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'X' metal is soft and can be easily cut with a knife. It catches fire when exposed to air and water and is also used in street lights. What is 'X'?
  • a)
    Sodium
  • b)
    Mercury
  • c)
    Calcium
  • d)
    Lithium
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
X metal is soft and can be easily cut with a knife. It catches fire wh...
Explanation:
The given metal is soft and can be easily cut with a knife. It catches fire when exposed to air and water and is also used in street lights.

Identifying the metal:
To identify the metal, let's analyze the given characteristics:


  • The metal is soft and can be easily cut with a knife. This eliminates metals like iron, steel, and copper, which are harder and cannot be easily cut with a knife.

  • The metal catches fire when exposed to air and water. This indicates that it is a highly reactive metal.

  • The metal is used in street lights. This suggests that it is a metal that can be used in electrical applications.


Determining the correct answer:
Considering the above characteristics, the metal 'X' can be identified as Sodium (Na).


  • Sodium is a soft metal that can be easily cut with a knife.

  • It is highly reactive and catches fire when exposed to air and water.

  • Sodium is also used in street lights, where it is combined with other elements to produce a bright yellow light.


Therefore, the correct answer is A: Sodium.
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X metal is soft and can be easily cut with a knife. It catches fire when exposed to air and water and is also used in street lights. What is X?a)Sodiumb)Mercuryc)Calciumd)LithiumCorrect answer is option 'A'. Can you explain this answer?
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