Question

Statement I: Elements in a group have similar properties.
Statement II: Their valence shells have the same energy.

• A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
• B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
• C. Assertion is correct statement but reason is wrong statement.
• D. Assertion is wrong statement but reason is correct statement.
• E. Both assertion and reason are wrong statements.
  

Answer 1

The correct option is C

Assertion is correct statement but reason is wrong statement.

Elements present in a group have similar physical and chemical properties
Since these elements have similar valence electrons in their outermost shell from which the group number is derived, so electronic configuration in outer shell is same but valence shells have different energy.