Y10 Periodic Table 3 - Group 1

Which is the most reactive of these Group 1 metals?

• Lithium

• Sodium

• Potassium

Which is the least reactive of these Group 1 metals?

• Lithium

• Sodium

• Potassium

What are the products of the reaction between lithium and water?

• Lithium oxide and hydrogen

• Lithium hydroxide and oxygen

• Lithium hydroxide and hydrogen

• Lithium alkali and gas

What are the products of the reaction between potassium and water?

• Potassium oxide and hydrogen

• Potassium hydroxide and oxygen

• Potassium hydroxide and hydrogen

• Potassium alkali and gas

Which of the following observations will you make when lithium, sodium or potassium is added to water?

• lilac flame

• the metals sink to the bottom of the container

• the metals move on the surface of the water

• a squeaky pop is heard

Which of the following is the correct, balanced equation for the reaction of sodium with water?

• Na + H₂O → H₂ + NaOH

• Na + H₂O → H₂ + NaO

• 2Na + 2H₂O → H₂ + 2NaOH

• Na + H₂O → O₂ + NaH₂

What is the formula for lithium hydroxide?

• LiOH
• Li₂OH

• Li(OH)₂

• Li₂O

Which of the following observations is NOT made when sodium reacts with water?

• The metal moves on the surface of the water

• The metal disappears

• There is a lilac flame

• There is effervescence (of hydrogen gas)

What is the test for hydrogen gas?

• Lighted splint burns with a squeaky pop

• Glowing splint re-lights

• Bubble gas through limewater and it turns cloudy

• Damp litmus paper is bleached

Universal indicator turns from green to blue if it is placed into the solution formed when lithium reacts with water. Why?

• the hydrogen produced is alkaline

• the lithium hydroxide produced is acidic

• the lithium hydroxide produced is alkaline

• the hydrogen produced is acidic