Assertion: In complex [Mn(H₂O)₆]⁺², the d-d transitions are spin allowed. Reason: Each of the d-orbitals of Mn(II) is singly occupied.

There are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as under:

1. A and R are both correct and R is the correct explanation of A.
2. A and R are both correct and R is not the correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R are both incorrect.

Assertion: Laporte restriction is not applicable to tetrahedral complexes. Reason: The tetrahedral complexes of the same ions are more intensely coloured than the octahedral complexes.

There are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as under:

1. A and R are both correct and R is the correct explanation of A.
2. A and R are both correct and R is not the correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R are both incorrect.

Which of the following statements is/are false?

1. The d-d transition band occurs only in visible region.
2. The position of charge transfer band depends on the nature of metal and ligand.
3. Frequencies greater than 10,000 cm^-1 are not accessible experimentally.

Which of the following conditions is fulfilled for spin and Laporte allowed transitions?

The ground state term symbol for trivalent niobium ion is

Assertion: Complex [Co(NH₃)₃F]⁺² gives absorption bands in the far ultra-violet region but in complex [Co(NH₃)₃Br]⁺², absorption occurs at a longer wavelength. Reason: These peaks are of low intensity and their extinction coefficients are usually between 1 and 50.

There are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as under:

 1. A and R are both correct and R is the correct explanation of A.
2. A and R are both correct and R is not the correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R are both incorrect.

Which of the following statements is/are correct?

1. The intensity of a spin forbidden transition is about one-hundredth of that of a spin allowed transition.
2. For d² configuration, the ground state terms ³F and ³P are considered.
3. The intense red color of [Fe(SCN)₆]⁺³ ion is due to metal to ligand charge transfer spectra.

The transitions that involve change in subsidiary quantum number and have high absorbance are

Which among the following statements is/are false about ground state term?

1. For ground state term, the value of spin multiplicity is the highest.
2. If more than two states have the same spin multiplicity, then the term having the lowest value of L will be ground state term.
3. For half filled or less than half filled orbital, the ground state term is that which has the highest value of J.

Which of the following will be the decreasing order of Δ_o values for the given complexes?

1. [Co(NH₃)₆]⁺³
2. [Rh(NH₃)₆]⁺³
3. [Ir(NH₃)₆]⁺³

For d-d transition, absorption from electronic excitation always appears as broad bands and not as sharp lines. It is due to which of the following reasons?

1. Molecular vibrations
2. Spin orbital coupling 3 John-Teller effect
3. Laporte forbidden transition

Match the columns.

Match column I with column II.

Assertion: The mixing of d and p orbitals does not occur in octahedral complexes which have centre of symmetry, like [Ni(NH₃)₆]⁺² and [Co(NH₃)₆]⁺³_. Reason: In these cases, the metal ligand bonds vibrate so that the ligands spend most of their time out of their centrosymmetric equilibrium position.

There are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as under:

1. A and R are both correct and R is the correct explanation of A.
2. A and R are both correct and R is not the correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R are both incorrect.

Which of the following statements is/are false?

A. The spin and Laporte forbidden molar absorption coefficients are very low. B. Multiplicity forbidden transition bands are sharp while multiplicity allowed transition yields broad bands. C. Substitution in octahedral complexes, which destroys the centre of symmetry of the ligand, gives weak absorption.