Question

Assertion : The spectrum of $He^+$ is expected to be similar to that of hydrogen.
Reason : $He^+$ is also one electron system.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

All species like He⁺, Li²⁺, Be³⁺ having one electron are expected to have similar spectrum as that of hydrogen.