Groups 1 & 2 Chemistry Questions PDF

1. Which Group 1 element produces a crimson-red ame in a ame test? a) Sodium (Na) b) Potassium (K) c) Lithium (Li) d) Rubidium (Rb) Answer: c) Lithium (Li) 2. Which Group 2 element produces a brick-red ame in a ame test? a) Magnesium (Mg) b) Calcium (Ca) c) Strontium (Sr) d) Barium (Ba) Answer: b...

1. Which Group 1 element produces a crimson-red ame in a ame test? a) Sodium (Na) b) Potassium (K) c) Lithium (Li) d) Rubidium (Rb) Answer: c) Lithium (Li) 2. Which Group 2 element produces a brick-red ame in a ame test? a) Magnesium (Mg) b) Calcium (Ca) c) Strontium (Sr) d) Barium (Ba) Answer: b) Calcium (Ca) 3. What is the general trend in the solubility of Group 2 hydroxides down the group? a) Increases b) Decreases c) Remains constant d) No clear trend Answer: a) Increases 4. What is the general trend in the solubility of Group 2 sulfates down the group? a) Increases b) Decreases c) Remains constant d) No clear trend Answer: b) Decreases 5. Which of the following Group 1 carbonates is the *least* thermally stable? a) Li₂CO₃ b) Na₂CO₃ c) K₂CO₃ d) Cs₂CO₃ fl fl fl fl Answer: a) Li₂CO₃ 6. Which of the following Group 2 carbonates is the *most* thermally stable? a) BeCO₃ b) MgCO₃ c) CaCO₃ d) BaCO₃ Answer: d) BaCO₃ 7. What is the general trend in the thermal stability of Group 1 carbonates down the group? a) Increases b) Decreases c) Remains constant d) No clear trend Answer: a) Increases 8. What is the general trend in the thermal stability of Group 2 carbonates down the group? a) Increases b) Decreases c) Remains constant d) No clear trend Answer: a) Increases 9. What is the general trend in the thermal stability of group 1 hydroxides down the group? a) Increases b) Decreases c) Remains the same d) No clear trend Answer: a) Increases 10. What is the general trend in the thermal stability of group 2 hydroxides down the group? a) Increases b) Decreases c) Remains the same d) No clear trend Answer: a) Increases 11. What are the products when a Group 1 metal reacts with water? a) Metal oxide + hydrogen gas b) Metal hydroxide + hydrogen gas c) Metal + hydrogen gas d) Metal oxide + water Answer: b) Metal hydroxide + hydrogen gas 12. What are the products when a Group 2 metal (like magnesium) reacts with *cold* water? a) Metal oxide + hydrogen gas b) Metal hydroxide + hydrogen gas c) Metal + hydrogen gas d) Metal oxide + water Answer: b) Metal hydroxide + hydrogen gas 13. What are the products when a Group 2 metal (like magnesium) reacts with *steam*? a) Metal oxide + hydrogen gas b) Metal hydroxide + hydrogen gas c) Metal + hydrogen gas d) Metal hydroxide + water Answer: a) Metal oxide + hydrogen gas 14. Which Group 1 element is the most reactive with water? a) Lithium (Li) b) Sodium (Na) c) Potassium (K) d) Cesium (Cs) Answer: d) Cesium (Cs) 15. Which Group 2 element is the *least* reactive with water? a) Beryllium (Be) b) Magnesium (Mg) c) Calcium (Ca) d) Strontium (Sr) Answer: a) Beryllium (Be) 16. What is the trend in reactivity of Group 1 metals with water down the group? a) Increases b) Decreases c) Remains constant d) No clear trend Answer: a) Increases 17. What is the trend in reactivity of Group 2 metals with water down the group? a) Increases b) Decreases c) Remains constant d) No clear trend Answer: a) Increases 18. What is the charge on a Group 1 ion? a) +1 b) +2 c) -1 d) -2 Answer: a) +1 19. What is the charge on a Group 2 ion? a) +1 b) +2 c) -1 d) -2 Answer: b) +2 20. Why are group one metals called alkali metals? a) They form acidic solutions when reacted with water. b) They form alkaline solutions when reacted with water. c) They do not react with water d) They are not metals Answer: b) They form alkaline solutions when reacted with water.