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Question

Statement 1: Every element has a unique valency.
Statement 2: Some elements have the tendency of both giving and accepting electrons.


  1. both the statements are true
  2. only statement 1 is true
  3. both the statements are false
  4. only statement 2 is true


Solution

The correct option is D

only statement 2 is true


The statement 1 is false. Many elements can have more than one valencies. Examples- Phosphorus has a variable valency, 3 and 5 it means that it can either gain 3 electrons or lose 5 electrons.

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