Question

Study the given table carefully and identify metals W, X, Y and Z .

Metal	Water	Air	Acid
W	Explosive	Explosive	Explosive
X	Vigorous	Vigorous	Vigorous
Y	Moderate	Moderate	Moderate
Z	No reaction	No reaction	No reaction

• A. W: Potassium, X: Calcium, Y: Zinc, Z: Aluminium
• B. W: Sodium, X: Magnesium, Y: Iron, Z: Gold
• C. W: Magnesium, X: Sodium, Y: Zinc, Z: Calcium
• D. W: Magnesium, X: Gold, Y: Sodium, Z: Zinc

Answer 1

The correct option is B W: Sodium, X: Magnesium, Y: Iron, Z: Gold

• Sodium is highly reactive metal. It reacts explosively with water, air and acid. So, W is sodium.
• Magnesium reacts vigorously with water, air and acid. So, X is magnesium.
• Iron reacts moderately water, air and acid. So, Y is iron.
• Gold is least reactive metal and does not react with water, air and acid. So, Z is gold.