Mg2+ is preferred in photosynthesis by chlorophyll because:a)It has strong spin–orbit coupling.b)It has weak spin–orbit coupling.c)It is a heave metal.d)It binds strongly with chlorophyll.Correct answer is option 'B'. Can you explain this answer?

Question

Mg2+ is preferred in photosynthesis by chlorophyll because:a)It has strong spin&#8211;orbit coupling.b)It has weak spin&#8211;orbit coupling.c)It is a heave metal.d)It binds strongly with chlorophyll.Correct answer is option 'B'. Can you explain this answer?

Answer

Explanation:

Chlorophyll is a green pigment present in plants that is involved in photosynthesis, which is the process of converting light energy into chemical energy. Chlorophyll contains a central magnesium ion (Mg2+) which is essential for its function.

The reason why Mg2+ is preferred in photosynthesis by chlorophyll is because of its weak spin-orbit coupling. Spin-orbit coupling is the interaction between the spin and orbital motion of an electron. The strength of spin-orbit coupling is determined by the atomic number of the element. Elements with higher atomic numbers have stronger spin-orbit coupling.

Here's why Mg2+ is preferred in photosynthesis by chlorophyll:

1. Weak spin-orbit coupling: Mg2+ has a relatively low atomic number (12) compared to other metal ions, which means it has weaker spin-orbit coupling. This is beneficial for photosynthesis because it allows for efficient energy transfer between the chlorophyll molecules.

2. Essential for chlorophyll function: Mg2+ is an essential component of chlorophyll and is required for its function in photosynthesis. Without Mg2+, chlorophyll cannot absorb light and convert it into chemical energy.

3. Abundant in the environment: Mg2+ is abundant in the environment and is readily available for use by plants. This makes it a convenient choice for chlorophyll to use in photosynthesis.

In summary, Mg2+ is preferred in photosynthesis by chlorophyll because of its weak spin-orbit coupling, essential role in chlorophyll function, and abundance in the environment.

Answer

B)It has weak spin–orbit coupling. so intersystem crossing is inhibited which favours the energy tranfer from the excited singlet state.

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