Reactions of Metals with Water

The video tutorial explores the reactions of various metals with water in different states: cold, hot, and steam. It highlights how metals like magnesium, sodium, and calcium react with cold water, with sodium catching fire due to an exothermic reaction. The reactivity series is discussed, showing magnesium as the most reactive with hot water, forming magnesium hydroxide and hydrogen. Metals like aluminium, iron, and zinc react with steam to form metal oxides and hydrogen, while gold, silver, and copper do not react with water at all.

Which metal reacts with cold water in the initial activity?

• Iron

• Copper

• Magnesium

• Aluminium

What happens when sodium reacts with water?

• It remains unchanged

• It forms a solid

• It catches fire

• It dissolves

Why does calcium start floating in water?

• It reacts with air

• It is less dense than water

• It forms a gas

• Hydrogen gas bubbles stick to it

Which metals do not react with cold or hot water but react with steam?

• Gold and Silver

• Aluminium and Zinc

• Copper and Lead

• Sodium and Potassium

Which metal reacts vigorously with cold water to produce hydrogen gas?

• Lead

• Potassium

• Zinc

• Iron

What is the result of the reaction between 2 Na and 2 H2O?

• Na2O and H2

• NaOH and H2

• NaCl and H2

• Na2SO4 and H2

What is the order of reactivity with hot water from most to least reactive?

• Copper, Lead, Iron, Aluminium, Magnesium

• Magnesium, Aluminium, Iron, Lead, Copper

• Iron, Aluminium, Magnesium, Copper, Lead

• Lead, Copper, Magnesium, Iron, Aluminium

What forms when magnesium reacts with hot water?

• Magnesium chloride

• Magnesium sulfate

• Magnesium hydroxide

• Magnesium oxide

Which metals do not react with water at all?

• Calcium, Magnesium

• Sodium, Potassium

• Iron, Zinc, Aluminium

• Gold, Silver, Copper

What is produced when aluminium reacts with steam?

• Aluminium nitrate

• Aluminium oxide

• Aluminium sulfate

• Aluminium chloride