Which is true about the ionic radius of M²⁺?

1. Ni²⁺<Cu²⁺<Zn²⁺

2. Ni²⁺>Cu²⁺>Zn²⁺

3. Cu²⁺<Ni²⁺<Zn²⁺

4. Zn²⁺<Ni²⁺<Cu²⁺

Which of the following will not give a positive chromyl chloride test?

(1) CuCl₂

(2) ZnCl₂

(3) HgCl₂

(4) NH₄Cl

Which of the following can not exist together in aqueous solution?

1. HgCl₂ and SnCl₂

2. HgCl₂ and SnCl₄

3. SnCl₄ and FeCl₃

4. SnCl₄ and PbCl₄

Find the ion corresponding to a magnetic moment of 3.9 B.M.

1. Fe⁺³

2. Mn⁺²

3. Co⁺²

4. Cu⁺²

The inner transition element is not represented by the atomic number among 59, 74, 95, 102, and 104.

1. 59

2. 95

3. 102

4. 104

Which of the following is the correct order of second ionization energy?

1. V > Cr > Mn

2. V < Cr < Mn

3. V < Cr > Mn

4. V > Cr < Mn

Dimethyl glyoxime in a suitable solvent was refluxed for 10 minutes with pure pieces of nickel sheet, it will result in

1. Red precipitate

2. Blue precipitate

3. Yellow precipitate

4. No precipitate

Why is Fe³⁺ stable, whereas Mn³⁺ is unstable in acidic solution?

1. O₂ oxidises Mn²⁺ to Mn³⁺
2. O₂ oxidises both Mn⁺² to Mn⁺³ and Fe²⁺ to Fe³⁺
3. Fe³⁺ oxidises H₂O to O₂
4. Mn³⁺ oxidised H₂O to O₂

Which of the following statements about Re–Re bonding in [Re₂X₈]²⁻ is incorrect?

Choose the correct statement regarding bonding in FeCl₃ at high temperature.

(I) It contains a 2c-2e- bond.

(II) It contains a 3c-2e- bond.

(III) It contains a coordinate bond.

1. (I), (II)

2. (I), (III)

3. (II), (III)

4. (I), (II) & (III)