Question

Which of the following metals can be cut with a knife ?
1. Zinc
2. Iron
3. Sodium
4. Copper

Answer 1

Correct Answer - Option 3 : Sodium

The correct answer is Sodium.

• Sodium is an alkali metal and is so soft that it can be easily cut by a knife.
• It is a soft solid that has a low melting point and can be cut with a knife.
• While iron and gold are hard and dense metals that are malleable and ductile.
• Potassium metal can also be cut by a knife.
• Sodium and Potassium are highly reactive metals and react vigorously with the oxygen, carbon dioxide, and moisture present in the air such that it may even cause a fire. To prevent this explosive reaction, Sodium is kept stored in kerosene oil and potassium kept wrapped in paraffin wax.