Group 7 Chemistry Questions PDF

1. What is the physical state of chlorine at room temperature and pressure? a) Solid b) Liquid c) Gas d) Aqueous Answer: c) Gas 2. What is the physical state of bromine at room temperature and pressure? a) Solid b) Liquid c) Gas d) Aqueous Answer: b) Liquid 3. What is the physical state of iodin...

1. What is the physical state of chlorine at room temperature and pressure? a) Solid b) Liquid c) Gas d) Aqueous Answer: c) Gas 2. What is the physical state of bromine at room temperature and pressure? a) Solid b) Liquid c) Gas d) Aqueous Answer: b) Liquid 3. What is the physical state of iodine at room temperature and pressure? a) Solid b) Liquid c) Gas d) Aqueous Answer: a) Solid 4. What is the trend in the boiling points of the halogens down the group? a) Increases b) Decreases c) Remains constant d) No clear trend Answer: a) Increases 5. What is the primary reason for the trend in boiling points down Group 7? a) Increasing nuclear charge b) Decreasing atomic radius c) Increasing number of electrons, leading to stronger induced dipole- dipole forces d) Decreasing electronegativity Answer: c) Increasing number of electrons, leading to stronger induced dipole-dipole forces 6. What is the trend in the reactivity of the halogens down the group? a) Increases b) Decreases c) Remains constant d) No clear trend Answer: b) Decreases 7. What is the primary reason for the trend in reactivity down Group 7? a) Increasing electronegativity b) Decreasing attraction between the nucleus and outer electrons c) Increasing number of electron shells d) Decreasing boiling point Answer: b) Decreasing attraction between the nucleus and outer electrons 8. What is the term used to describe a reaction where a more reactive halogen displaces a less reactive halide from its salt? a) Neutralization b) Precipitation c) Displacement d) Combination Answer: c) Displacement 9. Which halogen is the strongest oxidizing agent? a) Fluorine (F₂) b) Chlorine (Cl₂) c) Bromine (Br₂) d) Iodine (I₂) Answer: a) Fluorine (F₂) 10. Which halide ion is the strongest reducing agent? a) Fluoride (F⁻) b) Chloride (Cl⁻) c) Bromide (Br⁻) d) Iodide (I⁻) Answer: d) Iodide (I⁻) 11. What is the color of chlorine gas? a) Colorless b) Green c) Orange d) Violet Answer: b) Green 12. What is the color of bromine liquid? a) Colorless b) Green c) Orange/ Brown d) Violet Answer: c) Orange/ Brown 13. What is the colour of solid iodine? a) Green b) Orange c) Violet d) Grey/ Black Answer: d) Grey/ Black 14. What is the colour of aqueous chlorine? a) Colourless b) Pale Green c) Orange d) Brown Answer: b) Pale Green 15. What is the colour of aqueous bromine? a) Colourless b) Pale Green c) Orange d) Brown Answer: c) Orange 16. What is the colour of aqueous iodine? a) Colourless b) Pale Green c) Orange d) Brown Answer: d) Brown 17. In the reaction Cl₂ + 2NaBr → 2NaCl + Br₂, which species is oxidized? a) Cl₂ b) NaBr c) NaCl d) Br⁻ Answer: d) Br⁻ 18. In the reaction Cl₂ + 2NaBr → 2NaCl + Br₂, which species is reduced? a) Cl₂ b) NaBr c) NaCl d) Br₂ Answer: a) Cl₂ 19. In the reaction Cl₂ + 2NaBr → 2NaCl + Br₂, which species is the oxidizing agent? a) Cl₂ b) NaBr c) NaCl d) Br₂ Answer: a) Cl₂ 20. In the reaction Cl₂ + 2NaBr → 2NaCl + Br₂, which species is the reducing agent? a) Cl₂ b) NaBr c) NaCl d) Br⁻ Answer: d) Br⁻