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Q: The diamagnetic ion is:

A) Ni²⁺

B) Cr³⁺

C) Mn²⁺

D) Cu⁺

Answer: D. Cu⁺

Q: Potassium ferrocyanide is a:

A) Normal salt

B) Mixed salt

C) Double salt

D) Complex salt

Answer: D. Complex salt

Q: The co-ordination compound [CuCl₄]²⁻ exists in the shape of:

A) Tetrahedral

B) Octahedral

C) Square planar

D) Rhombic

Answer: A. Tetrahedral

Q: The oxidation state of chromium in CrO₂Cl₂ is:

A) +2

B) +3

C) +4

D) +6

Answer: D. +6

Q: [BeF₄]²⁻ is an example of a:

A) Square planar

B) Tetrahedral complexes

C) Bent structure

D) Octahedral

Answer: B. Tetrahedral complexes

Q: Which of the following is a typical transition element?

A) Zn

B) Cd

C) Ra

D) Co

Answer: D. Co

Q: The paramagnetic nature of a substance depends on:

A) The number of electrons in the outermost orbit

B) The number of electrons that are easily ejected

C) The number of unpaired electrons

D) The number of lone pairs of electrons

Answer: C. The number of unpaired electrons

Q: Ligands are:

A) Electron-pair donors

B) Electron-pair acceptors

C) Always neutral

D) Both donor and then acceptor

Answer: A. Electron-pair donors

Q: Which one is not ferromagnetic?

A) Fe

B) Co

C) Sb

D) Ni

Answer: C. Sb

Q: The coordination number of iron in [Fe(CN)₆]⁴⁻ is:

A) 9

B) 3

C) 4

D) 6

Answer: D. 6

Q: Select the ligand which is bidentate:

A) H₂O

B) NH₃

C) CO

D) C₂O₄²⁻

Answer: D. C₂O₄²⁻

Q: Cu²⁺ salt solution is blue in colour due to transition of electron from:

A) s → p orbital

B) d → d orbital

C) p → d orbital

D) p → p orbital

Answer: B. d → d orbital

Q: Electronegativity of Be is approximately equal to that of:

A) Al

B) Mg

C) B

D) Ar

Answer: A. Al

Q: The elements which are most abundant in Earth's crust are:

A) Si and Al

B) Ca and Mg

C) B and Ar

D) B and Ai

Answer: A. Si and Al

Q: Carbonates of Li are not stable like those of sodium due to:

A) Low electronegativity

B) Low electropositivity

C) High charge density of Li⁺

D) Low charge density of Li⁺

Answer: C. High charge density of Li⁺

Q: Which one of the following metal sulphates is not soluble in water:

A) Na₂SO₄

B) K₂SO₄

C) BaSO₄

D) ZnSO₄

Answer: C. BaSO₄

Q: Which of the following alkali metals forms only the normal oxide with O₂?

A) Li

B) K

C) Na

D) Rb

Answer: A. Li

Q: Strongest reducing agent among the halogens is:

A) Cl₂

B) F₂

C) Br₂

D) I₂

Answer: D. I₂

Q: Which of the following has the lowest electron affinity?

A) F

B) I

C) Br

D) Cl

Answer: B. I

Q: Which of the following halides has the highest melting point?

A) NaCl

B) NaBr

C) NaF

D) NaI

Answer: C. NaF