + 2C + 2Cl2 → TiCl4 + 2CO
- 17. Multiple Choice
A white salt dissolves in water to give a solution which gives a cream coloured precipitate when aqueous silver nitrate is added. This precipitate is insoluble in dilute aqueous ammonia but is soluble in concentrated aqueous ammonia. The original white salt could be
AgI
NaI
AgBr
NaBr
- 18. Multiple Choice
The reaction between sodium iodide and concentrated phosphoric acid produces hydrogen iodide but no iodine. The reaction of sodium iodide with concentrated sulphuric acid produces mainly iodine. The difference in product occurs because, in comparison with sulphuric acid, phosphoric acid is
the weaker acid.
the stronger oxidising agent.
the weaker oxidising agent.
the stronger reducing agent.
- 19. Multiple Choice
Which one of the following is not a correct trend down Group VII?
The first ionisation energy of the atom decreases.
The oxidising power of the element increases.
The electronegativity of the atom decreases.
The boiling point of the element increases.
- 20. Multiple Choice
Which one of the following statements is true?
Bromine liberates iodine from aqueous sodium iodide.
Chlorine liberates fluorine from aqueous sodium fluoride.
Silver iodide is soluble in aqueous ammonia.
Concentrated sulphuric acid liberates chlorine from solid sodium chloride.
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