JEE Main 202315 AprilMorning Shift
- Exam
- JEE Main
- Year
- 2023
- Date
- 15 April
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- s Block Elements
JEE Main 2023 · 15 April · Morning Shift · Chemistry · s Block Elements
Given below are two statements: One is labelled as Assertion A and...
Given below are two statements: One is labelled as Assertion and the other is labelled as Reason :
Assertion (A) : and produce characteristic flame
Reason (R) : The excitation energy is high in and
In the light of the above statements, choose the correct answer from the options given below:
Options
- A is true but is false
- BBoth and are true but is NOT the correct explanation of
- CBoth ( and are true and is the correct explanation of
- D is false but is true
Correct answer
D. is false but is true
Step-by-step solution
In , the electrons are strongly bound. The energy required to excite these electrons is very high. Therefore, when the electron reverts back to its original position, the energy released does not fall in the visible region. Hence, no colour in the flame is seen.