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Question

Which of the following is not a metal?


A

Copper

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B

Silver

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C

Lead

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D

Germanium

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Solution

The correct option is D

Germanium


Metals: An element with high electrical conductivity, luster, and malleability is called a metal. For example, CopperCu, SilverAg, and LeadPb.

Metalloids: An element whose properties are intermediate between those of metals and solid non-metals or semiconductors. For example, ArsenicAs, AntimonySb, and GermaniumGe.

The explanation for the correct answer:

Option D: GermaniumGe

  • Properties of germanium are intermediate between those of metals and solid non-metals.
  • It is an example of metalloids.
  • So, option D is the right answer.

The explanations for the incorrect answers:

Option A: CopperCu

  • Copper has high electrical conductivity, luster, and malleability.
  • It is an example of metal
  • So, option A is the wrong answer.

Option B: SilverAg

  • Silver has high electrical conductivity, luster, and malleability.
  • It is an example of metal
  • So, option B is the wrong answer.

Option C: LeadPb

  • Lead has high electrical conductivity, luster, and malleability.
  • It is an example of metal
  • So, option C is the wrong answer.

Conclusion:

So, GermaniumGe is not an example of metal its metalloids.

Therefore, the right answer is option D Germanium.


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